@misc{PasternakSchwarzlosSchimmack, author = {Pasternak, Hartmut and Schwarzlos, Anja and Schimmack, N.}, title = {The application of adhesives to connect steel members}, series = {Journal of Constructional Steel research}, volume = {60}, journal = {Journal of Constructional Steel research}, number = {3-5}, issn = {0143-974X}, pages = {649 -- 658}, language = {en} } @inproceedings{PasternakKomann, author = {Pasternak, Hartmut and Komann, Steffen}, title = {Tower of Science and Technical Precision - A Steel Monument Requiring Advanced Calculation}, series = {Materiały konferencyjne - Konferencja Naukowa Zagadnienia Stan{\´o}w Granicznych Konstrukcji Stalowych, Krak{\´o}w, 22 - 23 kwietnia 2004}, booktitle = {Materiały konferencyjne - Konferencja Naukowa Zagadnienia Stan{\´o}w Granicznych Konstrukcji Stalowych, Krak{\´o}w, 22 - 23 kwietnia 2004}, publisher = {Krak{\´o}w}, pages = {227 -- 234}, language = {en} } @misc{PasternakBluemelStimpfleetal., author = {Pasternak, Hartmut and Bl{\"u}mel, Stefan and Stimpfle, Bernd and Rudorf-Witrin, Wolfgang}, title = {Von der CargoLifter-Werfthalle zu Tropical Islands - Entwurf}, series = {Bauingenieur}, volume = {80}, journal = {Bauingenieur}, issn = {0005-6650}, pages = {461 -- 469}, language = {de} } @incollection{PasternakSchwarzlos, author = {Pasternak, Hartmut and Schwarzlos, Anja}, title = {Kleben von Stahl}, series = {Stahlbau-Kalender 2005}, booktitle = {Stahlbau-Kalender 2005}, publisher = {Verlag Ernst}, address = {Berlin}, isbn = {3-433-01721-2}, pages = {785 -- 818}, language = {de} } @inproceedings{PasternakBartholome, author = {Pasternak, Hartmut and Bartholom{\´e}, Susanne Elisabeth}, title = {Girders with structured web - ongoing research}, series = {New developments in structural engineering and construction, Seventh International Structural Engineering and Construction Conference, Honolulu, Hawaii, from June 18 - 23, 2013, vol. 1}, booktitle = {New developments in structural engineering and construction, Seventh International Structural Engineering and Construction Conference, Honolulu, Hawaii, from June 18 - 23, 2013, vol. 1}, publisher = {Research Publishing Services}, address = {Singapore}, isbn = {978-981-07-5354-2}, pages = {551 -- 556}, language = {en} } @inproceedings{BartholomePasternak, author = {Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut}, title = {Girders with structured web - ongoing research}, series = {Structural Stability Research Council Annual Stability Conference 2013, St. Louis, Missouri, USA, 16 - 20 April 2013}, booktitle = {Structural Stability Research Council Annual Stability Conference 2013, St. Louis, Missouri, USA, 16 - 20 April 2013}, publisher = {Curran}, address = {Red Hook, NY}, isbn = {978-1-62748-338-4}, pages = {696 -- 709}, language = {en} } @inproceedings{PasternakKrauscheLaunert, author = {Pasternak, Hartmut and Krausche, Thomas and Launert, Benjamin}, title = {Welding of Thick Plates under Site Conditions - Evaluation of the Influence on the Structure Behaviour of Welded Assembly Joints}, series = {Design, fabrication and economy of metal structures, international conference proceedings 2013, Miskolc, Hungary, April 24 - 26, 2013}, booktitle = {Design, fabrication and economy of metal structures, international conference proceedings 2013, Miskolc, Hungary, April 24 - 26, 2013}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-642-36690-1}, pages = {455 -- 460}, language = {en} } @inproceedings{PasternakChwastekSeboek, author = {Pasternak, Hartmut and Chwastek, Agnieszka and Seb{\"o}k, Adam}, title = {Effects of Welding Repairs on the Load Bearing Capacity and on the Fatigue Life of Fillet Welds of Normal and Low Alloy High Strength Steels}, series = {Design, fabrication and economy of metal structures, international conference proceedings 2013, Miskolc, Hungary, April 24 - 26, 2013}, booktitle = {Design, fabrication and economy of metal structures, international conference proceedings 2013, Miskolc, Hungary, April 24 - 26, 2013}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-642-36690-1}, pages = {281 -- 286}, language = {en} } @techreport{PasternakDilger, author = {Pasternak, Hartmut and Dilger, Klaus}, title = {Einsatz der Schweißsimulation zur systematischen Entwicklung verbesserter Modelle f{\"u}r die Berechnung der Tragf{\"a}higkeit komplexer Stahlleichtbaustrukturen}, publisher = {Verlag und Vertriebsgesellschaft mbH}, address = {D{\"u}sseldorf}, isbn = {978-3-942541-31-2}, pages = {181}, language = {de} } @misc{CiupackPasternak, author = {Ciupack, Yvonne and Pasternak, Hartmut}, title = {Kleben, eine innovative F{\"u}getechnik im Stahlbau : Eurocode-basiertes Bemessungskonzept f{\"u}r Stahlklebverbindungen}, series = {BTU News : Zeitung der Brandenburgischen Technischen Universit{\"a}t Cottbus}, volume = {7}, journal = {BTU News : Zeitung der Brandenburgischen Technischen Universit{\"a}t Cottbus}, number = {32}, pages = {S. 35}, language = {de} } @inproceedings{CiupackPasternakDilgeretal., author = {Ciupack, Yvonne and Pasternak, Hartmut and Dilger, Klaus and Hanssen, Ekke}, title = {Eurocode-basiertes Bemessungskonzept f{\"u}r Klebverbindungen im Stahlbau}, series = {Kurzfassungen der Vortr{\"a}ge, 12. Kolloquium Gemeinsame Forschung in der Klebtechnik, 28. und 29. Februar 2012, DECHEMA-Haus, Frankfurt am Main}, booktitle = {Kurzfassungen der Vortr{\"a}ge, 12. Kolloquium Gemeinsame Forschung in der Klebtechnik, 28. und 29. Februar 2012, DECHEMA-Haus, Frankfurt am Main}, publisher = {DECHEMA}, address = {Frankfurt am Main}, pages = {17 -- 19}, language = {de} } @inproceedings{PasternakCiupack, author = {Pasternak, Hartmut and Ciupack, Yvonne}, title = {Eurocode-basiertes Bemessungskonzept f{\"u}r Klebverbindungen im Stahlbau (nach DIN 1990)}, series = {Tagungsband, 13. Kolloquium Gemeinsame Forschung in der Klebtechnik, 26. und 27. Februar 2013, DECHEMA-Haus, Frankfurt am Main}, booktitle = {Tagungsband, 13. Kolloquium Gemeinsame Forschung in der Klebtechnik, 26. und 27. Februar 2013, DECHEMA-Haus, Frankfurt am Main}, publisher = {DECHEMA}, address = {Frankfurt am Main}, pages = {66 -- 68}, language = {de} } @inproceedings{PasternakCiupack, author = {Pasternak, Hartmut and Ciupack, Yvonne}, title = {Development of Eurocode-based Design Rules for structural adhesive bonded joints in steel structures}, series = {2nd International Conference on Structural Adhesive Bonding 2013, Porto}, booktitle = {2nd International Conference on Structural Adhesive Bonding 2013, Porto}, publisher = {Faculty of Engineering, University of Porto}, address = {Porto}, isbn = {978-989-723-048-6}, pages = {S. 100}, language = {en} } @misc{PasternakKubieniecPiekarczyk, author = {Pasternak, Hartmut and Kubieniec, Gabriel and Piekarczyk, Marek}, title = {Adhesives in strengthening of steel structures}, series = {Engineering structures and technologies}, volume = {2}, journal = {Engineering structures and technologies}, number = {2}, issn = {2029-8838}, pages = {45 -- 50}, language = {en} } @inproceedings{Pasternak, author = {Pasternak, Hartmut}, title = {Sustainable Restoration of the Roof of a Large Indoor Pool}, series = {Sustainability of Construction, towards a better build environment, Proceedings of the final conference in Innsbruck, COST Action C25}, booktitle = {Sustainability of Construction, towards a better build environment, Proceedings of the final conference in Innsbruck, COST Action C25}, publisher = {Univ. of Malta, Dep. of Civil and Structural Engineering}, address = {Malta}, isbn = {978-99957-816-0-6}, pages = {535 -- 542}, language = {en} } @inproceedings{PasternakBartholome, author = {Pasternak, Hartmut and Bartholom{\´e}, Susanne Elisabeth}, title = {Girders with "honey-comb" structured web - ongoing research}, series = {Proceedings of the 10th International Conference on Steel, Space \& Composite Structures, Gazimagusa, North Cyprus, 18 - 20 May 2011}, booktitle = {Proceedings of the 10th International Conference on Steel, Space \& Composite Structures, Gazimagusa, North Cyprus, 18 - 20 May 2011}, publisher = {CI-Premier Pte Ltd,}, address = {Singapore}, isbn = {978-981-08-8815-2}, pages = {259 -- 266}, language = {en} } @inproceedings{PasternakKubieniec, author = {Pasternak, Hartmut and Kubieniec, Gabriel}, title = {Present state art of plate girders with sinussoidally corrugated web}, series = {Proceedings of the 10th International Conference on Steel, Space \& Composite Structures : Gazimagusa, North Cyprus, 18 - 20 May 2011}, booktitle = {Proceedings of the 10th International Conference on Steel, Space \& Composite Structures : Gazimagusa, North Cyprus, 18 - 20 May 2011}, publisher = {CI-Premier Pte Ltd.}, address = {Singapore}, isbn = {978-981-08-8815-2}, pages = {243 -- 257}, language = {en} } @misc{PasternakRobra, author = {Pasternak, Hartmut and Robra, J{\"o}rgen}, title = {Eurocode 3 - Bemessung und Konstruktion von Stahlbauten}, series = {Bauingenieur}, volume = {86}, journal = {Bauingenieur}, number = {7/8}, issn = {0005-6650}, pages = {336 -- 347}, language = {de} } @misc{PasternakBachmannKubieniec, author = {Pasternak, Hartmut and Bachmann, Volkmar and Kubieniec, Gabriel}, title = {Einsatz der Schweißsimulation zur Verbesserung der Tragf{\"a}higkeitsberechnungen komplexer Stahlleichtbaustrukuren}, series = {Bauingenieur}, volume = {86}, journal = {Bauingenieur}, number = {11}, issn = {0005-6650}, pages = {493 -- 500}, language = {de} } @inproceedings{PasternakKubieniecBachmann, author = {Pasternak, Hartmut and Kubieniec, Gabriel and Bachmann, Volkmar}, title = {Design of Light Steel Structures - Implementation of Welding Simulation}, series = {Eurosteel 2011, 6th European Conference on Steel and Composite Structures, August 31 - September 2, 2011 Budapest, vol. A}, booktitle = {Eurosteel 2011, 6th European Conference on Steel and Composite Structures, August 31 - September 2, 2011 Budapest, vol. A}, publisher = {ECCS}, address = {Brussels}, pages = {45 -- 50}, language = {en} } @inproceedings{PasternakCiupack, author = {Pasternak, Hartmut and Ciupack, Yvonne}, title = {Eurocode-based Design Rules for Adhesive Bonded Joints}, series = {Eurosteel 2011, 6th European Conference on Steel and Composite Structures, August 31 - September 2, 2011, Budapest, vol. A}, booktitle = {Eurosteel 2011, 6th European Conference on Steel and Composite Structures, August 31 - September 2, 2011, Budapest, vol. A}, publisher = {ECCS}, address = {Brussels}, pages = {717 -- 722}, language = {en} } @inproceedings{PasternakKubieniecBachmannetal., author = {Pasternak, Hartmut and Kubieniec, Gabriel and Bachmann, Volkmar and Karimian, Milad}, title = {Plate Girders with Corrugated Webs - Global and Local Buckling}, series = {Eurosteel 2011, 6th European Conference on Steel and Composite Structures, August 31 - September 2, 2011, Budapest, vol. A}, booktitle = {Eurosteel 2011, 6th European Conference on Steel and Composite Structures, August 31 - September 2, 2011, Budapest, vol. A}, publisher = {ECCS}, address = {Brussels}, pages = {741 -- 746}, language = {en} } @inproceedings{PasternakKubieniec, author = {Pasternak, Hartmut and Kubieniec, Gabriel}, title = {Flange buckling of sinusoidal corrugated girders}, series = {Thin-walled structures, proceedings of the 6th International Conference on Thin-Walled Structures held in Timisoara, Romania, 5 - 7 September 2011}, booktitle = {Thin-walled structures, proceedings of the 6th International Conference on Thin-Walled Structures held in Timisoara, Romania, 5 - 7 September 2011}, publisher = {ECCS}, address = {Brussels}, isbn = {978-92-9147-102-7}, pages = {625 -- 632}, language = {en} } @inproceedings{PasternakBartholome, author = {Pasternak, Hartmut and Bartholom{\´e}, Susanne Elisabeth}, title = {Eine neue Idee: Stahltr{\"a}ger mit strukturiertem Steg}, series = {18. DASt-Kolloquium, Aachen, 2012}, booktitle = {18. DASt-Kolloquium, Aachen, 2012}, publisher = {Frehner Consulting}, address = {F{\"u}ssen}, isbn = {978-3-929371-26-0}, pages = {131 -- 136}, language = {de} } @inproceedings{PasternakBartholome, author = {Pasternak, Hartmut and Bartholom{\´e}, Susanne Elisabeth}, title = {Girders with profiled and structured web - ongoing research}, series = {Proceedings of stability of structures XIII-th symposium, Zakopane 2012, September, 17 - 21, 2012}, booktitle = {Proceedings of stability of structures XIII-th symposium, Zakopane 2012, September, 17 - 21, 2012}, address = {Ł{\´o}dź}, isbn = {83-914019-7-9}, pages = {547 -- 560}, language = {en} } @inproceedings{PasternakBartholome, author = {Pasternak, Hartmut and Bartholom{\´e}, Susanne Elisabeth}, title = {Girders with profiled and structured web - ongoing research}, series = {12th International Scientific Conference VSU 2012, Sofia 2th International Scientific Conference VSU 2012, Sofia, Vol. III, Part 1 und 2}, booktitle = {12th International Scientific Conference VSU 2012, Sofia 2th International Scientific Conference VSU 2012, Sofia, Vol. III, Part 1 und 2}, pages = {1 -- 12}, language = {en} } @misc{PasternakCiupack, author = {Pasternak, Hartmut and Ciupack, Yvonne}, title = {Kalibrierung von Bemessungskonzepten gem{\"a}ß Eurocode am Beispiel von Klebverbindungen}, series = {Bauingenieur}, volume = {87}, journal = {Bauingenieur}, number = {3}, issn = {0005-6650}, pages = {116 -- 123}, language = {de} } @inproceedings{SahelliePasternak, author = {Sahellie, Samer and Pasternak, Hartmut}, title = {Temperature effect on the mechanical behaviour of aghesive-bonded steel joints under short and long-term loading}, series = {13th International Scientific Conference VSU 2013, Sofia, vol. 2}, booktitle = {13th International Scientific Conference VSU 2013, Sofia, vol. 2}, pages = {7 -- 12}, language = {en} } @inproceedings{PasternakKrausche, author = {Pasternak, Hartmut and Krausche, Thomas}, title = {The Porsche Pavilion in the Autostadt Wolfsburg, Germany}, series = {13th International Scientific Conference VSU 2013, Sofia, vol. 2}, booktitle = {13th International Scientific Conference VSU 2013, Sofia, vol. 2}, pages = {1 -- 6}, language = {en} } @misc{CiupackPasternak, author = {Ciupack, Yvonne and Pasternak, Hartmut}, title = {Thermisch getrennte Stirnplattenst{\"o}ße}, series = {Bauingenieur}, volume = {88}, journal = {Bauingenieur}, number = {12}, issn = {0005-6650}, pages = {532 -- 525}, language = {de} } @misc{PasternakCiupack, author = {Pasternak, Hartmut and Ciupack, Yvonne}, title = {Development of Eurocode-based design rules for adhesive bonded joints}, series = {International Journal of Adhesion and Adhesives}, volume = {53}, journal = {International Journal of Adhesion and Adhesives}, issn = {1879-0127}, doi = {10.1016/j.ijadhadh.2014.01.011}, pages = {97 -- 106}, language = {en} } @misc{PasternakKrauscheLaunert, author = {Pasternak, Hartmut and Krausche, Thomas and Launert, Benjamin}, title = {Schweißen von Tr{\"a}gern mit dicken Blechen, Teil 2: Schweißen unter Baustellenbedingungen - Montagestoß und Variation der Umgebungstemperatur}, series = {Bauingenieur}, volume = {89}, journal = {Bauingenieur}, number = {12}, issn = {0005-6650}, pages = {537 -- 547}, language = {de} } @inproceedings{PasternakLaunert, author = {Pasternak, Hartmut and Launert, Benjamin}, title = {Improved design approaches for the load bearing capacity of welded I-profiles from high strength steel considering realistic residual stresses}, series = {7th European Conference on Steel and Composite Structures (Eurosteel), Napoli, 2014}, booktitle = {7th European Conference on Steel and Composite Structures (Eurosteel), Napoli, 2014}, publisher = {ECCS European Convention for Constructional Steelwork}, address = {Brussels}, isbn = {978-92-9147-121-8}, pages = {159 -- 160}, language = {en} } @inproceedings{PasternakLaunert, author = {Pasternak, Hartmut and Launert, Benjamin}, title = {Erh{\"o}hung der Tragf{\"a}higkeit geschweißter I-Profile aus hochfestem Baustahl - Verbesserte Ans{\"a}tze zur Eigenspannungserfassung}, series = {19. DASt-Forschungskolloquium, 27.-28.Oktober 2014, Hannover}, booktitle = {19. DASt-Forschungskolloquium, 27.-28.Oktober 2014, Hannover}, publisher = {DASt}, address = {D{\"u}sseldorf}, isbn = {978-3-929371-33-8}, language = {de} } @misc{PasternakKrauscheLaunert, author = {Pasternak, Hartmut and Krausche, Thomas and Launert, Benjamin}, title = {Schweißen von Tr{\"a}gern mit dicken Blechen, Teil 1: Tr{\"a}gerfertigung unter Werksbedingungen - Planung, Herstellung und Simulation}, series = {Bauingenieur}, volume = {89}, journal = {Bauingenieur}, number = {10}, issn = {1436-4867}, pages = {395 -- 404}, language = {de} } @inproceedings{PasternakStojkovićLedeckyetal., author = {Pasternak, Hartmut and Stojković, Nenad and Ledecky, Lukas and Dilger, Klaus and Stammen, Elisabeth and Mette, Christoph}, title = {Adhesively bonded fa{\c{c}}ade joint under cyclic service loading}, series = {15th International Scientific Conference VSU 2015, Sofia 2015, Vol. 1}, booktitle = {15th International Scientific Conference VSU 2015, Sofia 2015, Vol. 1}, address = {VSU}, pages = {103 -- 108}, language = {en} } @misc{PasternakChwastek, author = {Pasternak, Hartmut and Chwastek, Agnieszka}, title = {Zur Entwicklung eines Bemessungskonzeptes f{\"u}r die Lebensdauer von Reparaturschweißungen. Teil 2 - Ermittlung der Schwingfestigkeitsklassen}, series = {Bauingenieur}, volume = {90}, journal = {Bauingenieur}, number = {6}, issn = {1436-4867}, pages = {272 -- 277}, language = {de} } @misc{PasternakChwastek, author = {Pasternak, Hartmut and Chwastek, Agnieszka}, title = {Zur Entwicklung eines Bemessungskonzeptes f{\"u}r die Lebensdauer von Reparaturschweißungen. Teil 1 - Stand der Technik und Versuche}, series = {Bauingenieur}, volume = {90}, journal = {Bauingenieur}, number = {2}, issn = {1436-4867}, pages = {47 -- 54}, language = {de} } @inproceedings{PasternakChwastek, author = {Pasternak, Hartmut and Chwastek, Agnieszka}, title = {Beitrag zur Entwicklung eines Bemessungskonzeptes f{\"u}r Dauerfestigkeitsberechnungen von Reparaturschweißungen}, series = {19. DASt-Forschungskolloquium in Hannover, 27. - 28. Oktober 2014}, booktitle = {19. DASt-Forschungskolloquium in Hannover, 27. - 28. Oktober 2014}, publisher = {Frehner Consulting GmbH Deutschland}, address = {D{\"u}sseldorf [u.a.]}, isbn = {978-3-929371-33-8}, pages = {143 -- 148}, language = {de} } @inproceedings{PasternakChwastek, author = {Pasternak, Hartmut and Chwastek, Agnieszka}, title = {Fatique assessment of non-load carrying fillet welds after seams repair and treatment procedures}, series = {7th European Conference on Steel and Composite Structures, Eurosteel, Neapel, 2014}, booktitle = {7th European Conference on Steel and Composite Structures, Eurosteel, Neapel, 2014}, publisher = {ECCS European Convention for Constructional Steelwork}, address = {Brussels}, isbn = {978-92-9147-121-8}, pages = {263 -- 264}, language = {en} } @inproceedings{PasternakBartholomeBulkowski, author = {Pasternak, Hartmut and Bartholom{\´e}, Susanne Elisabeth and Bulkowski, Marcin}, title = {Retrofitting of Cracks in Steel Construction - using CFRP Laminates}, series = {7th European Conference on Steel and Composite Structures, Eurosteel, Neapel 2014}, booktitle = {7th European Conference on Steel and Composite Structures, Eurosteel, Neapel 2014}, publisher = {ECCS European Convention for Constructional Steelwork}, address = {Brussels}, isbn = {978-92-9147-121-8}, language = {en} } @misc{PasternakSahellie, author = {Pasternak, Hartmut and Sahellie, Samer}, title = {Epoxy- and acrylic-bonded joints for strengthening lightweight steel girders}, series = {Stahlbau}, volume = {84}, journal = {Stahlbau}, number = {8}, issn = {0038-9145}, pages = {577 -- 583}, language = {en} } @misc{PasternakSahellie, author = {Pasternak, Hartmut and Sahellie, Samer}, title = {Expectancy of the lifetime of bonded steel joints due to long-term shear loading}, series = {Archives of Civil and Mechanical Engineering}, volume = {15}, journal = {Archives of Civil and Mechanical Engineering}, number = {4}, issn = {1644-9665}, doi = {10.1016/j.acme.2015.05.004}, pages = {1061 -- 1069}, language = {en} } @misc{PasternakCiupackSchieletal., author = {Pasternak, Hartmut and Ciupack, Yvonne and Schiel, Manuel and Ince, Erdeniz}, title = {Adhesive bonded joints in steel structures}, series = {Steel Construction}, volume = {7}, journal = {Steel Construction}, number = {3}, issn = {1867-0539}, pages = {173 -- 182}, language = {en} } @inproceedings{PasternakKrauscheLaunert, author = {Pasternak, Hartmut and Krausche, Thomas and Launert, Benjamin}, title = {Welding of thick steel plates under site conditions}, series = {7th European Conference on Steel and Composite Structures, Eurosteel, Neapel, 2014}, booktitle = {7th European Conference on Steel and Composite Structures, Eurosteel, Neapel, 2014}, publisher = {ECCS European Convention for Constructional Steelwork}, address = {Brussels}, isbn = {978-92-9147-121-8}, pages = {109 -- 110}, language = {en} } @inproceedings{PasternakCiupackSchieletal., author = {Pasternak, Hartmut and Ciupack, Yvonne and Schiel, Manuel and Ince, Erdeniz}, title = {Adhesive bonded joints in steel structures}, series = {7th European Conference on Steel and Composite Structures, Eurosteel, Neapel, 2014}, booktitle = {7th European Conference on Steel and Composite Structures, Eurosteel, Neapel, 2014}, publisher = {ECCS European Convention for Constructional Steelwork}, address = {Brussels}, isbn = {978-92-9147-121-8}, pages = {265 -- 266}, language = {en} } @inproceedings{PasternakStojković, author = {Pasternak, Hartmut and Stojković, Nenad}, title = {Fatique of adhesively bonded structural elements - residuel strenght models}, series = {14th International Scientific Conference VSU 2014, Sofia, 2014, Vol. 2}, booktitle = {14th International Scientific Conference VSU 2014, Sofia, 2014, Vol. 2}, publisher = {VSU}, pages = {34 -- 39}, language = {en} } @inproceedings{PasternakSahellie, author = {Pasternak, Hartmut and Sahellie, Samer}, title = {Concentration of the normal stresses in the adherends of adhesively-bonded double lap steel joints due to reducing the width of the bonded area}, series = {14th International Scientific Conference VSU 2014, Sofia, 2014, vol. 2}, booktitle = {14th International Scientific Conference VSU 2014, Sofia, 2014, vol. 2}, publisher = {Univ. of Structural Engineering and Architecture}, address = {Sofia}, pages = {197 -- 202}, language = {en} } @misc{SchlaichBleicherPasternak, author = {Schlaich, Mike and Bleicher, Achim and Pasternak, Hartmut}, title = {Der Porsche Pavillon in Monocoque-Bauweise}, series = {Bauingenieur}, volume = {89}, journal = {Bauingenieur}, number = {1}, issn = {1436-4867}, pages = {1 -- 10}, language = {de} } @misc{PasternakKrauscheNiemann, author = {Pasternak, Hartmut and Krausche, Thomas and Niemann, M.}, title = {Umbau eines Schulgeb{\"a}udes der Heinrich-Nordhoff-Gesamtschule in Wolfsburg}, series = {Bauingenieur}, volume = {89}, journal = {Bauingenieur}, number = {4}, issn = {1436-4867}, pages = {182 -- 185}, language = {de} } @misc{FeldmannGesslerUmmenhoferetal., author = {Feldmann, Markus and Geßler, Achim and Ummenhofer, Thomas and G{\"o}tz, Frank and Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut}, title = {Zum Kleben von CFK-Lamellen im Stahlbau}, series = {BTU Stahlbau-Symposium 2014, Cottbus, 2014}, journal = {BTU Stahlbau-Symposium 2014, Cottbus, 2014}, publisher = {BTU}, address = {Cottbus [u.a.]}, pages = {83 -- 90}, language = {de} } @inproceedings{PasternakMoradiKrausche, author = {Pasternak, Hartmut and Moradi, Milad and Krausche, Thomas}, title = {Reconstruction of a school building in Wolfsburg, Germany}, series = {Tubular Structures XV, Proceedings of the 15th International Symposium on Tubular Structures, Rio de Janeiro, Brazil, 27-29 May 2015}, booktitle = {Tubular Structures XV, Proceedings of the 15th International Symposium on Tubular Structures, Rio de Janeiro, Brazil, 27-29 May 2015}, publisher = {CRC Press}, address = {Hoboken}, isbn = {978-1-138-02837-1}, pages = {31 -- 35}, language = {en} } @misc{PasternakLaunertKrausche, author = {Pasternak, Hartmut and Launert, Benjamin and Krausche, Thomas}, title = {Welding of girders with thick plates — Fabrication, measurement and simulation}, series = {Journal of Constructional Steel Research}, volume = {Vol. 115}, journal = {Journal of Constructional Steel Research}, issn = {0143-974X}, doi = {10.1016/j.jcsr.2015.08.037}, pages = {407 -- 416}, abstract = {This article presents experimental and numerical results of the fabrication of welded plate girders under workshop conditions. Main concerns are the prediction of imperfections with the aid of simulation tools and/or simplified engineering models. Their impact on the component design is evaluated in a case study. Special focus is put on the effect of residual welding stress. For this, different simplified distributions are compared with results from welding simulation. The findings confirm the thesis that present recommendations on the implementation of weld-induced imperfections must be rated conservative. This suggests that it is necessary to establish new models. Guidance on future problems in this context will be given.}, language = {en} } @inproceedings{PasternakKrauscheLaunert, author = {Pasternak, Hartmut and Krausche, Thomas and Launert, Benjamin}, title = {Welded construction site joints in bridges}, series = {Steel Bridges: Innovation \& New Challenges, 8th International Symposium on Steel Bridges, Istanbul, 2015}, booktitle = {Steel Bridges: Innovation \& New Challenges, 8th International Symposium on Steel Bridges, Istanbul, 2015}, publisher = {Turkish Constructional Steelwork Association (TUCSA)}, address = {Istanbul, Turkey}, isbn = {978-605-65900-2-3}, pages = {315 -- 320}, abstract = {In large steel construction, as in steel bridges, construction site welds are made under difficult conditions such as low temperatures and wind. The comprehensive study will show not only test results from the analysis in the climate chamber (large scale test) with low temperatures (-20°C, -10°C) as well as numerical calculations with the help of welding simulation and non-linear structural analysis. Deflections and temperature are given and compared with traditional engineering models and advises for future problems are presented. For bridge girders with I cross sections, welded thick plates are used and there joining need to be considered precisely. Effect from welding, such as deflections and residual stresses, will have an outcome on the performed component. For welding of thick plates multi-layer welding is used. The edges need to be cut before welding. The preparation process needs to be considered as well as actual joining to have an economic performance. As joint geometry the Z-joint was chosen and investigated. Results from testing as well as from the welding simulation will be shown and compared. Thereby an engineering model will be consulted to evaluate the results. To evaluate the impact of the welding process a FEM load capacity calculation was performed and will be compared with test without imperfections from the joining process.}, language = {en} } @book{NitschkePagelKlassenPasternaketal., author = {Nitschke-Pagel, Thomas and Klassen, Jakob and Pasternak, Hartmut and Launert, Benjamin and Krausche, Thomas}, title = {P 858 - Schweißen dicker Bleche unter Baustellenbedingungen - Beurteilung des Einflusses auf das Tragverhalten von Montagest{\"o}ßen}, publisher = {Verlag und Vertriebsgesellschaft mbH}, address = {D{\"u}sseldorf}, isbn = {978-3-942541-69-5}, abstract = {Beim Aufbau großer Stahlstrukturen im Br{\"u}cken- oder Stahlhochbau wird heute vermehrt auf modulare Fabrikfertigung gesetzt. Ein F{\"u}gen dieser Module auf der Baustelle zu einer Gesamtstruktur ist aber weiterhin notwendig. Als F{\"u}geverfahren wird hier h{\"a}ufig das MAG-Mehrlagenschweißen eingesetzt. Gerade an dicken Blechen stellen Baustellenschweißungen nicht nur besondere Anforderungen an den ausf{\"u}hrenden Betrieb, die Bauleitung und Bau{\"u}berwachung, sondern auch an den Konstrukteur. Wichtig f{\"u}r den Konstrukteur ist die Kenntnis der sich durch Schweißungen einstellenden Schrumpfung der Bauteile, der auftretenden Verz{\"u}ge und Eigenspannungen. Gerade bei Baustellenschweißungen m{\"u}ssen diese Aspekte in der Konstruktionsphase der Einzelkomponenten mit ber{\"u}cksichtigt werden, um die erforderlichen Toleranzen bei der Montage einzuhalten. Eine genaue Kenntnis der durch Schweißungen verursachten Ph{\"a}nomene ist in den Konstruktions- und Montagebetrieben oft nur aus mehrj{\"a}hrigen Erfahrungen vorhanden. Ein grundlegendes, vollst{\"a}ndiges Bild der Abl{\"a}ufe beim Schweißen auf der Baustelle, das es erm{\"o}glicht, dieses Wissen auf neue Konstruktionen zu {\"u}bertragen, fehlt bisher. Insbesondere f{\"u}r die immer {\"o}fter im Br{\"u}cken- und Stahlhochbau eingesetzten h{\"o}herfesten Feinkornbaust{\"a}hle (z.B. S460) ist die Kenntnis des Verhaltens bei Baustellenschweißungen notwendig. Hier setzt der Forschungsantrag an. Mit Hilfe der Schweißsimulation k{\"o}nnen die Auswirkungen von Schweißn{\"a}hten, wie die Entstehung von Verz{\"u}gen und Eigenspannungen am Bauteil, global dargestellt werden. Eine anschließende Struktursimulationen (Festigkeits- und Steifigkeitsberechnungen) mit aus der Schweißsimulation integrierten Ergebnissen bildet die Basis f{\"u}r erg{\"a}nzende Untersuchungen. Montagest{\"o}ße sind außerdem durch Verschmutzung und Witterung negativ beeinflusst. Die Montage kann beispielsweise bei niedrigen Temperaturen unterhalb des Gefrierpunkts durchgef{\"u}hrt werden m{\"u}ssen. Diese Situation wurde in einer Klimakammer simuliert und die Auswirkungen der Umgebungstemperatur bei der Montage auf das Tragverhalten der Verbindung untersucht. F{\"u}r die im Rahmen des Vorhabens untersuchten F{\"a}lle ist kein Einfluss variierender Umgebungstemperaturen bis -10 °C auf die resultierenden Schweißeigenspannungen festzustellen. Der Vergleich von Verzug und Eigenspannung gegen{\"u}ber normativ vorgegeben Toleranzwerten sowie vereinfachten Ingenieurmodellen f{\"u}r die Approximation des Eigenspannungsverlaufs zeigt große Defizite. Bei realit{\"a}tsnaher Implementierung der Eigenspannungen in die Traglastberechnung k{\"o}nnen z.T. große Reserven im Rahmen der nichtlinearen Traglastberechnung ausgenutzt werden.}, language = {de} } @misc{PasternakKrausche, author = {Pasternak, Hartmut and Krausche, Thomas}, title = {The Porsche Pavilion in the Autostadt Wolfsburg, Germany}, series = {Procedia Engineering}, journal = {Procedia Engineering}, number = {57}, issn = {1877-7058}, doi = {10.1016/j.proeng.2013.04.010}, pages = {63 -- 69}, language = {en} } @misc{BartholomePasternakFeldmannetal., author = {Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut and Feldmann, Markus and Geßler, Achim and Ummenhofer, Thomas and G{\"o}tz, Frank}, title = {Verst{\"a}rkung von Stahlkonstruktionen durch geklebte CFK-Lamellen}, series = {20. DASt-Forschungskolloquium in Essen, 08./09. M{\"a}rz 2016}, journal = {20. DASt-Forschungskolloquium in Essen, 08./09. M{\"a}rz 2016}, publisher = {Frehner Consulting}, address = {F{\"u}ssen}, isbn = {978-3-941687-19-6}, pages = {89 -- 94}, language = {de} } @inproceedings{BartholomePasternakFeldmannetal., author = {Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut and Feldmann, Markus and Geßler, Achim and Ummenhofer, Thomas and G{\"o}tz, Frank}, title = {Kleben von CFK-Lamellen im Stahlbau}, series = {DVS Congress 2015, Große Schweißtechnische Tagung, N{\"u}rnberg}, booktitle = {DVS Congress 2015, Große Schweißtechnische Tagung, N{\"u}rnberg}, publisher = {DVS Media}, address = {D{\"u}sseldorf}, isbn = {978-3-945023-46-4}, pages = {927 -- 932}, language = {de} } @inproceedings{BartholomePasternakFeldmannetal., author = {Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut and Feldmann, Markus and Geßler, Achim and Ummenhofer, Thomas}, title = {Systematische Untersuchung zur Verst{\"a}rkung von Stahlkonstruktionen mit kohlefaserverst{\"a}rkten Kunststoffen (CFK)}, series = {Tagungsband, 16. Kolloquium Gemeinsame Forschung in der Klebtechnik, K{\"o}ln, M{\"a}rz 2016}, booktitle = {Tagungsband, 16. Kolloquium Gemeinsame Forschung in der Klebtechnik, K{\"o}ln, M{\"a}rz 2016}, publisher = {DECHEMA, Gesellschaft f{\"u}r Chemische Technik und Biotechnologie e.V.}, address = {Frankfurt am Main}, pages = {45 -- 47}, language = {de} } @inproceedings{BartholomePasternakBulkowski, author = {Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut and Bulkowski, Marcin}, title = {Risssanierung von dynamisch beanspruchten Stahlbauteilen mit kohlenfaserverst{\"a}rkten Kunststoffen (CFK-Lamellen)}, series = {DVS Congress 2015, Große Schweißtechnische Tagung, N{\"u}rnberg}, booktitle = {DVS Congress 2015, Große Schweißtechnische Tagung, N{\"u}rnberg}, publisher = {DVS Media}, address = {D{\"u}sseldorf}, isbn = {978-3-945023-46-4}, pages = {597 -- 602}, language = {de} } @misc{PasternakKubieniec, author = {Pasternak, Hartmut and Kubieniec, Gabriel}, title = {Implementation of longitudinal welding stresses into structural calculation of steel structures}, series = {JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT}, volume = {22}, journal = {JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT}, number = {1}, issn = {1392-3730}, doi = {10.3846/13923730.2014.994029}, pages = {47 -- 55}, language = {en} } @misc{PasternakSahellie, author = {Pasternak, Hartmut and Sahellie, Samer}, title = {Conversion factors of the temperature effect on the shear strength of adhesively bonded steel joints}, series = {Journal of civil engineering and management}, volume = {22}, journal = {Journal of civil engineering and management}, number = {5}, issn = {1392-3730}, doi = {10.3846/13923730.2015.1068848}, pages = {666 -- 672}, language = {en} } @inproceedings{LaunertRhodePasternaketal., author = {Launert, Benjamin and Rhode, Michael and Pasternak, Hartmut and Kannengießer, Thomas}, title = {Welding residual stresses in high-strength steel. Experimental results}, series = {The International Colloquium on Stability and Ductility of Steel Structures}, booktitle = {The International Colloquium on Stability and Ductility of Steel Structures}, editor = {Dubina, Dan and Ungureanu, Viorel}, edition = {2016 edition}, publisher = {Ernst \& Sohn}, isbn = {978-92-9147-133-1}, pages = {517 -- 524}, abstract = {This article presents the latest results of an ongoing national research project on improved models for the prediction of welding residual stresses of thick-plated welded I-girders. The experimental program is presented and the importance of different influencing factors on the residual stresses is discussed in detail. All results are compared for mild (S355J2+N) and high strength (S690QL) steel. Finally, conclusions for further works are drawn.}, language = {en} } @inproceedings{CiupackPasternakLedeckyetal., author = {Ciupack, Yvonne and Pasternak, Hartmut and Ledecky, Lukas and Mette, Christoph and Stammen, Elisabeth and Dilger, Klaus}, title = {Adhesive bonded steel structures under cyclic loading}, series = {Proceedings of the METNET Seminar 2015 in Budapest, 2015}, booktitle = {Proceedings of the METNET Seminar 2015 in Budapest, 2015}, editor = {Virdi, Kuldeep and Tenhunen, Lauri}, publisher = {HAMK University of Applied Sciences}, address = {H{\"a}meenlinna}, isbn = {978-951-784-762-9}, pages = {90 -- 101}, language = {en} } @inproceedings{StojkovićLedeckyCiupacketal., author = {Stojković, Nenad and Ledecky, Lukas and Ciupack, Yvonne and Pasternak, Hartmut and Mette, Christoph and Stammen, Elisabeth and Dilger, Klaus}, title = {Tensile strength of adhesively bonded fa{\c{c}}ade joints}, series = {The Sixth International Conference Civil Engineering - Science \& Practice, Montenegro, 2016}, booktitle = {The Sixth International Conference Civil Engineering - Science \& Practice, Montenegro, 2016}, isbn = {978-86-82707-30-1}, pages = {273 -- 280}, language = {en} } @inproceedings{JaegerPasternak, author = {J{\"a}ger, A. and Pasternak, Hartmut}, title = {Grundlegende Studien zum Beulverhalten von engringversteiften Kreiszylinderschalen unter Axialdruck}, series = {Offen im Denken, 20. DASt-Forschungskolloquium in Essen, 08./09. M{\"a}rz 2016}, booktitle = {Offen im Denken, 20. DASt-Forschungskolloquium in Essen, 08./09. M{\"a}rz 2016}, publisher = {Deutscher Ausschuß f{\"u}r Stahlbau DASt}, address = {D{\"u}sseldorf}, isbn = {978-3-941687-19-6}, pages = {38 -- 42}, language = {de} } @inproceedings{LedeckyStojkovićCiupacketal., author = {Ledecky, Lukas and Stojković, Nenad and Ciupack, Yvonne and Pasternak, Hartmut and Mette, Christoph and Fischer, Vitali and Stammen, Elisabeth and Dilger, Klaus}, title = {Service loading and fatigue behavior of adhesively bonded steel-steel fa{\c{c}}ade joints}, series = {16th International Scientific Conference VSU 2016, Sofia, 2016, vol. 1}, booktitle = {16th International Scientific Conference VSU 2016, Sofia, 2016, vol. 1}, publisher = {VSU}, address = {Sofia}, pages = {187 -- 192}, language = {en} } @inproceedings{PasternakLaunertKannengiesseretal., author = {Pasternak, Hartmut and Launert, Benjamin and Kannengießer, Thomas and Rhode, Michael}, title = {Residual stresses and imperfections in welded high-strength I-shape members}, series = {Insights and Innovations in Structural Engineering, Mechanics and Computation, Proceedings of the Sixth International Conference on Structural Engineering, Mechanics and Computation, Cape Town, South Africa, 5-7 September 2016}, booktitle = {Insights and Innovations in Structural Engineering, Mechanics and Computation, Proceedings of the Sixth International Conference on Structural Engineering, Mechanics and Computation, Cape Town, South Africa, 5-7 September 2016}, editor = {Zingoni, Alphose}, publisher = {Taylor \& Francis}, address = {London}, isbn = {978-1-138-02927-9}, pages = {403 -- 404}, abstract = {This article addresses the imperfections caused by the weld assembly in I-shape sections made of two structural steel grades. Load influencing imperfections are assumed as deviations from the ideal shape (e.g. bending distortion) and longitudinal residual stresses. The quality of a numerically aided design of components exposed to either compression and/or bending is significantly affected, depending on these parameters [1]. The Eurocode provides robust simplified models. As a result, the Ultimate Limit State (ULS) is approached on a conservative basis. The following investigations are aimed at providing further guidance on these values in component-like specimens. The long term goal is an improved understanding of the load-bearing capacity of such sections. As a first step in this process, the experimental and corresponding numerical studies are presented.}, language = {en} } @inproceedings{PasternakKrausche, author = {Pasternak, Hartmut and Krausche, Thomas}, title = {Details of the steel assembly of a membrane-cladded double ­ curved cable net roof}, series = {ICCAEE 2016 Kuala Lumpur/Malaysia, 2nd International Congress on Technology - Engineering \& Science}, booktitle = {ICCAEE 2016 Kuala Lumpur/Malaysia, 2nd International Congress on Technology - Engineering \& Science}, publisher = {University of Malaysia}, address = {Pahang}, language = {en} } @misc{BartholomePasternakFeldmannetal., author = {Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut and Feldmann, Markus and Geßler, Achim and Ummenhofer, Thomas and Ruff, Daniel}, title = {Alternative Verst{\"a}rkungsmaßnahme im Stahlbau mit aufgeklebten unidirektionalen CFK-Lamellen}, series = {Schweißen und Schneiden}, volume = {68}, journal = {Schweißen und Schneiden}, number = {8}, issn = {0036-7184}, pages = {490 -- 499}, language = {de} } @misc{JaegerPasternak, author = {J{\"a}ger, Andreas and Pasternak, Hartmut}, title = {Studien zum Beulverhalten von eng ringversteiften Kreiszylinderschalen unter Axialdruck}, series = {Bauingenieur}, volume = {91}, journal = {Bauingenieur}, number = {10}, issn = {0005-6650}, pages = {401 -- 409}, language = {de} } @misc{BartholomePasternakFeldmannetal., author = {Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut and Feldmann, Markus and Geßler, Achim and Ummenhofer, Thomas and Ruff, Daniel}, title = {Geklebte CFK-Lamellen verst{\"a}rken Stahlbauteile}, series = {Adh{\"a}sion}, volume = {60}, journal = {Adh{\"a}sion}, number = {9}, issn = {1619-1919}, pages = {42 -- 49}, language = {de} } @misc{BartholomePasternak, author = {Bartholom{\´e}, Susanne Elisabeth and Pasternak, Hartmut}, title = {Tr{\"a}ger mit schlanken, wabenf{\"o}rmig strukturierten Stegen - Versuch und Simulation}, series = {Stahlbau}, volume = {85}, journal = {Stahlbau}, number = {11}, issn = {1437-1049}, doi = {10.1002/stab.201610423}, pages = {724 -- 732}, language = {de} } @inproceedings{LaunertRhodeKrommetal., author = {Launert, Benjamin and Rhode, Michael and Kromm, Arne and Pasternak, Hartmut and Kannengießer, Thomas}, title = {Residual Stress Influence on the Flexural Buckling of Welded I-Girders}, series = {Residual Stresses 2016 - ICRS-10}, booktitle = {Residual Stresses 2016 - ICRS-10}, editor = {Holden, Thomas M. and Mur{\´a}nsky, Ondrej and Edwards, Lyndon}, publisher = {Materials Research Forum LLC}, address = {Millersville, PA}, isbn = {978-1-94529116-6}, doi = {10.21741/9781945291173-19}, pages = {109 -- 114}, abstract = {The nonlinear analysis became a common tool to precisely assess the load-bearing behavior of steel beam and column members. The failure level is significantly influenced by different types of imperfections, among geometric also structural imperfections (residual stresses). Here are still gaps in the knowledge. Nowadays, 3-D welding simulation developed to a level where it could provide reliable estimation of weld-induced distortion and residual stresses. Nevertheless, modelling and computational effort are still in a less practicable range. In this study a simplified procedure to implement residual welding stresses in continuous large scale members is proposed and the influence on the ultimate limit state of slender members in compression is evaluated for two common structural steel grades. The results showed significant improvements in the utilization of load bearing capacity compared with simplified design methods. The comparatively general approach in this study offers potential for future optimization.}, language = {en} } @inproceedings{KrommRhodeLaunertetal., author = {Kromm, Arne and Rhode, Michael and Launert, Benjamin and Dixneit, Jonny and Kannengießer, Thomas and Pasternak, Hartmut}, title = {Combining Sectioning Method and X-Ray Diffraction for Evaluation of Residual Stresses in Welded High Strength Steel Components}, series = {Residual Stresses 2016 - ICRS-10}, booktitle = {Residual Stresses 2016 - ICRS-10}, editor = {Holden, Thomas M. and Mur{\´a}nsky, Ondrej and Edwards, Lyndon}, publisher = {Materials Research Forum LLC}, address = {Millersville, PA}, isbn = {978-1-94529116-6}, doi = {10.21741/9781945291173-28}, pages = {163 -- 168}, abstract = {Residual stresses and distortions in welded I-girders for steel construction are relevant when evaluating the stability of steel beams and column members. The application of high strength steels allows smaller wall thicknesses compared to conventional steels. Therefore, the risk of buckling has to be considered carefully. Due to the lack of knowledge concerning the residual stresses present after welding in high strength steel components conservative assumptions of their level and distribution is typically applied. In this study I-girders made of steels showing strengths of 355 MPa and 690 MPa were welded with varying heat input. Due to the dimension of the I-girders and the complex geometry the accessibility for residual stress measurement using X-ray diffraction was limited. Therefore, saw cutting accompanied by strain gauge measurement has been used to produce smaller sections appropriate to apply X-ray diffraction. The stress relaxation measured by strain gauges has been added to residual stresses determined by X-ray diffraction to obtain the original stress level and distribution before sectioning. The combination of both techniques can produce robust residual stress values. From practical point of view afford for strain gauge application can be limited to a number of measuring positions solely to record the global amount of stress relaxation. X-ray diffraction can be applied after sectioning to determine the residual stresses with sufficient spatial resolution.}, language = {en} } @misc{LaunertSzczerbaGajewskietal., author = {Launert, Benjamin and Szczerba, Radosław and Gajewski, Marcin and Rhode, Michael and Pasternak, Hartmut and Giżejowski, Marian}, title = {The buckling resistance of welded plate girders taking into account the influence of post-welding imperfections - Part 1: Parameter study}, series = {Materials Testing}, volume = {59}, journal = {Materials Testing}, number = {1}, issn = {0025-5300}, doi = {10.3139/120.110964}, pages = {47 -- 56}, abstract = {Welding is the most important joining technique and offers the advantage of customizable plate thicknesses. On the other hand, welding causes residual stresses and deformations influencing the load carrying capacity. Their consideration in the design requires simple and fast models. Though welding simulation has contributed to accurately access to these values nowadays, their application to large components remains still in a less practicable range. Nevertheless, many studies emphasized the need to make corrections in recently available simplified models. Especially the influence of residual stresses seems somewhat overestimated in many cases if comparing conventional structural steel S355 and high-strength steel S690. In times of computer-aided design, an improved procedure to implement weld-inducted imperfections appears overdue. This will be presented in two parts. The first part illustrates the potential influence of post-welding imperfections exemplified for weak axis buckling in comparison with the general method in accordance with Eurocode 3. Residual stresses and initial crookedness were varied systematically in order to produce a scatter band of capacities. An approach to characterize the borders of these imperfections was undertaken before that. The excessive scattering of reduction factors for the load bearing capacity demonstrates the importance of these variables. Results were finally evaluated against advanced simulation models which will be further detailed in part two of this contribution.}, language = {en} } @misc{LaunertRhodeKrommetal., author = {Launert, Benjamin and Rhode, Michael and Kromm, Arne and Pasternak, Hartmut and Kannengießer, Thomas}, title = {Measurement and numerical modeling of residual stresses in welded HSLA component-like I-girders}, series = {Welding in the World}, volume = {61}, journal = {Welding in the World}, number = {2}, issn = {0043-2288}, doi = {10.1007/s40194-016-0413-x}, pages = {223 -- 229}, abstract = {The present contribution shows the residual stress results obtained from experiments with the sectioning method in comparison to global (structural) welding simulation models on component-like (i.e., large scale) I-girders made of structural steel grades S355 and S690QL. Plates were welded by conventional gas metal arc welding using two different heat inputs. In addition, the base material was assumed to be approximately stress-free. Based on these results, conclusions and recommendations for the design of welded I-girders are drawn.}, language = {en} } @misc{LoebjinskiRugPasternak, author = {Loebjinski, Maria and Rug, Wolfgang and Pasternak, Hartmut}, title = {Zuverl{\"a}ssigkeitsbewertung von Holzbauteilen im Bestand}, series = {Bauingenieur}, volume = {92}, journal = {Bauingenieur}, number = {2}, issn = {0005-6650}, pages = {65 -- 73}, abstract = {Die aktuellen Bemessungsnormen des Eurocodes beinhalten keine gesonderten Regelungen f{\"u}r bestehende Bauwerke. Dennoch sind diese aus verschiedenen Gr{\"u}nden spezifisch zu bemessen. Dazu geh{\"o}ren sowohl {\"o}ko-nomische Gr{\"u}nde, als auch Anforderungen an die Erhaltung von historischen Konstruktionen. Dieser Beitrag fasst Grundlagen zur Zuverl{\"a}ssigkeitstheorie und zur Ermittlung von Teilsicherheitsbeiwerten zusammen, stellt den aktuellen Stand der Technik zu Normen und Standards der zuverl{\"a}ssigkeitstheoretischen Bemessung und zur Behandlung von Bestandsbauten in der Bemessung dar und zeigt mit vereinfachten Rechnungen das Opti-mierungspotential der Teilsicherheitsbeiwerte f{\"u}r historische Holzkonstruktionen auf.}, language = {de} } @inproceedings{CiupackPasternak, author = {Ciupack, Yvonne and Pasternak, Hartmut}, title = {Bonding Technology in Steel Structures, a Summary of Research Activities at Chair of Steel and Timber Structures}, series = {Proceedings of the METNET Seminar 2016 in Castellon}, booktitle = {Proceedings of the METNET Seminar 2016 in Castellon}, editor = {Virdi, Kuldeep and Tenhunen, Lauri}, address = {H{\"a}meenlinna}, isbn = {978-951-784-784-1}, pages = {19 -- 30}, language = {en} } @misc{PasternakLaunertKannengiesseretal., author = {Pasternak, Hartmut and Launert, Benjamin and Kannengießer, Thomas and Rhode, Michael}, title = {Advanced Residual Stress Assessment of Plate Girders Through Welding Simulation}, series = {Procedia Engineering}, volume = {172}, journal = {Procedia Engineering}, issn = {1877-7058}, doi = {10.1016/j.proeng.2017.02.013}, pages = {23 -- 30}, abstract = {This article provides an impression on potentials in applying nowadays welding simulation tools in construction design. This is carried out exemplary on plate girders from two structural steel grades. The calculated residual stresses are compared with measurements by sectioning method. It has been repeatedly stated that present Eurocode models fail to approximate the residual stresses. Especially for high strength steel (HSS) only limited information is available on realistic occurring residual stresses in typical I-girders. The investigations are aimed to give further guidance on these values. A few proposals on advanced models are discussed.}, language = {en} } @misc{KemperLedeckyFeldmannetal., author = {Kemper, Frank and Ledecky, Lukas and Feldmann, Markus and Pasternak, Hartmut and Fischer, Vitali}, title = {Zeitabh{\"a}ngige Windbeanspruchungen von geklebten Fassadenanschl{\"u}ssen}, series = {Bauingenieur}, volume = {92}, journal = {Bauingenieur}, number = {3}, issn = {1436-4867}, pages = {115 -- 122}, abstract = {F{\"u}r die Bemessung lastabtragender Klebverbindungen im Fassadenbereich ist zu beachten, dass die Windbelastungen auf den Bauwerksoberfl{\"a}chen sowohl zeitlich als auch r{\"a}umlich ver{\"a}nderlich sind. W{\"a}hrend f{\"u}r {\"u}bliche Fassadenanschl{\"u}sse eine Bemessung mit charakteristischen Extremwerten ausreichend ist, muss beim Einsatz von sowohl h{\"o}hermoduligen (z.B. Acrylat) als auch niedrigmoduligen (z.B. Polyurethan) Klebstoffen, die beide ein zeit- und temperaturabh{\"a}ngiges Materialverhalten aufweisen, eine vollst{\"a}ndige Beschreibung dieser zeitbezogenen Lasteinwirkungen erfolgen. Nur dadurch wird letztlich die erforderliche betriebsfeste Auslegung eines geklebten Fassadenanschlusses erm{\"o}glicht. Im vorliegenden Beitrag wird die Ermittlung von zeitbezogenen Lasteinwirkungen und die Berechnung der daraus resultierenden Beanspruchungs-Zeit-Funktionen infolge einer nat{\"u}rlichen Windeinwirkungen auf Basis von Windkanalversuchen und Windstatistik thematisiert. Anhand geeigneter Z{\"a}hlverfahren und unter Ber{\"u}cksichtigung von klebstoffspezifischen Materialeigenschaften wird exemplarisch aufgezeigt, inwiefern unterschiedliche Fassadenpositionen und Windeigenschaften f{\"u}r die Auslegung von geklebten Fassadenanschl{\"u}ssen von Bedeutung sind.}, language = {de} } @inproceedings{SimonMoradiHildebrandetal., author = {Simon, Flaviu and Moradi, Milad and Hildebrand, J{\"o}rg and Pasternak, Hartmut}, title = {The influence of the welding sequence on the load bearing capacity and stress distribution of square hollow section steel joints}, series = {Simulationsforum 2016, Schweißen und W{\"a}rmebehandlung, Weimar, Tagungsband 08.-10. November 2016}, booktitle = {Simulationsforum 2016, Schweißen und W{\"a}rmebehandlung, Weimar, Tagungsband 08.-10. November 2016}, editor = {Hildebrand, J{\"o}rg and Loose, Tobias and Reich, Michael}, publisher = {Verein zur F{\"o}rderung der numerischen Analyse der W{\"a}rmebehandlungs- und Schweißprozesse e.V.}, address = {Weimar}, isbn = {978-3-00-054805-5}, pages = {176 -- 187}, abstract = {The aim of this contribution is to investigate the influence of welding sequencing patterns on the load bearing capacity of a S355 steel square hollow section (SHS) T-Joint. The failure and the joint behavior under loading condition are analyzed. The FE-software SYSWELD v2014 is used for the thermo-mechanical simulation of the welding process. The type of welding process used is metal active gas (MAG) welding. A fillet weld with a throat thickness of 5 mm is performed. After the welding simulation, the results in terms of stresses and distortion are validated with the experimental data. Due to the geometrical characteristics of this type of joint, a compressive test is performed. A load is applied on the upper surface the vertical member (brace). The force-displacement behavior is plotted and discussed. The differences and influencing parameters are identified. The model is prepared for the subsequent sensitivity study which will be done in the software OptiSLang, which is developed by Dynardo GmbH.}, language = {en} } @inproceedings{ShlychkovaPasternak, author = {Shlychkova, Darita and Pasternak, Hartmut}, title = {Numerical analysis of lightweight structured sandwich beams made of steel}, series = {16th International Scientific Conference VSU 2016, Sofia, 2016, vol. 1}, booktitle = {16th International Scientific Conference VSU 2016, Sofia, 2016, vol. 1}, publisher = {VSU}, address = {Sofia}, pages = {318 -- 323}, abstract = {Using a special technology it is possible to produce thin "honeycomb" structured plates. Such plates have been used e.g. for the roof of the sport complex "Olimp" in Odessa. That roof gives an extraordinary impression. That is why the question: how do structured plates behave as beams with C-section under concentrated force in the middle of the upper flange? In an ongoing project, two of those structured plates were assembled in different ways trough point welding. "Sandwich" beams were modelled and calculated using the nonlinear finite elements. Using Abaqus software load deformation curves for each beam and local stability were analyzed. Those sandwich beams may be used in exhibition stand construction.}, language = {en} } @inproceedings{LedeckyCiupackPasternaketal., author = {Ledecky, Lukas and Ciupack, Yvonne and Pasternak, Hartmut and Fischer, Vitali and Stammen, Elisabeth and Dilger, Klaus}, title = {Untersuchungen zum Tragverhalten und der Lebensdauer von Klebverbindungen im Stahlbau unter zyklischen Belastungen (LebKleb)}, series = {17. Kolloquium Gemeinsame Forschung in der Klebtechnik, Tagungsband, 14. - 15. Februar 2017}, booktitle = {17. Kolloquium Gemeinsame Forschung in der Klebtechnik, Tagungsband, 14. - 15. Februar 2017}, publisher = {DECHEMA}, address = {Frankfurt am Main}, pages = {37 -- 38}, language = {de} } @inproceedings{LedeckyCiupackPasternaketal., author = {Ledecky, Lukas and Ciupack, Yvonne and Pasternak, Hartmut and Mette, Christoph and Stammen, Elisabeth and Dilger, Klaus}, title = {Untersuchungen zum Tragverhalten und der Lebensdauer von Klebverbindungen im Stahlbau unter zyklischen Belastungen (LebKleb)}, series = {16. Kolloquium Gemeinsame Forschung in der Klebtechnik, K{\"o}ln, 2016}, booktitle = {16. Kolloquium Gemeinsame Forschung in der Klebtechnik, K{\"o}ln, 2016}, publisher = {DECHEMA}, address = {Frankfurt am Main}, pages = {39 -- 41}, language = {de} } @misc{CiupackPasternakMetteetal., author = {Ciupack, Yvonne and Pasternak, Hartmut and Mette, Christoph and Stammen, Elisabeth and Dilger, Klaus}, title = {Adhesive bonding in steel construction - Challenge and innovation}, series = {Procedia Engineering}, volume = {172}, journal = {Procedia Engineering}, issn = {1877-7058}, doi = {10.1016/j.proeng.2017.02.048}, pages = {186 -- 193}, language = {en} } @inproceedings{LiPasternak, author = {Li, Zheng and Pasternak, Hartmut}, title = {Development of a stochastic material model at constant stress distribution in steel construction}, series = {16th International Scientific Conference VSU 2016, Sofia, 2016, vol. 1}, booktitle = {16th International Scientific Conference VSU 2016, Sofia, 2016, vol. 1}, publisher = {VSU}, address = {Sofia}, pages = {193 -- 198}, abstract = {This paper briefly presents the results of theoretical and experimental investigations on the size effect in metal. The Chain of Bundle Model, which is based on a stochastic material model by Weibull and log-normal distribution, will be developed and the possibility to approximately determine the parameter ξ of the model is given. The tests were performed on specimens from the same steel with different sizes. According to the experiments, the relationship between the sizes of the specimens and the strength can be analyzed through probability- and reliability theory. The theoretical and experimental results show that if the volume increases hundredfold, the strength will be reduced to 90\% ~ 95\%. Therefore, the size effect plays an unnegligible role in steel construction.}, language = {en} } @inproceedings{PasternakKrausche, author = {Pasternak, Hartmut and Krausche, Thomas}, title = {A special Construction Site: the Guyed Mast at Torfhaus in the Harz Mountains, Germany}, series = {Risk and Safety Engineering, 12th International Conference, Kopaonik, 2017}, booktitle = {Risk and Safety Engineering, 12th International Conference, Kopaonik, 2017}, publisher = {The Higher Education Technical School of Professional Studies}, address = {Novi Sad}, isbn = {978-86-6211-107-4}, pages = {540 -- 545}, language = {en} } @misc{LinkeRugPasternak, author = {Linke, Gunter and Rug, Wolfgang and Pasternak, Hartmut}, title = {Festigkeitssortierung von Bauholz in historischen Geb{\"a}uden - Bericht zum Stand der Technik}, series = {Bauingenieur}, volume = {92}, journal = {Bauingenieur}, number = {5}, pages = {229 -- 236}, language = {de} } @misc{StojkovićFolićPasternak, author = {Stojković, Nenad and Folić, Radomir and Pasternak, Hartmut}, title = {Mathematical model for the prediction of strength degradation of composites subjected to constant amplitude fatigue}, series = {International Journal of Fatigue}, volume = {103}, journal = {International Journal of Fatigue}, issn = {0142-1123}, doi = {10.1016/j.ijfatigue.2017.06.032}, pages = {478 -- 487}, language = {en} } @techreport{LaunertPasternakRhodeetal., author = {Launert, Benjamin and Pasternak, Hartmut and Rhode, Michael and Kromm, Arne and Kannengießer, Thomas}, title = {Erh{\"o}hung der Tragf{\"a}higkeit geschweißter I-Tr{\"a}ger aus hochfestem Baustahl durch verbesserte Ans{\"a}tze zur Ber{\"u}cksichtigung von Eigenspannungen}, pages = {4}, language = {de} } @misc{LaunertPasternak, author = {Launert, Benjamin and Pasternak, Hartmut}, title = {Weld residual stresses effects in the design of welded plate girders: Simulation and Implementation}, series = {Ce/papers}, volume = {1}, journal = {Ce/papers}, number = {2-3}, issn = {2509-7075}, doi = {10.1002/cepa.144}, pages = {1039 -- 1047}, abstract = {Eurocode 3 offers different possibilities on a numerically-aided design of welded plate girders. In this, a geometrically and materially nonlinear analysis of the imperfect structure (GMNIA) provides the theoretically highest possible degree of realism. A correct implementation of "imperfections" is of critical importance in the practical application of this method. The current design rules are based on long term experience in terms of traditional ("old") welding procedures and regular ("low strength") steel grades. Thus, they provide very approximate (but safe) rules for these structures. With the introduction of modern shop welding operations and materials, many of these assumptions seem to be over-conservative. A revision of these rules is being processed in different national and international research projects. This particular study focusses on the weld residual stresses and their effects in conventional steel S355 and high strength steel S690. Metal active gas (MAG) welding under shop welding conditions was used. The measurement of weld residual stresses on component-like samples (carried out by the BAM Bundesanstalt f{\"u}r Materialforschung und -pr{\"u}fung in Berlin) has been widely published. The hereupon based (simplified) welding simulation as part of a subsequent structural analysis is shown here. A novel numerical approach how to directly incorporate the results into large structural components models is presented. The capacity analysis is performed on a simple example for weak-axis buckling. The results indicate significant improvements in the utilization of load-bearing capacity and underline the superior buckling assignment for the S690 compared to conventional S355. The experimental validation of the findings is currently being prepared.}, language = {en} } @misc{KrauscheLaunertPasternak, author = {Krausche, Thomas and Launert, Benjamin and Pasternak, Hartmut}, title = {A study on the prediction of welding effects in steel box girders}, series = {Ce/papers}, volume = {1}, journal = {Ce/papers}, number = {2-3}, issn = {2509-7075}, doi = {10.1002/cepa.500}, pages = {4410 -- 4416}, abstract = {For standard sections including I-girders and rectangular box girders, several approaches on geometrical and structural imperfections are given in the literature, which can be implemented in a numerical analysis. For complex sections, as found in many of today's lightweight roof structures, these assumptions are conservative due to the sections typically unique shape, which leads to increased thicknesses or additional stiffening of the plates. This, on the other hand, can significantly affect fabrication costs. This paper aims to provide an overview on the possibilities in the numerical prediction of weld residual stresses and weld-induced deformations for these sections. The obtained values can be used in a subsequent numerical analysis to understand the structural behavior and optimize the design. A representative example on a section used in a steel compression ring is described and analyzed using the numerical welding simulation. A simplification of the originally transient weld procedure is used in order to reduce computation times to a practically reasonable level. In this context, the Abaqus Welding Interface (AWI) helps to automate working steps in conjunction with the definition of weld passes and their sequencing, which shall be shown in here. The applicability of this method is discussed showing also a need of further investigations in this field. This is especially with regard to result quality, which requires some experimental back-up. Nonetheless, this method could already help to show up tendencies or to identify potential critical spots in the design.}, language = {en} } @misc{CiupackLedeckyPasternaketal., author = {Ciupack, Yvonne and Ledeck{\´y}, Luk{\´a}š and Pasternak, Hartmut and Fischer, Vitali and Stammen, Elisabeth and Dilger, Klaus}, title = {Bonded steel joints under cyclic loading: Study on structural behaviour and fatigue}, series = {ce/papers}, volume = {1}, journal = {ce/papers}, number = {2/3}, issn = {2509-7075}, doi = {10.1002/cepa.87}, pages = {505 -- 513}, language = {en} } @inproceedings{LiPasternak, author = {Li, Zheng and Pasternak, Hartmut}, title = {Reliability analysis of size effect on flexural members with stochastic finite element method}, series = {12th International Conference on Structural Safety \& Reliability, Vienna, Austria, 6-10 August 2017}, booktitle = {12th International Conference on Structural Safety \& Reliability, Vienna, Austria, 6-10 August 2017}, editor = {Bucher, Christian and Ellingwood, Bruce R. and Frangopol, Dan M.}, publisher = {TU-MV Media Verlag}, address = {Vienna}, isbn = {978-3-903024-28-1}, language = {en} } @inproceedings{LoebjinskiRugPasternak, author = {Loebjinski, Maria and Rug, Wolfgang and Pasternak, Hartmut}, title = {Approaches for an optimisation of partial safety factors for historic timber structures}, series = {Safety, Reliability, Risk, Resilience and Sustainability of Structures and Infrastructure, 12th International Conference on Structural Safety \& Reliability, Vienna, Austria, 6-10 August 2017}, booktitle = {Safety, Reliability, Risk, Resilience and Sustainability of Structures and Infrastructure, 12th International Conference on Structural Safety \& Reliability, Vienna, Austria, 6-10 August 2017}, editor = {Bucher, Christian and Ellingwood, Bruce R. and Frangopol, Dan M.}, publisher = {TU-MV Media Verlag}, address = {Vienna}, isbn = {978-3-903024-28-1}, language = {en} } @inproceedings{PasternakKrausche, author = {Pasternak, Hartmut and Krausche, Thomas}, title = {Design, constructions and assembly of two membrane-cladded double-curved cable net roofs}, series = {6th Structural Engineers World Congress (SEWC 2017), Cancun/Mexico}, booktitle = {6th Structural Engineers World Congress (SEWC 2017), Cancun/Mexico}, publisher = {Universidad Nacional Aut{\´o}noma de M{\´e}xico - UNAM}, pages = {8}, abstract = {For stadium roofs light weight constructions, that are tensioned between a cantilevering steel compression ring, are commonly build around the globe, mostly for social events like sport games and concerts. They allow having no columns in the viewing area and also spanning the whole arena. With the additional use of membranes as the roof shell, the inside of the building will get naturally lighted. With the knowledge of the occurring loads, an economic structure can be found to optimize the edge structure. Frequently the form finding process will use the death loads as decisive action because for only one load case a moment free form can be determined. Other load cases will cause bending in the girder. The process also allows having only supports at the low points and a cantilever arises. These types of roofs will be compared with two exemplary canopies in Germany. The main focus will be on the assembly of the edge girder, which will evoke challenges for planning as well as the actual manufacturing process. The steel edge girder is double curved and has a spatially shape. The welded box exists of 4 to 5 curving plates that have thicknesses from 15mm to 55mm and will vary in their height. Due to welding residual stresses occur during the assembly in the factory as well as on the construction side. For the design of the girders, the residual stresses need to be determined. The identified results of the residual stresses will vary through the plate thickness and will differ for residual longitudinal and residual transverse stresses. The longitudinal residual stresses, as the relevant residual stresses for axial forces, will be farther scrutinized. Due to its complex geometry the challenges of the simulation will be presented for the manufacturing process and the construction site assembly. For the farther investigation the calculated stresses will be taken for a load capacity calculation of a section of the edge girder. Due to the forming geometry and the welding process, both effects need to be considered. This calculation will also show that the edge girder needs to be stiffened in the inside with bulkhead plate's und longitudinal stiffeners. Both authors are involved in the verification of the objects (Customer Centre in the Autostadt Wolfsburg-CC, Schierke-Arena -FA in the Harz Mountains) mentioned below.}, language = {en} } @inproceedings{KrauscheLaunertPasternak, author = {Krausche, Thomas and Launert, Benjamin and Pasternak, Hartmut}, title = {Welding effects in unregularly steel box girders}, series = {6th Structural Engineers World Congress (SEWC 2017), Cancun/Mexico}, booktitle = {6th Structural Engineers World Congress (SEWC 2017), Cancun/Mexico}, publisher = {Universidad Nacional Aut{\´o}noma de M{\´e}xico - UNAM}, pages = {6}, abstract = {Several approaches on geometrical and structural imperfections are given in the literature for I sections and rectangular box girders. Those approximations of the residuals stress state can be implemented into the structural analysis using multi-purpose FEM program packages. The knowledge of the stress state of free forming cross sections has still to be determined. To fulfil a safe design, the assumptions mostly will be very conservative due to the lack of the assumed stress state. This will result directly to increased thicknesses or additional stiffening of the plates. Not only the material cost will rise, but also the fabrication costs like welding will be affected. This paper aims to provide an overview on the possibilities in the numerical prediction of weld residual stresses and weld induced deformations for cross sections with unique shapes. With the obtained values the tendencies of the residual stress state and deformations will be used to optimize the design. A representative example on a section used in a steel compression ring of a realized roof is described and analyzed using a simplification of a numerical welding simulation. The reduced simulation of the originally transient weld procedure was held to a practically reasonable level and can be reproduced for similar problems. The calculations used the Abaqus Welding Interface (AWI) to automate working steps in conjunction with the definition of weld passes and their sequencing. The field of the method that is discussed also a need of further investigations to prove its applicability. Some experimental back up is requires to verify the result quality. Nonetheless, this method could already help to show up tendencies or to identify potential critical spots in the design.}, language = {en} } @inproceedings{PasternakJaegerCanas, author = {Pasternak, Hartmut and J{\"a}ger-Ca{\~n}{\´a}s, Andreas}, title = {On the axial buckling of very thin-walled cylindrical shells}, series = {Ce/papers : the online collection for conference papers in civil engineering}, volume = {1}, booktitle = {Ce/papers : the online collection for conference papers in civil engineering}, number = {2-3}, issn = {2509-7075}, doi = {10.1002/cepa.127}, pages = {868 -- 877}, abstract = {Major advances in the buckling analysis of cylindrical shells have been achieved in the last two decades. Eurocode nowadays provides rules for tanks up to r/t = 5000. However, since only few literature has become available in the past, dealing specifically with very thin walled shells in the range between r/t = 1500 and r/t = 10000, code provisions either are quite conservative or, in case of r/t > 5000, do barely exist. Employing modern construction methods, close-to perfect, very thin-walled shells can be built that are out of the scope of the design codes. Therefore, to achieve more economical designs and a better sustainability, sophisticated design tools have to be used. In this paper, modifications and extensions of the current design procedure are proposed to overcome current limitations and drawbacks. A review of experiments with a special focus on cylinders with high r/t-ratios was conducted and modified lower bound approximation curves for the knock-down factor α deduced. They were checked against representative experiments from literature. Test results recalculated using an axisymmetric imperfection to explore their equivalent imperfection depth, proved that even small imperfections drastically reduce the buckling strength. Using a parametric study, the result range of α was extended up to r/t = 10000. The design proposal could be approved and an equation for the determination of an equivalent imperfection depth that relates the dependence of α to the imperfection depth and the r/t-ratio is proposed.}, language = {en} } @inproceedings{JaegerCanasPasternak, author = {J{\"a}ger-Ca{\~n}{\´a}s, Andreas and Pasternak, Hartmut}, title = {Influence of closely spaced ring-stiffeners on the axial buckling behavior of cylindrical shells}, series = {Ce/papers : the online collection for conference papers in civil engineering}, volume = {1}, booktitle = {Ce/papers : the online collection for conference papers in civil engineering}, number = {2-3}, issn = {2509-7075}, doi = {10.1002/cepa.133}, pages = {928 -- 937}, abstract = {Material efficiency in modern tank constructions often is achieved by combining thin plates with light and heavy ring stiffeners. While the plates are designed to resist hydrostatic pressure, the stiffeners are designed against wind and external pressure. Axial buckling may occur due to high roof loads and wind since very thin plates are prone to a loss of stability. Test results in the 60s and 70s revealed that closely spaced ring-stiffeners may greatly enhance the axial buckling behavior, allowing for knock-down factors greater unity. However, until today, no design procedure is available allowing for adopting the beneficial effect of ring stiffeners under axial compression into practical design. In this paper a design procedure is proposed that closes this gap in current design codes. One outcome of the conducted literature study revealed that test results of unstiffened shells may be more closely approximated and is shortly presented. The design procedure for ring-stiffened shells was then developed from lower bound curves deduced from categorized buckling tests. The results of a parametrical study, that was conducted over a wide range of r/t-values, is presented. Imperfection depths up to 10t were examined using a stiffener spacing of one buckling half-wave. Especially highly slender stiffened cylinders benefit from ring-stiffening, showing up to 380\% strength gains. Imperfection depths proposed by the current design code were found to be too conservative.}, language = {en} }