TY - JOUR A1 - Korzen, Manfred A1 - Haupt, P. A1 - Tsakmakis, Ch. T1 - Über Verfestigungsmodelle der Plastizitätstheorie in funktionaler Darstellung PY - 1987 SN - 0044-2267 SN - 0946-8463 VL - 67 IS - 4 SP - T 193 EP - T 194 PB - Wiley-VCH CY - Potsdam AN - OPUS4-12082 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Über nichtlineare Viskoelastizität auf der Grundlage von Maßstabsfunktionen T2 - Jahrestagung der Deutschen Rheologischen Gesellschaft CY - Darmstadt, Germany DA - 1989-04-19 PY - 1989 AN - OPUS4-6757 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Korzen, Manfred A1 - Haupt, P. T1 - Über eine Materialgleichung vom viskoelastisch-plastischen Typ PY - 1988 SN - 0044-2267 SN - 0946-8463 VL - 68 IS - 4 SP - T 203 EP - T 204 PB - Wiley-VCH CY - Potsdam AN - OPUS4-12081 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Haupt, P. T1 - Über eine Materialgleichung vom viskoelastisch-plastischen Typ T2 - Jahrestagung der GAMM CY - Stuttgart, Germany DA - 1987-04-14 PY - 1987 AN - OPUS4-6765 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Tsakmakis, Ch. T1 - Zur Beschreibung des Ratchetting-Effektes T2 - Jahrestagung der GAMM CY - Karlsruhe, Germany DA - 1989-03-31 PY - 1989 AN - OPUS4-6760 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Haupt, P. T1 - Verfestigungmodelle der Plastizitätstheorie in funktionaler Darstellung T2 - Jahrestagung der GAMM CY - Dortmund, Germany DA - 1986-04-01 PY - 1986 AN - OPUS4-6766 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kamlah, M. A1 - Korzen, Manfred A1 - Tsakmakis, Ch. T1 - Uniaxial ratchetting in rate-independent plasticity laws PY - 1997 SN - 0001-5970 SN - 1619-6937 VL - 120 SP - 173 EP - 198 PB - Springer CY - Wien AN - OPUS4-12020 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Korzen, Manfred A1 - Tsakmakis, Ch. T1 - Uniaxial ratchetting in linear viscoelasticity PY - 1997 SN - 0001-5970 SN - 1619-6937 VL - 120 SP - 173 EP - 198 PB - Springer CY - Wien AN - OPUS4-11490 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Rodrigues, J. P. C. A1 - Correia, A. M. T1 - Thermal Restraint Effects on the Fire Resistance of Steel Composite Steel and Concrete Columns T2 - International Conference APPLICATIONS OF STRUCTURAL FIRE ENGINEERING CY - Prague, Czech Republic DA - 2009-02-19 PY - 2009 AN - OPUS4-19094 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Korzen, Manfred A1 - Rodrigues, J. P. C. A1 - Correia, A. M. ED - F. Wald, ED - P. Kallerová, ED - J. Chlouba, T1 - Thermal restraint effects on the fire resistance of steel and composite steel and concrete columns T2 - International Conference - Applications of structural fire engineering CY - Prague, Czech Republic DA - 2009-02-19 KW - Fire resistance KW - Thermal restraint KW - Steel columns KW - Steel-concrete columns PY - 2009 SN - 978-80-01-04266-3 SP - 512 EP - 517 CY - Prague, Czech Republic AN - OPUS4-19111 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Rodrigues, J.P.C. A1 - Correia, A. M. T1 - Thermal Restraint Effects on the Fire Resistance of Steel and Composite Steel and Concrete Columns T2 - International Conference APPLICATIONS OF STRUCTURAL FIRE ENGINEERING CY - Prague, Czech Republic DA - 2009-02-19 PY - 2009 AN - OPUS4-19093 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Talebi, Elnaz A1 - Korzen, Manfred A1 - Hothan, Sascha T1 - The performance of concrete filled steel tube columns under postearthquake fires N2 - In this study, a nonlinear three-dimensional finite element (FE) model was developed and validated to investigate the response of concrete filled tube (CFT) columns subjected to post-earthquake fires. Three steps were considered successively in the modelling, namely, cyclic, thermal and structural analyses. Outputs from the cyclic loading including residual deformationswere imposed as an initial condition to the thermal-stress model, imitating the seismic response of the column. Subsequently, a nonlinear sequentially thermal-stress analysis was conducted to simulate the fire response of column after the earthquake. The proposed FE model was validated by comparing the simulation resultswith the observations of full-scale fire and cyclic tests available in the literature. The validated numericalmodelwas then used to study the behavior of CFT columns under the combined action of earthquake and fire as a multi-hazard event. Three probable seismic damage scenarios were considered in the column, namely, middle length, bottom and top end region damages. The level of damage was assumed as a high damage level, presuming that the column reached 50% of its lateral resistance while still maintaining ist overall stability after the earthquake. The results showed that the top and bottom end region damages have not significantly influence the fire response of the damaged column. Besides, the column with the middle span damage performed a lesser fire resistance time owing to the coincidence of damage location to that of onset of global buckling. KW - Post-earthquake fire KW - Concrete filled tube (CFT) column KW - Finite element analysis KW - Seismically damaged column KW - Fire resistance KW - Multi-hazard incident PY - 2018 U6 - https://doi.org/10.1016/j.jcsr.2018.07.013 SN - 0143-974X VL - 150 SP - 115 EP - 128 PB - Elsevier Ltd. AN - OPUS4-45813 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Talebi, Elnaz A1 - Korzen, Manfred A1 - Espinós, A. A1 - Hothan, Sascha ED - Albero, Vicente T1 - The effect of damage location on the performance of seismically damaged concrete filled steel tube columns at fire N2 - In this paper, a nonlinear three-dimensional finite element (FE) model was developed and validated to study the effect of seismic damage location on the response of concrete filled tube (CFT) columns at fire after earthquakes. Three analyses were conducted consecutively in the modelling, namely, cyclic, thermal and structural. Results of the cyclic loading analysis comprising residual deformations were applied as the Initial condition to the thermal-stress model, replicating the seismic performance of column. Following, a nonlinear sequentially coupled-thermal stress Analysis was carried out to investigate the fire response of CFT columns after the seismic event. Three damage scenarios were contemplated, considering any possible potential damages that could be generated by the earthquake loading on CFT columns. The accuracy of the proposed FE model was examined by comparing the numerical results with that of available tests on fire and cyclic loading. By means of the validated model, the performance of damaged CFT columns was then investigated under fire after earthquakes. The level of damage was assumed as a high damage level, presuming that the column reached 50% of ist lateral resistance while still maintaining its overall stability after the earthquake. The results were presented broadly, including the axial deformation history as well as the fire resistance time for CFT columns. To have a comprehensive insight on the influence of damage location in columns, the fire response of damaged specimens was compared with that of an intact one. T2 - 12th International Conference on Advances in Steel-Concrete Composite Structures (ASCCS 2018) CY - Valencia, Spain DA - 27.06. 2018 KW - Fire after earthquake KW - Concrete filled tube (CFT) column KW - Finite element model KW - Seismically damaged column KW - Damage location KW - Fire performance PY - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-457694 SN - 978-84-9048-601-6 SP - 835 EP - 842 PB - Editorial Universitat Politècnica de València CY - València AN - OPUS4-45769 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Testing and research at BAM in fire engineering with special concern to the development of the substructuring method T2 - Invited Lecture at the European Laboratory of Structural Assessment (ELSA) of the European Commission (EC) Joint Research Centre (JRC) CY - Ispra, Italy DA - 2007-03-15 PY - 2007 AN - OPUS4-14759 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Testing and research at BAM in fire engineering T2 - Konferenzzyklus "Neue Wege zur Sicherheit bei urbanen Bränden" Universität Coimbra CY - Coimbra, Portugal DA - 2006-05-20 PY - 2006 AN - OPUS4-12564 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Substrukturtechnik: Eine hybride Prüfmethode. Überblick mit Anwendung im Brandingeniueurwesen T2 - Vortrags- und Diskussionstagung Werkstoffprüfung CY - Bad Nauheim, Germany DA - 1999-12-02 PY - 1999 AN - OPUS4-6723 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Substrukturtechnik: Eine hybride experimentelle Methode im Ingenieurwesen T2 - Seminar Statik und Dynamik von Konstruktionen TU Berlin CY - Berlin, Germany DA - 1997-02-07 PY - 1997 AN - OPUS4-6736 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Magonette, G. A1 - Buchet, Ph. T1 - Substrukturtechnik als hybride Methode zur wirklichkeitsnäheren mechanischen Belastung von Bauteilen in Brandversuchen T2 - Jahrestagung der Gesellschaft für Angewandte Mathematik und Mechanik (GAMM) CY - Bremen, Germany DA - 1998-04-09 PY - 1998 AN - OPUS4-6735 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Substrukturtechnik als hybride Methode zur werklichkeitsnäheren mechanischen Belastung von Bauteilen in Brandversuchen T2 - BAM Kolloquium CY - Berlin, Germany DA - 2003-06-04 PY - 2003 AN - OPUS4-4234 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Substrukturtechnik - eine hybride Prüfmethode ; Überblick mit Anwendung im Brandingenieurwesen T2 - Tagung Werkstoffprüfung 1999 CY - Bad Nauheim, Deutschland DA - 1999-12-02 PY - 1999 SP - 215 EP - 218 PB - DVM CY - Berlin AN - OPUS4-11676 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Korzen, Manfred A1 - Ziener, Kai-Uwe A1 - Kühnast, Uwe A1 - Magonette, G. A1 - Buchet, Ph. A1 - Dzbikowicz, Z. ED - Virdi, K. T1 - Substructuring in fire engineering PY - 2000 SN - 0-419-25960-0 SP - 137 EP - 141 PB - spon CY - London AN - OPUS4-11675 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hörold, Andreas A1 - Schartel, Bernhard A1 - Trappe, Volker A1 - Korzen, Manfred A1 - Naumann, Maurice T1 - Structural integrity of sandwich structures in fire: an intermediate-scale approach N2 - A test set-up in intermediate scale was conceived to investigate the structural integrity of materials under fire. The task was to develop a realistic test scenario targeting component-like behaviour. Carbon-fibre-reinforced sandwich specimens (500 X 500 X 20 mm) were used to examine failure mechanisms, times to failure and critical failure loads under compression. Fire tests were performed with fully developed fire applied to one side of the specimen by an oil burner. In a first test series, the applied load was varied, but the fully developed fire remained unchanged. In general, times to failure were short. Decreased load levels resulted in prolonged times to failure and led to a different failure mechanism. Results obtained in the test series were compared with a bench-scale study (150 X 150 X 20 mm) investigating identical material. The comparison clearly revealed the influence of size on the time to failure and the load-bearing capacity. KW - Fire testing KW - Structural integrity KW - Carbon-fibre-reinforced plastics KW - Fully developed fire KW - Composites PY - 2013 U6 - https://doi.org/10.1080/15685543.2013.816620 SN - 0927-6440 SN - 1568-5543 VL - 20 IS - 9 (Special Issue: ECCM15: Part 3) SP - 741 EP - 759 PB - VSP CY - Zeist AN - OPUS4-29647 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hörold, Andreas A1 - Schartel, Bernhard A1 - Trappe, Volker A1 - Korzen, Manfred A1 - Naumann, Maurice T1 - Structural integrity in fire: an intermediate-scale approach T2 - ECCM15 - 15th European conference on composite materials CY - Venice, Italy DA - 2012-06-24 KW - Intermediate-scale test method KW - Structural integrity investigation KW - Fully developed fire KW - Carbon fibre reinforced plastics CFRP PY - 2012 SN - 978-88-88785-33-2 SP - 1 EP - 8(?) AN - OPUS4-26380 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Huismann, Sven A1 - Korzen, Manfred A1 - Rogge, Andreas ED - Rogge, A. ED - Meng, B. T1 - Stahlbetonstützen aus hochfestem Beton unter Brandbeanspruchung und die Anwendung allgemeiner Rechenverfahren T2 - 52. DAfStb-Forschungskolloquium CY - Berlin, Germany DA - 07.11.2011 PY - 2011 SN - 978-3-9814281-0-0 SP - 154 EP - 162 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-25186 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Korzen, Manfred A1 - Ziener, Kai-Uwe A1 - Riemer, Sven A1 - Magonette, G. A1 - Buchet, P. T1 - Some Remarks on the Substructuring Method Applied to Fire Resistance Tests of Columns T2 - 30th IAHS World Congress on Housing ; Housing Construction CY - Coimbra, Portugal DA - 2002-09-09 KW - Fire engineering KW - Fire resistance KW - Computer supported testing KW - Hybrid method PY - 2002 SN - 972-9027-31-5 VL - 3 SP - 1601 EP - 1607 CY - Coimbra, Portugal AN - OPUS4-1757 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Ziener, Kai-Uwe A1 - Riemer, Sven A1 - Magonette, G. A1 - Buchet, Ph. T1 - Some Remarks on the Substructuring Method Applied to Fire Resistance Tests of Columns T2 - IAHS World Congress on Housing CY - Coimbra, Portugal DA - 2002-09-09 PY - 2002 AN - OPUS4-6541 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Korzen, Manfred A1 - Tsakmakis, Ch. T1 - Some remarks on kinematic hardening PY - 1993 SN - 0334-8938 VL - 4 IS - 2 SP - 129 EP - 139 PB - Freund Publ. CY - London AN - OPUS4-11486 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pimienta, Pierre A1 - McNamee, Robert A1 - Robert, Fabienne A1 - Boström, Lars A1 - Huang, Shan-Shan A1 - Mróz, Katarzyna A1 - Davie, Colin A1 - Mohaine, Siyimane A1 - Alonso, Maria Cruz A1 - Bodnarova, Lenka A1 - Bosnjak, Josipa A1 - Dal Pont, Stefano A1 - Dao, Vinh A1 - Dauti, Dorjan A1 - Dehn, Frank A1 - Felicetti, Roberto A1 - Hager, Izabela A1 - Hela, Rudolf A1 - Hozjan, Tomaz A1 - Juknat, Michael A1 - Jumppanen, Ulla-Maija A1 - Kirnbauer, Johannes A1 - Kolsek, Jerneja A1 - Korzen, Manfred A1 - Lakhani, Hitesh A1 - Lion, Maxime A1 - Lo Monte, Francesco A1 - Maluk, Cristian A1 - Meftah, Fekri A1 - Miah, Md Jihad A1 - Millard, Alain A1 - Mindeguia, Jean-Christophe A1 - Moreau, Bérénice A1 - Msaad, Yahia A1 - Ozawa, Mitsuo A1 - Pesavento, Francesco A1 - Pham, Duc Toan A1 - Pistol, Klaus A1 - Rickard, Ieuan A1 - Rodrigues, Joao Paulo Correia A1 - Roosefid, Mohsen A1 - Schneider, Martin A1 - Sharma, Umesh Kumar A1 - Sideris, Kosmas A1 - Stelzner, Ludwig A1 - Weber, Benedikt A1 - Weise, Frank T1 - Recommendation of RILEM TC 256-SPF on fire spalling assessment during standardised fire resistance tests: complementary guidance and requirements N2 - The recommendation is based on the co-authors’ work organized by the RILEM TC 256-SPF “Spalling of concrete due to fire: testing and modelling”. It aims to provide useful information, guidance and best practices in fire spalling assessment to laboratories that perform large-scale tests based on fire resistance test standards. It provides guidance on the spalling observation techniques during testing, as well as post-test spalling quantification/assessment methods. This document is intended to be used in conjunction with the fire resistance test standards, e.g. EN 1363-1 and ISO 834-1. KW - Concrete KW - Fire spalling KW - Large scale tests KW - Standardised fire resistance tests PY - 2024 U6 - https://doi.org/10.1617/s11527-023-02248-z SN - 1871-6873 VL - 57 IS - 1 SP - 1 EP - 12 PB - Springer CY - Dordrecht AN - OPUS4-59288 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Schriever, Robert A1 - Ziener, Kai-Uwe A1 - Paetsch, O. A1 - Zumbusch, G. W. T1 - Realtime 3-d visualization of surface temperature fields measured by thermocouples on steel structures in fire engineering T2 - International Symposium Local Strain and Temperature Measurements in Non-Uniform Fields at High Temperatures CY - Berlin, Germany DA - 1996-03-15 PY - 1996 AN - OPUS4-6743 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Schriever, Robert A1 - Ziener, Kai-Uwe A1 - Paetsch, O. A1 - Zumbusch, G. W. ED - Ziebst, J. ED - Bessers, J. ED - Frenz, H. T1 - Real-time 3-D visualization of surface temperature fields measured by thermocouples on steel structures in fire engineering T2 - Local strain and temperature measurments in non-uniform fields at elevated temperatures CY - Berlin, Germany DA - 1996-03-14 PY - 1996 SP - 253 EP - 262 PB - Woodhead Publishing Ltd CY - Berlin AN - OPUS4-12024 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hörold, Andreas A1 - Schartel, Bernhard A1 - Trappe, Volker A1 - Gettwert, V. A1 - Korzen, Manfred T1 - Protecting the structural integrity of composites in fire: Intumescent coatings in the intermediate scale N2 - The fire behaviour of light-weight material used in structural applications is regarded as the main challenge to be solved for mass transportation. The task is to perform realistic experiments, including a mechanical test scenario under fully developed fires, to improve the material's reliability in structural applications. Our approach utilises an intermediate-scale test set-up (specimen size 500 × 500 mm) to apply realistic compressive loads and fully developed fires directly to one side of a carbon-fibre-reinforced sandwich composite. Three different intumescent coatings were applied to sandwich structures and compared to a bench-scale study. The results emphasise intumescent coatings as a promising method to sustain fire resistance, multiplying the time to failure. Nevertheless, the realistic intermediate-scale test using severe direct flame application underlines the extremely short failure times when the actual composite components are tested without any additional insulation. KW - Carbon-fibre-reinforced KW - Fire stability KW - High-temperature properties KW - Mechanical testing KW - Fully developed fire KW - Post-crash scenario PY - 2015 U6 - https://doi.org/10.1177/0731684415609791 SN - 0731-6844 SN - 1530-7964 VL - 34 IS - 24 SP - 2029 EP - 2044 PB - Technomic Publ. Co. CY - Westport, Conn. AN - OPUS4-35120 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Paetsch, O. A1 - Stalling, D. A1 - Korzen, Manfred T1 - Online-Visualisierung von Brandversuchen an Bauteilen N2 - For the evaluation of the fire resistance time of structural elements thermal and mechanical loadings are applied to the specimen. Up to now the monitored data is represented in tabular form and simple plots. In the following a visualization system to show the data in its geometrical context is discussed. T2 - VisEng'97 - Visualisierung im Ingenieurbereich "Pre- und Postprocessing in Strömungs- und Strukturmechanik" CY - Stuttgart, Deutschland DA - 1997-05-06 PY - 1997 UR - http://www.zib.de/visual-publications/sources/src-1997/brandvis.pdf SP - 1 EP - 13 CY - Stuttgart AN - OPUS4-12021 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Haupt, P. A1 - Korzen, Manfred ED - Fan, J. ED - Murakami, S. T1 - On the mathematical modelling of material behavior in continuum mechanics T2 - International Conference on Constitutive Laws for Engineering Materials CY - Chongqing, China DA - 1989-08-11 PY - 1989 SN - 0-08-037887-0 SN - 7-8000-3068-7 VL - 1 SP - 456 EP - 459 PB - International Academic Publ. AN - OPUS4-12027 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - On the influence of strain rate on the stress-strain behavior of structural steel at room and elevated temperature and its relationship to fire engineering T2 - Instituto Superior Tecnico (IST) CY - Lisbon, Portugal DA - 2001-03-29 PY - 2001 AN - OPUS4-6721 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Nouvelle théorie endochronique (VALANIS 1978) au cas unidimensionnel T2 - ONERA CY - Paris, France DA - 1985-06-25 PY - 1985 AN - OPUS4-6771 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Notes sur un nouveau modèle de matériau représentant un comportement viscoélastique-plastique T2 - Office Natioal d'Etudes et de Recherches Aérospatiales (ONERA) CY - Paris, France DA - 1985-09-27 PY - 1985 AN - OPUS4-6769 LA - fra AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pereira, F. A1 - Pistol, Klaus A1 - Korzen, Manfred A1 - Weise, Frank A1 - Pimienta, P. A1 - Carré, H. A1 - Huismann, Sven ED - Koenders, E.A.B. ED - Dehn, F. T1 - Monitoring of fire damage processes in concrete by pore pressure and acoustic emission measurements N2 - This paper presents the combined use of acoustic emission (AE), gas pore pressure and temperature measurements (PT). The simultaneous application of both techniques represents a new methodology in the context of fire spalling and contributes to a better understanding of the mechanisms of fire spalling, particular with regard to the interaction of micro cracking and pore pressure evolution. The study presents fire tests on normal strength concrete specimens with and without reinforcement at ISO Standard fire and at hydrocarbon (HC) fire. Supported by AE-analysis, it can be shown that due to the higher heating rate of the HC-fire in comparison to the ISO Standard fire the damage processes inside the concrete during the exposure are increased combined with augmenting the concrete permeability. As a consequence lower pore pressures were measured. However, despite the lower pore pressures, explosive spalling was observed. T2 - 2nd International RILEM workshop on concrete spalling due to fire exposure CY - Delft, The Netherlands DA - 05.10.2011 KW - Ordinary concrete KW - High temperature KW - Gas pore pressure KW - Acoustic emission KW - Spalling PY - 2011 SN - 978-2-35158-118-6 SP - 69 EP - 77 PB - RILEM Publications AN - OPUS4-24818 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Müller, Renate A1 - Stopp, V. A1 - Korzen, Manfred A1 - Proschek, P. T1 - Modified test and assessment methods for reactive fire protection systems in EN 13381-8 KW - Steel beams and columns KW - Intumescent coating KW - Dry film thickness KW - Fire resistance period KW - Stickability KW - Design temperatures PY - 2010 U6 - https://doi.org/10.1002/stco.201010031 SN - 1867-0520 SN - 1867-0539 VL - 3 IS - 4 SP - 243 EP - 247 PB - Ernst & Sohn CY - Berlin AN - OPUS4-22904 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Magonette, Georges A1 - Buchet, Ph. T1 - Mechanical loading of columns in fire tests by means of the substructuring method T2 - 8th International Conference on Fire Science & Engineering interflam 99 CY - Edinburgh, Scotland DA - 1999-07-01 PY - 1999 AN - OPUS4-6730 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Korzen, Manfred A1 - Magonette, G. A1 - Buchet, Ph. T1 - Mechanical loading of columns in fire tests by means of the substructuring method PY - 1999 SN - 0044-2267 SN - 0946-8463 VL - 79 IS - S2 SP - S617 EP - S618 PB - Wiley-VCH CY - Potsdam AN - OPUS4-12018 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Korzen, Manfred A1 - Magonette, G. A1 - Buchet, P. T1 - Mechanical loading of columns in fire tests by means of the substructering method T2 - 8th Interflam ; 8th International Fire Science and Engineering Conference CY - Edinburgh, Scotland, UK DA - 1999-06-29 PY - 1999 SN - 0-9532312-3-2 VL - 2 SP - 911 EP - 914 PB - Interscience Communications CY - London AN - OPUS4-11677 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Staus, St. T1 - Isotrope nichtlineare Viskoelastizität mit Hilfe von Maßstabsfunktionen der Gedächtnisspannung T2 - Jahrestagung der GAMM CY - Dresden, Germany DA - 1993-04-16 PY - 1993 AN - OPUS4-6748 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Korzen, Manfred A1 - Staus, St. T1 - Isotrope nichtlineare Viskoelastizität mit Hilfe von Maßstabsfunktionen der Gedächtnisspannung PY - 1994 SN - 0044-2267 SN - 0946-8463 VL - 74 SP - 325 EP - 326 PB - Wiley-VCH CY - Potsdam AN - OPUS4-11489 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Hybrid fire testing via the substructuring method T2 - EU-US-Asia workshop on hybrid testing CY - Joint Research Centre, Ispra, Italy DA - 2015-10-05 PY - 2015 AN - OPUS4-35113 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred ED - Pavese, Alberto T1 - Hybrid fire testing via the substructuring method N2 - Originally introduced in the field of earthquake engineering hybrid testing, i.e. the simultaneous combined application of numerical simulation techniques and execution of experiments, is nowadays used in different areas of experimental analysis. The focus of this paper is on the presentation of the so-called substructuring method as a hybrid method in fire engineering. Motivation are EU standards for fire resistance tests of columns or beams. According to these codes building elements are considered as stand-alone elements whereas in real fires each building element interacts with its adjacent elements. Therefore, to conduct a fire test in a more realistic fashion, the concept of hybrid substructuring as a special experimental technique has been adopted to fire engineering. Due to this concept the entire building, which is exposed to a real fire, is decomposed into two parts. One part is represented by the building element under test in a special furnace, whereas the remaining building environment is simulated by a model, based on the equations of thermomechanics. The paper addresses the historical development of the substructuring method in fire engineering supplemented by presentation of the results of realized fire resistance tests in substructuring mode on different types of specimens. T2 - 7th International Conference on Advances in Experimental Structural Engineering CY - Pavia, Italy DA - 6 September 2017 KW - Hybrid testing PY - 2017 SN - 978-88-85701-01-4 SP - 945 EP - 947 PB - EUCENTRE Foundation CY - Pavia, Italy AN - OPUS4-45760 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Daus, Lars-Hendrik A1 - Korzen, Manfred A1 - Schartel, Bernhard T1 - High-throughput fire tests and weathering-induced degradation behaviour of intumescent coatings N2 - In this work, the weathering-induced degradation of intumescent coatings was investigated by a systematic and comprehensive approach. A mechanism is revealed that is proposed to be responsible for the loss of function of intumescent coatings induced by weathering. First, the thermal decomposition of artificially weathered intumescent coatings was examined. To get a better understanding of the weathering and ageing phenomena, the degradation behaviour of the single ingredients during the weathering process was investigated, as well as their chemical and physical interactions. For the systematic approach, the materials that are essential for intumescence (ammonium polyphosphate, pentaerythritol, titanium dioxide, melamine and the binder) are treated with moisture, elevated temperature and UV radiation. Thermogravimetry (TG) and IR spectroscopy were used to compare the initial samples with their different grades of weathering. We demonstrate that ammonium polyphosphate, melamine and the binder are mainly responsible for the ageing process. Further, it was demonstrated that TG and IR spectroscopy are suitable measuring methods to detect the effects of weathering on intumescent coatings. Finally, a small-scale fire test procedure is introduced. Based on the reduction of the sample size, up to 50 samples can be tested in a single fire test. The results of this fire test have the same quality as the results from standard intermediate fire tests corresponding to DIN 4102-8. T2 - 3rd European Symposium on Fire Safety Science CY - Nancy, France DA - 12.09.1018 KW - Weathering KW - Intumescent coatings KW - High-Throughput Fire Tests PY - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-472023 UR - http://iopscience.iop.org/article/10.1088/1742-6596/1107/3/032014/pdf VL - 1107 SP - 032014 PB - IOP Publishing CY - Bristol AN - OPUS4-47202 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Müller, Renate A1 - Stopp, V. A1 - Korzen, Manfred A1 - Proschek, P. T1 - Geändertes Prüf- und Beurteilungsverfahren für reaktive Brandschutzbeschichtungen nach ETAG 018-2 - Was unterscheidet prEN 13381-8 von ENV 13381-4? KW - Reaktive Brandschutzsysteme KW - Feuerwiderstand KW - Stahl PY - 2009 U6 - https://doi.org/10.1002/dibt.200930038 SN - 1438-7778 SN - 1437-0964 VL - 40 IS - 5 SP - 144 EP - 148 PB - Ernst CY - Berlin AN - OPUS4-20019 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hörold, Andreas A1 - Schartel, Bernhard A1 - Trappe, Volker A1 - Korzen, Manfred A1 - Bünker, J. T1 - Fire stability of glass-fibre sandwich panels: The influence of core materials and flame retardants N2 - Fire resistance has become a key property for structural lightweight sandwich components in aviation, shipping, railway vehicles, and construction. The development of future composite materials and components demands adequate test procedures for simultaneous application of compression and fully developed fire. Therefore an intermediate-scale approach (specimen size = 500 mm x 500 mm) is applied with compressive loads (up to 1 MN) and direct application of a burner to one side of the specimens, as established in aviation for severe burn-through tests. The influence of different core structures (polyvinylchloride foam, polyisocyanorate foam reinforced by stitched glass bridges, and balsa wood) was investigated for glass-fibre-reinforced sandwich specimens with and without flame retardants applied on the fabrics, in the matrix, and on surface for each specimen at the same time. Times to failure were increased up to a factor of 4. The intumescent coating prolongs the time to failure significantly. What is more, using the intrinsic potential of the front skin together with the core to protect a load bearing back skin in sandwich panels, the design of the core – here using the wood core – is the most promising approach. KW - Fire resistance KW - Fire stability KW - Glass-fibre-reinforced plastics KW - Composite KW - Core materials PY - 2017 U6 - https://doi.org/10.1016/j.compstruct.2016.11.027 SN - 0263-8223 SN - 1879-1085 VL - 160 SP - 1310 EP - 1318 PB - Elsevier AN - OPUS4-38622 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Timme, Sebastian A1 - Trappe, Volker A1 - Korzen, Manfred A1 - Schartel, Bernhard T1 - Fire stability of carbon fiber reinforced polymer shells on the intermediate-scale N2 - The fire stability of carbon fiber reinforced polymer (CFRP) shell structures was investigated using an intermediate-scale test setup. The shell specimens are representative of typical load-bearing CFRPs in modern civil aviation. The CFRP shell specimens were exposed to a fully developed fire with direct flame impingement to one side at a heat flux of 182 kW/m2. Specimens were simultaneously loaded with constant compressive force equal to 40% of the ultimate failure load. CFRP shells and four different fire retarding configurations, using integrated protective layers, were investigated. Unprotected CFRP specimens failed after just 27 s. Specimens with integrated protective layers with low heat conductivity and high burn-through resistance showed the most promising results. An integrated titanium foil decelerated the decomposition of the epoxy matrix and increased the time to failure by 68% compared to the unprotected CFRP shell. KW - Fire stability KW - Carbon fiber reinforced polymer (CFRP) KW - Thermomechanical properties KW - Buckling KW - Fully developed fire PY - 2017 U6 - https://doi.org/10.1016/j.compstruct.2017.07.025 SN - 0263-8223 SN - 1879-1085 VL - 178 SP - 320 EP - 329 PB - Elsevier Ltd. AN - OPUS4-41283 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Rodrigues, J. P. C. T1 - Fire resistance tests on circular concrete columns T2 - Interflam 2013 - 13th International Conference and Exibition on Fire Science and Engineering CY - London, England DA - 2013-06-24 PY - 2013 AN - OPUS4-29645 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Rodrigues, J.P.C. A1 - Laím, L.M.S. T1 - Fire resistance tests on circular concrete columns N2 - Most of the previous studies on reinforced concrete columns with elastically restrained thermal elongation were carried out on square, rectangular or ‘+’-shaped cross sections. The fire resistance of these columns is probably more compromised than in circular columns due to the phenomenon of concrete detachment in the corners of the cross-section. In order to examine the influence of several parameters on the behaviour in fire of circular reinforced concrete columns with restrained thermal elongation, several fire resistance tests were carried out. The parameters tested were load, restraint level, slenderness of the column and the longitudinal reinforcement ratio. In the fire resistance tests the specimens were exposed to the ISO 834 Standard fire curve and the critical time and temperature and failure modes were determined. The test results mainly indicated that the spalling phenomenon may also occur in circular columns and so reducing its fire resistance. The restrained level might not so much relevant concerning the fire resistance of circular reinforced concrete columns. T2 - Interflam 2013 - 13th International fire science & engineering conference CY - Egham, Surrey, UK DA - 24.06.2013 KW - Fire KW - Column KW - Concrete KW - Circular KW - Restraining PY - 2013 SN - 978-0-9556548-9-3 SP - 1119 EP - 1130 PB - Interscience Communications Limited AN - OPUS4-29695 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Rodrigues, J.P.C. A1 - Laím, L.M. A1 - Korzen, Manfred T1 - Fire behaviour of circular concrete columns with restrained thermal elongation N2 - Most of the previous studies on reinforced concrete columns with elastically restrained thermal elongation were carried out on square, rectangular or '+'-shaped cross sections. The number of fire resistance tests on circular reinforced concrete columns with elastically restrained thermal elongation is still very small. In order to examine the influence of several parameters on the behaviour in fire of this type of columns several fire resistance tests were carried out. The parameters tested were the load and restraint level, slenderness of the column and longitudinal reinforcement ratio. In the fire resistance tests the specimens were exposed to the ISO 834 standard fire curve and the critical time (fire resistance) and temperature and failure modes were determined. The test results showed that the spalling phenomenon may occur in circular columns and so reducing its fire resistance. The increasing of the load level led to a reduction while the increasing of the longitudinal reinforcement ratio or the decreasing of the slenderness of the columns led to an increasing of their fire resistance. The restraint level might not be much relevant on the fire resistance of circular reinforced concrete columns. KW - Fire KW - Resistance KW - Concrete KW - Circular KW - Column KW - Restraining PY - 2014 U6 - https://doi.org/10.3151/jact.12.289 SN - 1346-8014 VL - 12 IS - 9 SP - 289 EP - 298 CY - Tokyo AN - OPUS4-31611 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Kühn, W. A1 - Korzen, Manfred A1 - Paetsch, O. T1 - Fast data assimilation in fire tests of steel members N2 - This report presents a fast data assimilation method to produce an interpolating time and space temperature distribution for steel members subject to fire testing. The method assimilates collected temperature data into the numerical integration of the heat equation. This physically based method also allows the computation of lateral and axial heat flux into and inside the member. PY - 1998 SN - 0933-7911 IS - 98-33 SP - 1 EP - 14 PB - ZIB CY - Berlin AN - OPUS4-12019 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Kühn, W. A1 - Paetsch, O. T1 - Fast data assimilation in fire tests of steel columns T2 - 4th International Congress on Industrial and Applied Mathematics ICIAM 99 CY - Edinburgh, Scotland DA - 1999-07-05 PY - 1999 AN - OPUS4-6727 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Korzen, Manfred T1 - Experimentally observed phenomena vis-à-vis current constitutive theories PY - 1987 SN - 0143-0084 VL - 22 SP - 171 EP - 184 PB - Applied Science Publ. Ltd. CY - Barking, Ess. AN - OPUS4-12083 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tornaghi, M. L. A1 - Tsionis, G. A1 - Pegon, P. A1 - Molina, J. A1 - Peroni, M. A1 - Korzen, Manfred A1 - Tondini, N. A1 - Covi, P. A1 - Abbiati, G. A1 - Antonelli, M. A1 - Gilardi, B. T1 - Experimental study of braced steel frames subjected to fire after earthquake N2 - The EQUFIRE project aims to study the post-earthquake fire Performance of steel frame structures and is part of the Transnational Access activities of the SERA project (www.sera-eu.org) at the ELSA Reaction Wall of the European Commission - Joint Research Centre. As it has happened in many historical occasions, after an earthquake, earthquakeinduced rupture of gas piping, failure of electrical systems, etc. may trigger fire. The structural fire performance can deteriorate because the fire acts on a previously damaged structure. In addition, the earthquake may have damaged fire protection elements and the fire can spread more rapidly if compartmentation walls have failed. This is particularly relevant for steel structures as the high thermal conductivity of elements with small thickness entails quick temperature rise with consequent fast loss of strength and stiffness. EQUFIRE studied a four-storey three-bay steel frame with concentric bracings in the central bay. The structure was designed for reference peak ground acceleration equal to 0.186g, soil type B and type 1 elastic response spectrum according to Eurocode 8. Tests were performed at the ELSA Reaction Wall and at the furnace of the Federal Institute for Materials Research and Testing (BAM). The experimental activities at the ELSA Reaction Wall comprise pseudo-dynamic tests on a full-scale specimen of the first storey of the building, while the upper three storeys are numerically simulated. The aim is to study the response of the structure and fire protection elements, including their interaction, under the design earthquake and for different configurations: bare frame without fire protection, specimen with three fire protection solutions (conventional and seismic-resistant boards, and vermiculite sprayed coating) applied on the bracing and one column, and with conventional and seismic-resistant fire barrier walls built in the two external bays of the specimen. The testing programme at BAM included fire tests of five columns (two specimens without fire protection elements and three specimens with the types of fire protection mentioned above). Before the fire test, each column was subjected to a horizontal and vertical displacement history resulting from the seismic action. During the fire tests, the effect of the surrounding structure was simulated by limiting the axial thermal expansion. The experimental results will serve to study the response of structural and non-structural components to fire following earthquake scenarios, with a view to improving existing design guidelines and future standards. T2 - The 17th World Conference on Earthquake Engineering - 17WCEE CY - Meeting was canceled DA - 13.09.2020 KW - Fire following earthquake KW - Concentrically braced steel frames KW - Large-scale tests KW - Pseudo-dynamic testing KW - Substructuring PY - 2020 SP - 2i-0104-1 EP - 2i-0104-12 AN - OPUS4-51426 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Correia, A.M. A1 - Rodrigues, J.P.C. A1 - Korzen, Manfred T1 - Experimental research on the load-bearing capacity of partially encased steel columns under fire conditons N2 - The composite steel and concrete columns are known to have enhanced fire behaviour when compared with bare steel columns. However there are still aspects that must be clarified, as the influence of the building surrounding structure on the fire resistance of the columns. In this paper, the results of fire resistance tests on partially encased steel columns carried out with two different experimental systems are compared. In one of the experimental systems, the building surrounding structure is materialised by a steel restraining frame, and in the other is performed by the so-called substructuring method. Due to the concept of hybrid substructuring, the entire building is decomposed in two parts: one is represented by the building element under test, whereas the remaining building is simulated numerically in a computer. The main conclusion drawn from this work was that the surrounding structure has a major influence in the development of axial forces in the test columns. Moreover, it was observed that the higher the non-dimensional axial restraint ratio the lower the critical time of the columns. KW - Fire resistance KW - Thermal restraint KW - Composite steel-concrete columns KW - Substructuring method KW - Restraining frame PY - 2012 U6 - https://doi.org/10.1260/2040-2317.3.1.81 SN - 2040-2317 VL - 3 IS - 1 SP - 81 EP - 94 PB - Multi-Science Publ. Co. CY - Brentwood AN - OPUS4-25632 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Huismann, Sven A1 - Korzen, Manfred T1 - Experimental and numerical study of high performance concrete columns subjected to fire loading T2 - Applications of Structural Fire Engineering CY - Prague, Czech Republic DA - 2009-02-19 PY - 2009 AN - OPUS4-18738 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Huismann, Sven A1 - Korzen, Manfred T1 - Experimental and numerical study of high performance concrete columns subjected to fire loading T2 - International Conference "Applications of structural fire engineering" CY - Prague, Czech Republic DA - 2009-02-19 KW - High performance concrete KW - Fire KW - High temperatures KW - Columns PY - 2009 SP - 246 EP - 251 CY - Prague, Czech Republic AN - OPUS4-19048 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Huismann, Sven A1 - Korzen, Manfred T1 - Experimental and numerical study of high performance concrete columns subjected to fire loading T2 - Applications of Structural Fire Engineering CY - Prague, Czech Republic DA - 2009-02-19 PY - 2009 AN - OPUS4-18986 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Huismann, Sven A1 - Korzen, Manfred A1 - Rogge, Andreas T1 - Entwicklung und Validierung eines allgemeinen Rechenverfahrens für Stahlbetonstützen aus hochfestem Beton unter Brandbeanspruchung N2 - Ausgehend von einer kritischen Analyse der Materialkennwerte für normalfesten (NFB) und hochfesten Beton (HFB) im Eurocode 2 wurden in grundlegenden Untersuchungen an der BAM exemplarisch für einen HFB die thermomechanischen Materialkennwerte bestimmt, um auf der Basis eines geeigneten Materialmodells das Verhalten von Stahlbetonstützen aus HFB unter Brandbeanspruchung zu simulieren. Die Validierung des Modells erfolgte mittels großmaßstäblicher Brandversuche an belasteten Stahlbetonstützen aus dem gleichen HFB wie in den Materialuntersuchungen. Es konnte gezeigt werden, dass die Festigkeit als charakteristischer Parameter des Materialmodells zwingend auf der Basis instationärer Versuche – und nicht aus stationären Versuchen wie bei NFB üblich – bestimmt werden muss. Mit den in vorgeschlagenen Materialbeziehungen für HFB wird das Tragverhalten der untersuchten Stützen dagegen deutlich überschätzt, was sich in den numerischen Simulationen insbesondere durch zu geringe Verformungen äußert.------------------------------------------------------------------------------------------------------ Development and Validation of an Advanced Calculation Model for High Strength Concrete Columns Subjected to Fire Loading Following a critical analysis of the material parameters of normal strength (NSC) and high strength concrete (HSC) presented in Eurocode 2 the thermo-mechanical material parameters of one representative HSC were identified. Using these parameters and based on an appropriate material model the behavior of HSC columns was simulated. The validation of the model was realized through real scale fire resistance tests on loaded columns of the same type of HSC as in the material identification tests. It was found that the strength as a characteristic parameter of the material model has to be identified on the basis of transient creep tests and not of stationary tests, respectively as realized usually for NSC. It could be shown that the structural behavior of the tested columns is overestimated if the numerical simulations are based on the material properties of HSC as proposed in. This feature is expressed especially through insufficient displacements. KW - Brandschutz KW - Verformungsverhalten KW - Hochleistungsbeton KW - Nichtlineare Berechnungsverfahren KW - Modellierung KW - EC KW - Eurocode KW - Normen KW - Berechnungs- und Bemessungsverfahren KW - Normen/Vorschriften/Richtlinien KW - Brandschutz KW - Versuche KW - Eurocode KW - Hochfester Beton KW - Feuerwiderstandsdauer KW - Finite-Elemente-Methode PY - 2012 U6 - https://doi.org/10.1002/best.201200010 SN - 0005-9900 SN - 1437-1006 VL - 107 IS - 6 SP - 372 EP - 378 PB - Ernst CY - Berlin AN - OPUS4-26100 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Huismann, Sven A1 - Zeiml, M. A1 - Korzen, Manfred A1 - Millard, A. ED - Millard, A. ED - Pimienta, P. T1 - Engineering Modelling N2 - This chapter presents the most commonly used approach to analyse the thermo-mechanical behaviour of concrete structures subjected to high temperatures as in the case of fire loading. Prescriptions of the Eurocode are detailed for the thermal as well as the mechanical analysis. Finally, recommendations from two national (Austrian and German) guidelines give some improvements for Underground infrastructure. KW - Concrete KW - High temperature KW - Stress-strain-relation PY - 2019 SN - 978-3-030-11995-9 U6 - https://doi.org/10.1007/978-3-030-11995-9 SN - 2213-204X SN - 2213-2031 SP - 15 EP - 25 PB - Springer CY - Cham, Switzerland AN - OPUS4-51186 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Einsatz des Visualisierungsprogramms GRAPE während Brandversuchen T2 - Uni Bonn Institut für Angewandte Mathematik CY - Bonn, Germany DA - 1996-04-29 PY - 1996 AN - OPUS4-6738 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Ein thermo-inelastisches Werkstoffmodell für Baustahl im Raum- und Hochtemperaturbereich T2 - Jahrestagung der GAMM CY - Braunschweig, Germany DA - 1994-04-08 PY - 1994 AN - OPUS4-6746 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Echtzeit-3-d-Visualisierung von Oberflächentemperaturfeldern T2 - SGI-Usergroup-Treffen auf der CeBit CY - Hanover, Germany DA - 1996-03-19 PY - 1996 AN - OPUS4-6740 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Sippel, J. A1 - Siegesmund, S. A1 - Weiss, Thomas A1 - Nitsch, K.-H. A1 - Korzen, Manfred ED - Prikryl, R. T1 - Decay of natural stones caused by fire damage T2 - European Geosciences Union General Assembly conference CY - Vienna, Austria DA - 2005-04-25 KW - 66Natural building stones KW - Fire resistance KW - Thermal expansion KW - Mineral reactions PY - 2007 SN - 1-86239-218-8 SN - 0305-8719 N1 - Serientitel: Geological Society special publication – Series title: Geological Society special publication IS - 271 SP - 139 EP - 151 PB - Geological Society CY - London AN - OPUS4-14722 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Huismann, Sven A1 - Rodrigues, J.P.C. A1 - Korzen, Manfred ED - Joao Paulo Correia Rodrigues, ED - Gabriel Alexander Khoury, ED - Niel Peter Hoj, T1 - Damage and strength reduction of a high performance concrete due to thermomechanical stresses T2 - International Workshop "Fire Design of Condrete Structures - from materials modelling to structural performance" CY - Coimbra, Portugal DA - 2007-11-08 KW - High-performance concrete (HPC) KW - Compressive strength KW - Thermal cracking KW - Thermo mechanical stresses KW - Ultrasonic testing PY - 2008 SP - 141 EP - 148 AN - OPUS4-18174 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred ED - Moreyra Garlock, Maria E. ED - Kodur, Venkatesh K.R. T1 - Constitutive modeling for fire engineering purposes—The challenge of modeling creep in an appropriate way N2 - The phenomenon of creep of structural steel in fire engineering is gaining more and more interest. Due to shortcomings of the EC3 constitutive model and other approaches based on classical creep theory an alternative approach mainly based on the ideas of Krempl is proposed. Due to this so-called operator approach the material as well as the constitutive model is looked upon as an operator. The application of this view serves as a guide through the analysis of the relationship between experimental facts and constitutive theory especially in the context of transient creep. T2 - 9th International Conference on Structures in Fire CY - Princeton, NJ, USA DA - 08.06.2016 KW - Fire engineering KW - Creep KW - Constitutive equation PY - 2016 SN - 978-1-60595-320-5 SP - 608 EP - 615 PB - DEStech Publications, Inc. CY - Lancaster, PA, USA AN - OPUS4-37329 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Constitutive equations of viscoplasticity - comparative representation and discussion T2 - Workshop der DFG-Forschergruppe Ingenieurwissenschaftliche und mathematische Analyse bruchmechanischer und inelastischer Probleme, Pfalzakademie Lambrecht CY - Lambrecht, Germany DA - 1990-01-30 PY - 1990 AN - OPUS4-6752 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Constitutive Equations for Structural Steel Subjected to Fire - Some Remarks T2 - International Conference APPLICATIONS OF STRUCTURAL FIRE ENGINEERING 2011 CY - Prague, Czech Republic DA - 2011-04-29 PY - 2011 AN - OPUS4-23653 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred ED - Wald, F. ED - Horová, K. ED - Jirku, J. T1 - Constitutive equations for structural steel subjected to fire - some remarks N2 - Although identified on the basis of so-called instationaiy creep-tests the constifrvtive model of Eurocode 3 (EN 1993-1-2, 2010) - hereinafter refened to as EC3 - represents a non-linear rateindependent relationship between stress and meclianical strain. I.e. the experimentally observed phenomenou of creep at constant stress but linear time varying temperature is described only through the temperature dependence of the material parameters characterizing the EC3 constitutive model. As a consequence some important phenomena cannot properly be described: E.g. creep or relaxation at constant temperature, creep or relaxation at non-monotonic temperature rates or sensitivity of the instationary creep process on the temperatme rate. T2 - International conference 'Applications of structural fire engineering' CY - Prague, Czech Republic DA - 29.04.2011 KW - Constitutive equation KW - Thermal strain KW - Steel KW - Fire KW - Creep PY - 2011 SN - 978-80-01-04798-9 SP - 79 EP - 83 AN - OPUS4-23711 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schartel, Bernhard A1 - Timme, Sebastian A1 - Hörold, Andreas A1 - Trappe, Volker A1 - Korzen, Manfred T1 - Composites in fire: Intermediate-scale testing of sandwich panels and shells N2 - Intermediate-scale testing is indispensable when investigating the fire resistance under simultaneous compressive load of components made of glass- and carbon-fibre-reinforced composites (GFRP and CFRP). BAM is successfully operating an intermediate-scale test stand, developed for a specimen size of 500 mm x 500 mm (1000 mm). The fire resistance in terms of fire stability of CFRP and GFRP sandwiches are investigated, e.g. at 20 % of their compressive failure load at room temperature. Times to failure increase by up to a factor of 4 due to intumescent coatings. For GFRP sandwiches, different core structures with and without additional flame retardants show an astonishing impact on time to failure. CFRP shell structures are investigated on the intermediate scale with and without stringer reinforcements, resulting in completely different mechanical failure behaviour in the ultimate load test as opposed to the fire resistance test. The stringers become the only load-carrying part, while the shell acts as a protective layer. Thus the design exploiting this self-protection potential, i.e. the residue of the front skin protecting the load-bearing structure, is highlighted as a most promising route to enhance the fire resistance of lightweight materials. T2 - Interflam 2016 CY - Egham, Surrey, UK DA - 04.06.2016 KW - composite KW - fire stability KW - fire resistance KW - sandwich panels KW - shells KW - intermediate-scale testing PY - 2016 SN - 978-0-9933933-2-7 SN - 978-0-9933933-3-4 VL - 2 SP - 1465 EP - 1470 PB - Interscience communications AN - OPUS4-36892 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Korzen, Manfred A1 - Rodrigues, J.P.C. A1 - Correia, A.M. ED - Kodur, V. ED - Franssen, J.-M. T1 - Composite columns made of partially encased steel sections subjected to fire T2 - 6th International conference "Structures in fire" CY - East Lansing, Michigan, USA DA - 2010-06-02 KW - Fire resistance KW - Thermal restraint KW - Composite steel-concrete columns KW - Substructuring method KW - Restraining frame PY - 2010 SN - 978-1-60595-027-3 SP - 341 EP - 348 PB - DEStech Publications, Inc. CY - Lancaster, PA, USA AN - OPUS4-22482 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Rodrigues, J. P. C. A1 - Correia, A. M. T1 - Composite Columns Made of Partially Encased Steel Sections Subjectd to Fire T2 - 6th International Conference Structures in Fire CY - East Lansing, MI, USA DA - 2010-06-02 PY - 2010 AN - OPUS4-21715 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pan, Zuo-Fen A1 - Schriever, Robert A1 - Bock, Hans Michael A1 - Korzen, Manfred T1 - Comparison of the temperature distribution in isolated steel columns tested in two furnaces PY - 1997 SN - 0015-2684 SN - 1572-8099 VL - 33 SP - 316 EP - 335 PB - Kluwer Academic CY - Norwell, Mass. AN - OPUS4-11492 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bock, Hans Michael A1 - Korzen, Manfred T1 - Brandschutztechnische Ertüchtigung von Stahlverbundhohlprofilstützen - Bericht über die "Proving Trials" an einem europäischen Prüfverfahren T2 - Beiträge zum 33. Forschungskolloquium CY - Berlin, BAM, Deutschland DA - 1996-10-10 PY - 1996 VL - 33 SP - 62 EP - 71 PB - Dt. Ausschuss für Stahlbeton im DIN CY - Berlin AN - OPUS4-12023 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Huismann, Sven A1 - Korzen, Manfred A1 - Weise, Frank A1 - Meng, Birgit ED - Rogge, A. ED - Meng, B. T1 - Betonabplatzungen unter Feuerangriff und der Einfluss von Polypropylenfasern auf die Mikrorissbildung T2 - 52. DAfStb-Forschungskolloquium CY - Berlin, Germany DA - 07.11.2011 PY - 2011 SN - 978-3-9814281-0-0 SP - 163 EP - 171 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-25185 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Korzen, Manfred A1 - Neves, C. A1 - Rodrigues, J.P.C. A1 - Valente, J.C. ED - Vila Real, P. T1 - Behaviour in fire of thermally restrained compressed steel members experimental and numerical approach T2 - 4th International Workshop "Structures in Fire" (SiF´06) CY - Aveiro, Portugal DA - 2006-05-10 KW - Fire Resistance KW - Thermal Restraint PY - 2006 SN - 972-789190-X VL - 1 SP - 273 EP - 286 PB - University of Aveiro AN - OPUS4-12462 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Neves, C. A1 - Rodrigues, J.P.C. A1 - Valente, J.C. T1 - Behaviour in fire of thermally restrained compressed steel members - experimental and numerical T2 - 4th International Workshop Structures in Fire- SIF'06 CY - Aveiro, Portugal DA - 2006-05-10 PY - 2006 AN - OPUS4-12565 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Assessment of the Fire Resistance of Structural and Compartimentation Elements by Means of Experimental Tests T2 - Vortrag innerhalb des Master Course "Fire Engineering" des Fachbereichs Bauingenieurwesen der Universität Coimbra (Seguranca Contra Riscos de Incendio em Edificios, Mestrado em Ciencias da Construcao da Universidade de Coimbra) CY - Coimbra, Portugal DA - 2002-06-14 PY - 2002 AN - OPUS4-1413 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - Anwendung der Substrukturtechnik als hybride Prüfmethode im Brandingenieurwesen N2 - In klassischen Feuerwiderstandsprüfungen wird die Tragfähigkeit eines einzelnen Tragwerkselementes (z. B. Stütze) unter Feuereinwirkung bestimmt. In realen Brandsituationen interagieren jedoch brandbeanspruchte Bauteile eines Gebäudes immer mit dem angrenzenden Tragwerk. Für eine genauere Bewertung der Tragfähigkeit werden deshalb spezielle experimentelle Methoden benötigt, die eine Interaktion zwischen geprüftem Bauteil und Tragwerk in Feuerwiderstandsprüfungen berücksichtigen. Zur Umsetzung dieses Anspruchs konnte in Kooperation mit dem Joint Research Centre (JRC) in Ispra, Italien, die bereits im Erdbebeningenieurwesen eingesetzte Substrukturmethode erfolgreich zur innovativen Nutzung des Stützenprüfofens der BAM portiert werden. Nach dieser Methode wird das gesamte Gebäude in zwei Teile zerlegt: Ein Teil entspricht dem zu prüfenden Bauteil, während der Rest des Gebäudes online durch ein analytisches oder numerisches Modell simuliert wird. Im Vortrag werden entsprechende Ergebnisse zahlreicher Experimente neben Erläuterungen zu Hard- und Software präsentiert. Abschließend werden weitere Forschungsaktivitäten des Fachbereiches Brandingenieurwesen vorgestellt. T2 - Kolloquium des Instituts für Baustatik & Konstruktion der ETH Zürich CY - ETH Zürich, Switzerland DA - 11. April 2017 KW - Feuerwiderstand KW - Hybride Versuchstechnik PY - 2017 AN - OPUS4-46599 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hörold, Andreas A1 - Schartel, Bernhard A1 - Trappe, Volker A1 - Korzen, Manfred T1 - An intermediate-scale fire testing approach on the structural integrity of lightweight materials N2 - Carbon or glass über composites and Sandwich structures, the lightweight materials of choice for aviation, naval, offshore and construction show an enormous energy saving potential. Their combination of excellent specific mechanical properties, high corrosive resistance and thermal insulation properties in combination with various adoptable fabrication techniques leading to mass and fuel cost reduction. The most limiting single factor for a wider use of fibre reinforced plastics (FRP) in particular as elements for structural application is believed to be their fire behaviour (Mouritz and Gibson, 2006). FRPs promote burning by themselves consuming the stabilizing polymeric matrix while embedded fibers (glass, carbon) persisting the flame (Mouritz et ah, 2006). Already at elevated temperatures (100 - 200 °C) the matrix softens with a loss in mechanical properties (Perret et al., 2011, Mouritz and Gibson, 2006). For this reason the stability of the structural component is decreased severely. Fire behavior becomes the major hazard to worry about, increasingly demanding targetoriented investigation, suitable testing and tailored development. Experimental approaches in the bench-scale have been proposed to investigate the structural integrity in the past (La Delfa et al., 2009, Gibson et al., 2010, Seggewiß, 2011, Mouritz and Gardiner, 2002, Schartel et al.). Ascribed to the small-scale neither the mechanical properties nor the effects of fire may be represented satisfactorily. Flence, the task is to perform more realistic investigations under adequate compressive loads in fully developed fires, based on suitable specimen sizes. Also (La Delfa et al., 2009)) have announced that it is evident that larger scale test of composites are needed. The aim of this study is to present a developed intermediate-scale test setup to perform more realistic investigations (Hörold et al.). Mechanical loading is generated by a column furnace in terms of compression due to a more severe response of specimens in fire tests (Seggewiß, 2011, Gibson et al., 2012, Feih et al., 2008, Feih et al., 2007). An oil burner used to determine the burnthrough resistance of thermal/acoustic insulation materials provides fire directly onto one side of the specimen (Federal Aviation Administration, 2003). Generating a fully developed fire the NexGen burner offers a homogenous heat flux of ~ 180 kW/m2. The intermediate-scale is addressed by specimen sizes either 500 x 500 mm or 1000 x 500 mm with a maximum thickness of 50 mm. The specimen attachment is realized by a compression device that was designed to apply the compressive loads, figure 1. The test setup for specimens with component like dimensions allows realistic investigations up to structural failure in absence and presence of fire load. A first test series was carried out with different levels of loading while the fire remained unchanged. Failure mechanisms, temperature distributions, diversity of FRPs regarding fiber, matrix, lay-up and core as well as flame retardant Systems are in the scope of investigation. T2 - Fire and materials 2013 - 13th International conference and exhibition CY - San Francisco, CA, USA DA - 28.01.2013 PY - 2013 SP - 221 EP - 226 PB - Interscience Communications CY - London, UK AN - OPUS4-27782 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Meftah, F. A1 - Pesavento, F. A1 - Davie, C. A1 - Dal Pont, S. A1 - Zeiml, M. A1 - Korzen, Manfred A1 - Millard, A. ED - Millard, A. ED - Pimienta, P. T1 - Advanced Modelling N2 - In this chapter, advanced models based on a General thermo-Hydro-Mechanical (THCM) Framework are considered. In These approaches, the concrete is considered as a porous medium, the pores of which are partly filled by gas (a mixture of air and vapour) and water. KW - Concrete KW - High temperature KW - Stress-strain-relation PY - 2019 SN - 978-3-030-11994-2 SN - 978-3-030-11995-9 U6 - https://doi.org/10.1007/978-3-030-11995-9 SN - 2213-204X SN - 2213-2031 SP - 27 EP - 65 PB - Springer CY - Cham, Switzerland AN - OPUS4-50174 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - A viscoelastic-plastic model of material behavior T2 - Seminar Kontinuumsmechanik der festn Körper Mathematisches Forschungsinstitut Oberwolfach CY - Oberwolfach, Germany DA - 1990-03-27 PY - 1990 AN - OPUS4-6750 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred T1 - A numerical model for the integration of a viscoelastic-plastic constitutive model T2 - Second International Conference on Computational Plasticity COMPLAS II CY - Barcelona, Spain DA - 1989-09-19 PY - 1989 AN - OPUS4-6755 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Korzen, Manfred ED - Owen, D. T1 - A numerical method for the integration of a viscoelastic-plastic constitutive model T2 - 2nd International Conference on Computational Plasticity (COMPLAS) CY - Barcelona, Spain DA - 1989-09-18 PY - 1989 SN - 0-906674-71-9 IS - 2 SP - 603 EP - 613 PB - Pineridge Press CY - Swansea AN - OPUS4-12079 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Haupt, P. T1 - A new constitutive model for the phenomenological representation of rate-dependent and rate-independent material behavoir T2 - International Seminar on the Inelastic Behavoir of Solids: Models and Utilization CY - Besancon, France DA - 1988-08-30 PY - 1988 AN - OPUS4-6763 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Korzen, Manfred A1 - Haupt, P. ED - Cailletaud, G. ED - Delobelle, P. T1 - A new constitutive model for the phenomenological representation of rate-dependent and rate-independent material behavior T2 - International Seminar on the Inelastic Behaviour of Solids CY - Besançon, France DA - 1988-08-30 PY - 1988 N1 - Serientitel: Proceedings of the International MECAMAT Seminar – Series title: Proceedings of the International MECAMAT Seminar IS - 3 SP - I-41-I-52 PB - MECAMAT CY - Besançon AN - OPUS4-12080 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Huismann, Sven A1 - Korzen, Manfred A1 - Schneider, U. ED - Kodur, V. ED - Franssen, J.-M. T1 - A material model for the numerical simulation of high strength concrete columns subjected to fire loading T2 - 6th International conference "Structures in fire" CY - East Lansing, Michigan, USA DA - 2010-06-02 KW - High performance concrete KW - Columns KW - Fire KW - High temperatures KW - Numerical modelling KW - Numerical simulation PY - 2010 SN - 978-1-60595-027-3 SP - 312 EP - 319 PB - DEStech Publications, Inc. CY - Lancaster, PA, USA AN - OPUS4-21562 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hauswaldt, Sebastian A1 - Korzen, Manfred A1 - Hartmann, S. ED - Fontana, M. ED - Frangi, A. ED - Knobloch, M. T1 - A continuum-mechanical model for FE-simulations of steel constructions in fire T2 - SIF 2012 - 7th International conference on structures in fire CY - Zurich, Switzerland DA - 2012-06-06 KW - Constitutive equation KW - Viscoplasticity KW - Endochronic plasticity KW - UMAT KW - Finite element method KW - Fire resistance PY - 2012 U6 - https://doi.org/10.3929/ethz-a-007050197 SP - 439 EP - 448 CY - Zurich, Switzerland AN - OPUS4-26108 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Hauswaldt, Sebastian A1 - Korzen, Manfred T1 - A constitutive model for use in finite element simulations in structural fire design T2 - 11th International symposium on fire protection CY - Leipzig, Germany DA - 2010-06-08 KW - Steel KW - Fire KW - Constitutive model KW - Eurocode KW - Creep KW - Finite element simulation KW - ABAQUS KW - UMAT KW - Deformation theory of plasticity PY - 2010 SP - 1 EP - 9(?) AN - OPUS4-22683 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Daus, Lars-Hendrik A1 - Schartel, Bernhard A1 - Wachtendorf, Volker A1 - Mangelsdorf, R. A1 - Korzen, Manfred T1 - A chain is no stronger than its weakest link: Weathering resistance of water-based intumescent coatings for steel applications N2 - A systematic approach was used to investigate the weathering-induced degradation of a common water–based intumescent coating. In this study, the coatings are intended for humid indoor applications on steel substrates. The coating contains ammonium polyphosphate, pentaerythritol, melamine, and polyvinyl acetate. By replacing each ingredient with a less water-soluble substance, the most vulnerable substances, polyvinyl acetate and pentaerythritol, were identified. Furthermore, the weathering resistance of the system was improved by exchanging the ingredients. The coatings were stressed by artificial weathering tests and evaluated by fire tests. Thermogravimetry and Fourier-transform infrared spectroscopy were used to study the thermal decomposition. This study lays the foundation for the development of a new generation of water-based intumescent coatings. KW - Intumescence KW - Fire resistance KW - Fire protective coatings KW - Weathering KW - Thermogravimetric analyses PY - 2021 U6 - https://doi.org/10.1177/0734904120961064 SN - 0734-9041 SN - 1530-8049 VL - 39 IS - 1 SP - 72 EP - 102 PB - SAGE AN - OPUS4-52015 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -