@book{SteinmannFischerLoyetal., author = {Steinmann, Gerald A. and Fischer, Manfred and Loy, Hardy and Teichgr{\"a}ber, Burkhard}, title = {Fachkraft f{\"u}r Abwassertechnik - Handbuch f{\"u}r Umwelttechnische Berufe, Band 3}, edition = {10}, publisher = {DWA}, address = {Hennef}, isbn = {978-3-88721-251-3}, pages = {780}, language = {de} } @article{DrenkardFischerSaueretal., author = {Drenkard, Hannah and Fischer, Christian and Sauer, Veit and Gehlen, Christoph}, title = {On the Chloride Distribution in Concrete and Mortar Samples after an RCM Test}, series = {Materials}, volume = {16}, journal = {Materials}, number = {8}, issn = {1996-1944}, doi = {10.3390/ma16082952}, pages = {2952 -- 2952}, abstract = {It is of essential need to face the challenges of CO2 reduction in industrial cement and concrete production reliable test methods in order to evaluate the performance of concretes, especially with regard to the service life of our infrastructure. The rapid chloride migration test (RCM test) is a standard method to assess the resistance against chloride ingress of concrete. However, during our study, certain critical questions arose with regard to the chloride distribution. The sharp chloride ingress front based on the model assumptions contradicted the shallow gradient of the experimental data. For this reason, investigations on chloride distribution in concrete and mortar samples after RCM tests were performed. The focus was on the factors influencing the extraction, e.g., time after RCM test and the location on sample. Furthermore, differences between concrete and mortar samples were investigated. The investigations showed that no sharp gradient on concrete samples was found due to the extremely uneven chloride front. In contrast, the theoretical profile shape was instead demonstrated on mortar specimens. The prerequisite for this result is that the drill powder must be taken directly after the completion of the RCM test from very uniform penetration areas. Thus, the model assumptions on the chloride distribution via the RCM test could be confirmed.}, language = {en} } @book{Bergner, author = {Bergner, Harald}, title = {Rißbreitenbeschr{\"a}nkung zwangbeanspruchter Bauteile aus hochfestem Normalbeton}, number = {482}, publisher = {Beuth}, language = {de} } @inproceedings{LangnerKleuderleinKukovec, author = {Langner, Normen and Kleuderlein, Jonas and Kukovec, Sara}, title = {Practicability of New and Innovative Products}, pages = {6}, abstract = {In construction, for general contractors the use of newly developed products is always a risk and therefore often leads to the rejection of innovative components. The reason is the lack of practical experience as well as normative regulations and test certificates. Furthermore, instruc-tions and re¬commendations for the use under certain boundary conditions are also missing. Due to this reason, a simple method was developed to review the practicability of new and in-novative products in fa{\c{c}}ade constructions. With specific technical questions developed with fa{\c{c}}ade consultants the evaluation of innovative fa{\c{c}}ade components for planning, erection, uti-lization, and demolition is possible. The aim was to make a substantial evaluation of innovative fa{\c{c}}ade components regarding their practicability as well as the influence of the new product on resource efficiency and durability. Therefore, the cost-benefit analysis was chosen for the eval-uation. The methodology was divided into two main process steps: in the first step the product is evaluated by means of predetermined selection answers and in the second step, a weighting ratio of the different criteria is set by the user. In total, the review consists of four main criteria, which are divided into 16 fine criteria with an overall of 40 evaluation questions. Thereby, the main criteria are differentiated according to the life cycle of a building and include planning, construction, operation, and removal of the building. The results of the assessment of new and innovative fa{\c{c}}ade components evaluate the potential of the new product to meet the requirements as part of future facade structures and identify weaknesses and risks of the products at an early stage. With this, the co-operation between manufacturers and executing companies can be tightened to optimize products before their market launch, especially in terms of practicability, durability and resource efficiency.}, language = {en} } @article{Steinmann, author = {Steinmann, Gerald A.}, title = {Betriebserfahrungen mit Biofiltern zur Abwasserreinigung - DWA-Arbeitsbericht}, series = {Korrespondenz Abwasser}, volume = {61}, journal = {Korrespondenz Abwasser}, number = {9}, address = {Hennef}, issn = {0341-1540}, pages = {769 -- 769}, language = {de} } @article{Loehr, author = {L{\"o}hr, Armin}, title = {Schubsicherung mit oben offenen B{\"u}geln}, series = {Beton-und Stahlbetonbau}, journal = {Beton-und Stahlbetonbau}, language = {de} } @incollection{LoehrRehmEligehausen, author = {L{\"o}hr, Armin and Rehm, G. and Eligehausen, R.}, title = {Schubsicherung mit oben offenen B{\"u}geln}, series = {Bericht des Instituts f{\"u}r Werkstoffe im Bauwesen der Universit{\"a}t Stuttgart}, booktitle = {Bericht des Instituts f{\"u}r Werkstoffe im Bauwesen der Universit{\"a}t Stuttgart}, language = {de} } @incollection{LoehrSawade, author = {L{\"o}hr, Armin and Sawade, G.}, title = {Holografische Interferometrie}, series = {Werkstoffe und Konstruktion}, booktitle = {Werkstoffe und Konstruktion}, editor = {Eligehausen, R.}, language = {de} } @incollection{Loehr, author = {L{\"o}hr, Armin}, title = {Schnelle Standfestigkeit von fließf{\"a}higen Vergußbetonen}, series = {Werkstoffe und Konstruktion}, booktitle = {Werkstoffe und Konstruktion}, editor = {Eligehausen, R.}, language = {de} } @incollection{Loehr, author = {L{\"o}hr, Armin}, title = {Schubsicherung durch oben offene B{\"u}gel}, series = {Werkstoffe und Konstruktion}, booktitle = {Werkstoffe und Konstruktion}, editor = {Eligehausen, R.}, language = {de} } @incollection{LoehrNuernberg, author = {L{\"o}hr, Armin and N{\"u}rnberg, U.}, title = {Korrosion von Stahl in Beton}, series = {Deutscher Ausschuss f{\"u}r Stahlbeton}, booktitle = {Deutscher Ausschuss f{\"u}r Stahlbeton}, number = {393}, address = {N{\"u}rnberg}, language = {de} } @article{Volz, author = {Volz, Michael}, title = {Fatigue strength of repair-welded headed studs}, series = {ce/papers: 11th International Symposium on Steel Bridges 2024}, volume = {7}, journal = {ce/papers: 11th International Symposium on Steel Bridges 2024}, number = {3-4}, publisher = {Ernst \& Sohn}, doi = {10.1002/cepa.3078}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-57566}, pages = {5}, abstract = {Welded connections of headed studs are highly stressed details in bridge structures in steel-concrete composite construction and are largely responsible for the functionality of the supporting structures. At the same time, this detail requires a lot of resources due to the high welding effort and therefore has a major influence on the economic success. An important criterion for the economic and ecological balance of the structure is the durability of the welded joint, which is quantified by the fatigue strength. The welding of headed studs for composite bridges is usually carried out using fully mechanised drawn arc stud welding in accordance with EN ISO 14555. Due to the process, stud welds that do not fulfil the standard requirements for flawless condition may occur in individual cases. The design rules for stud load-bearing capacity in accordance with EN 1994-2 are based on tests and only apply to connections produced using drawn arc stud welding. In the past, there were practicable and tacitly accepted solutions for repairing such sporadically occurring faulty welds, but these were never systematically investigated. Particularly against the background of fatigue loading, repair-welded stud connections are now to be systematically investigated in a project funded by the AIF. The article provides an overview of the execution of stud welded joints and presents the tests planned in the project in order to achieve a practicable recommendation for the repair welding of headed studs.}, language = {en} } @inproceedings{LangnerBrunnVoellner, author = {Langner, Normen and Brunn, Ansgar and Voellner, David}, title = {Drone-based Optimization And Validation Of Numerical Simulations Of Urban Heat Islands}, series = {SimBuild 2024 - Eleventh National Conference of IBPSA-USA, Denver, 2024}, booktitle = {SimBuild 2024 - Eleventh National Conference of IBPSA-USA, Denver, 2024}, abstract = {In this ongoing research project, advanced drone technology is employed in conjunction with simula-tion models to assess the impacts of urban climate, with a specific focus on Urban Heat Islands (UHI). The novel methodology was tested in the historical downtown areas of two German cities. Through the creation of high-resolution 3D-models of urban structures and the analysis of material properties, the research project aims to accurately predict the cli-mate impacts of urban planning decisions.The results of the project provide planners with pre-cise insights for evaluating adaptation measures and mitigating the adverse effects of climate change in cities, ultimately improving living conditions there-in. The research undertaking also pioneers the use of high-temporal-resolution drone data for analyzing temperature patterns and considers various contribu-tions to the heat island effect for comprehensive climate-adaptive urban planning.}, language = {en} } @book{Steinmann, author = {Steinmann, Gerald A.}, title = {Bemessung von Tropfk{\"o}rperanlagen, Anlagen mit Rotationstauchk{\"o}rpern und Anlagen mit getauchten Festbetten - Arbeitsblatt DWA-A 281 (2021-11, Gelbdruck)}, address = {Hennef}, organization = {Deutsche Vereinigung f{\"u}r Wasserwirtschaft, Abwasser und Abfall e.V.}, isbn = {978-3-96862-135-7}, pages = {59}, language = {de} } @article{Steinmann, author = {Steinmann, Gerald A.}, title = {Wasserr{\"u}ckhalt in der Fl{\"a}che und "Jahrhunderthochwasser"}, series = {Mitteilungen Universit{\"a}t der Bundeswehr, Institut f{\"u}r Wasserwesen}, journal = {Mitteilungen Universit{\"a}t der Bundeswehr, Institut f{\"u}r Wasserwesen}, number = {100}, editor = {Disse, M. and Kalk, M. and Rieger, W.}, publisher = {Shaker}, address = {Aachen}, issn = {0720-1273}, pages = {127 -- 127}, language = {de} } @article{Steinmann, author = {Steinmann, Gerald A.}, title = {Neue Erkenntnisse {\"u}ber Anlagen mit getauchtem Festbett - DWA-Arbeitsbericht}, series = {Korrespondenz Abwasser}, volume = {49}, journal = {Korrespondenz Abwasser}, number = {12}, address = {Hennef}, issn = {0341-1540}, pages = {1703 -- 1703}, language = {de} } @article{Steinmann, author = {Steinmann, Gerald A.}, title = {Wasserr{\"u}ckhalt in der Fl{\"a}che und "Jahrhunderthochwasser"}, series = {Mitgliederrundbrief DWA Landesverband Bayern}, journal = {Mitgliederrundbrief DWA Landesverband Bayern}, number = {1}, publisher = {Deutsche Vereinigung f{\"u}r Wasserwirtschaft, Abwasser und Abfall e.V. (DWA), Landesverband Bayern}, address = {M{\"u}nchen}, pages = {4 -- 4}, language = {de} } @inproceedings{MedgenbergAndreas, author = {Medgenberg, Justus and Andreas, Makowski}, title = {Entwicklung einer Methodik zur Ableitung von Sanierungsstrategien mit mathematischer Optimierung}, series = {Bauphysiktage in Weimar 2024}, booktitle = {Bauphysiktage in Weimar 2024}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-61971}, pages = {8}, abstract = {Die energetische Bestandssanierung hat f{\"u}r die Dekarbonisierung des Geb{\"a}udesektors eine entscheidende Funktion. Um Ressourcen bestm{\"o}glich einsetzen, ist die ganzheitliche Betrachtung und Optimierung von Sanierungsentscheidungen sinnvoll. Mathematische Optimierungsverfahren werden im deutschsprachigen Raum f{\"u}r diese Entscheidungs-findung bisher kaum genutzt. Vorgestellt wird eine neue Methodik, die mittels eines Metamodells auf Basis punktueller Simulationsergebnisse die Optimierung variabler Zielfunktionen erlaubt. Die St{\"a}rke der Methode liegt in der Anwendbarkeit f{\"u}r eine große Zahl von Sanierungskombinationen bei minimiertem Rechenaufwand. Ergebnisse f{\"u}r reale Sanierungsprojekte werden anhand eines exemplarisch untersuchten Einfamilienhaus vorgestellt. Dabei werden unterschiedliche Zielfunktionen betrachtet und optimierte Sanierungs-strategien abgeleitet. Derzeit ist die Methode f{\"u}r die Bewertung des Heizw{\"a}rmebedarfs von Wohn-geb{\"a}uden anwendbar. Es sind verschiedene Erweiterungen denkbar und geplant.}, language = {de} } @article{Medgenberg, author = {Medgenberg, Justus}, title = {Anwendung von mathematischer Optimierung f{\"u}r eine effiziente energetische Sanierungsplanung}, volume = {46}, number = {3}, doi = {10.1002/bapi.202400013}, pages = {142 -- 153}, abstract = {Die energetische Bestandssanierung hat f{\"u}r die Dekarbonisierung des Geb{\"a}udesektors eine entscheidende Funktion. Um Ressourcen bestm{\"o}glich einzusetzen, ist die ganzheitliche Quantifizierung und Optimierung von Sanierungsentscheidungen sinnvoll. Die Anwendung von mathematischen Optimierungsverfahren bietet Potenzial, das bisher vor allem im deutschsprachigen Raum kaum genutzt wird. Vorgestellt wird eine neue Methodik, die mittels eines mathematischen Ersatzmodells die Optimierung variabler Zielfunktionen erlaubt. Das Modell wird anhand von punktuellen Geb{\"a}udesimulationen kalibriert. Die St{\"a}rke der vorgestellten Methode liegt in der Analyse einer sehr großen Zahl von Sanierungskombinationen bei minimalem Rechenaufwand. Die Anwendbarkeit auf reale Objekte wird anhand von zwei unterschiedlichen exemplarischen Wohngeb{\"a}udetypen demonstriert. Resultierende Sanierungsstrategien aus der Analyse werden beispielhaft f{\"u}r drei verschiedene Zielfunktionen mit Investitions- und Betriebskosten sowie CO2-Ausstoß bei unterschiedlichen Restriktionen dargestellt. Derzeit ist die vorgestellte Methode f{\"u}r die Bewertung und Optimierung des Heizw{\"a}rmebedarfs von Wohngeb{\"a}uden anwendbar. Es sind verschiedene Erweiterungen der Methodik angedacht.}, language = {de} } @inproceedings{MedgenbergMakowski, author = {Medgenberg, Justus and Makowski, Andreas}, title = {Work in Progress: Methodik zur Ableitung von Sanierungsstrategien f{\"u}r Nichtwohngeb{\"a}ude im Bestand mittels mathematischer Optimierung}, series = {BauSIM 2024 in Wien}, booktitle = {BauSIM 2024 in Wien}, pages = {7}, abstract = {Die energetische Bestandssanierung hat f{\"u}r die Dekarbonisierung des Geb{\"a}udesektors in Europa eine entscheidende Funktion. Mathematische Optimierungsverfahren k{\"o}nnen f{\"u}r eine ganzheitliche Betrachtung und Optimierung von Sanierungsentscheidungen eingesetzt werden. Sie erm{\"o}glichen einen effizienten Einsatz von knappen personellen, finanziellen und materiellen Ressourcen. Die Verbreitung in der Praxis ist allerdings bisher nur sehr gering. Das Autorenteam erkennt hier strukturell bisher nicht genutztes Potenzial und stellt neue Ergebnisse zum Einsatz einer entwickelten Optimierungsmethodik zur Ableitung von Sanierungsstrategien f{\"u}r Bestandsgeb{\"a}ude vor. Die Methodik ber{\"u}cksichtigt in der Zielfunktion wahlweise Kostenaspekte und CO2-Ausstoß und wird hier erstmals auf ein fiktives Nichtwohngeb{\"a}ude mit zwei unterschiedlichen Nutzungstypen angewendet. Die Optimierung erfolgt exemplarisch hinsichtlich der Reduktion des betriebsbedingten CO2-Ausstoßes. Die Ergebnisse zeigen die vielversprechende Anwendbarkeit der Methodik zur Ableitung von Sanierungsstrategien f{\"u}r Bestandsgeb{\"a}ude.}, language = {de} } @inproceedings{Steinmann, author = {Steinmann, Gerald A.}, title = {Tropfk{\"o}rper, Tauchk{\"o}rper und getauchte Festbetten : was bringt das neue DWA-A 281? N{\"u}rnberger Wasserwirtschaftstage 2022}, organization = {DWA Landesverband Bayern}, language = {de} } @incollection{Bergner, author = {Bergner, Harald}, title = {Tragwerksentwurf und Vorbemessung}, series = {Schneider Bautabellen f{\"u}r Architekten}, booktitle = {Schneider Bautabellen f{\"u}r Architekten}, edition = {25.}, publisher = {Reguvis Verlag}, isbn = {978-3-8462-1315-5}, language = {de} } @incollection{Bergner, author = {Bergner, Harald}, title = {Tragwerksentwurf und Vorbemessung}, series = {Schneider Bautabellen f{\"u}r Ingenieure}, booktitle = {Schneider Bautabellen f{\"u}r Ingenieure}, edition = {25.}, publisher = {Reguvis Verlag}, isbn = {978-3-8462-1316-2}, language = {de} } @incollection{Bergner, author = {Bergner, Harald}, title = {Tragwerk und Konstruktion}, series = {Praxishandbuch Immobilienwirtschaft}, booktitle = {Praxishandbuch Immobilienwirtschaft}, publisher = {Reguvis Verlag}, isbn = {978-3-8462-1096-3}, pages = {597 -- 614}, language = {de} } @techreport{Reuther, type = {Working Paper}, author = {Reuther, Iris M.}, title = {Die tempor{\"a}re Senkung der Umsatzsteuers{\"a}tze - was bedeutet sie f{\"u}r Architekten und ihre Baustellen?}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-18142}, pages = {5}, abstract = {Die zum Juli 2020 und damit sehr kurzfristig anstehende tempor{\"a}re Senkung der Mehrwert- bzw. Umsatzsteuers{\"a}tze wirft viele Fragen auf. Vor allem erwartbare Folgen auf die Abwicklung laufender Baustellen werden in diesem Arbeitspapier skizziert.}, language = {de} }