Bautechnik最新文献

{"title":"Kreislaufwirtschaft – ein Opfer der Industrialisierung?","authors":"Univ. Prof. Dipl.-Ing. Dr. Benjamin Kromoser","doi":"10.1002/bate.70108","DOIUrl":"https://doi.org/10.1002/bate.70108","url":null,"abstract":"<p>Obwohl es aktuell oftmals so suggeriert wird, ist die Kreislaufwirtschaft keine neue Erfindung. Die Natur macht es uns schon immer vor, und auch im Bauwesen war der Ansatz in der Vergangenheit zentral verankert. Materialien und Baustoffe wurden, wo möglich, wiederverwendet oder, wenn das nicht möglich war, recycelt. Grund dafür waren einerseits einfachere Bauweisen und die damit verbundene einfachere Trennbarkeit von Bauteilen und Baustoffen und andererseits der damit verbundene hohe menschliche Aufwand und die damit in Verbindung stehenden hohen Kosten, die mit der Beschaffung von Rohmaterial sowie auch der Weiterverarbeitung und dem Transport verbunden waren.</p><p>Im Zuge des Beginns der Nutzung von fossilen Brennstoffen mit hoher Energiedichte und der Industrialisierung wurden die Herstellungs- und Transportprozesse wesentlich effizienter, und große Mengen an Material konnten mit vergleichsweise wenig menschlichem Aufwand bereitgestellt werden. Das Resultat war, dass sich das Verhältnis von Materialkosten zu Personalkosten deutlich in Richtung eines erheblich größeren Einflusses der Personalkosten verschob, egal ob für Planungs- oder Ausführungsleistungen. Aktuell sind Baumaterialien in den industrialisierten Staaten mit vergleichsweise niedrigen Material- und hohen Personalkosten verbunden. In der Baupraxis hat das dazu geführt, dass sich ein nahezu lineares Wirtschaftssystem nach dem Prinzip Take-Make-Waste entwickelt hat, mit dem wir nun konfrontiert sind. Problematisch dabei ist nicht nur die aktuelle fehlende planerische und baupraktische Umsetzung und die hohe Umweltbelastung der aktuellen Baumethoden, sondern auch das mittlerweile fehlende Wissen, wie vollumfänglich kreislauffähig gebaut werden kann. Die Baumethoden haben sich in den vergangenen Jahrzehnten weiterentwickelt, z. B. in Richtung eines höheren Komforts in Innenräumen und eines geringeren Energiebedarfs in der Nutzung, allerdings nicht mit dem wesentlichen Fokus einer möglichst hochwertigen Kreislaufführung von Gebäuden, Bauteilen und Baustoffen. Nun gibt es in der Wissenschaft, Wirtschaft und auch bei der öffentlichen Hand umfassende Anstrengungen, um wieder eine Kreislaufwirtschaft zu etablieren, allerdings noch mit vergleichsweise wenig praktischer Umsetzung – zumindest in der Baubranche. Problematisch ist auch, dass momentan oft lediglich einzelne Teilaspekte der Kreislaufwirtschaft herausgepickt werden. Kreislaufwirtschaft im Bauwesen ist jedoch ein Zusammenspiel aus vielen Teilaspekten, die allesamt gemeinsam adressiert werden müssen, um messbare Fortschritte zu erzielen.</p><p>Eine Zusammenstellung der relevanten Aspekte ist beispielsweise im Bewertungssystem ZiFa 1.0, das an der BOKU University in Wien entwickelt wurde, vorgestellt (detaillierte Informationen sind im dazugehörigen Fachbeitrag zu finden). Die dort formulierten Indikatoren umfassen beispielsweise die Inputströme, demnach welche Materialien verbaut werden (1), die Durchführung einer Ökobilanz (2), p","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":"221-222"},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bate.70108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zirkularitätsbewertung von Gebäuden","authors":"Dipl.-Ing. Dr. nat. techn. Mathias Hammerl,&nbsp;Elias Büchinger,&nbsp;Univ.-Prof. Dipl.-Ing. Dr. techn. Benjamin Kromoser","doi":"10.1002/bate.70095","DOIUrl":"https://doi.org/10.1002/bate.70095","url":null,"abstract":"<p><b>Circularity assessment of buildings – Conceptual introduction and exemplary assessment of ZiFa 1.0 – a circularity factor for Vienna</b></p><p>The paper presents a comprehensive system developed at the Institute of Green Civil Engineering at BOKU University for assessing the circularity of buildings (both new constructions and renovations), which is composed of eight cumulative indicators. ZiFa 1.0 is based on extensive research into the state of the art. The key difference between this system and existing methods is its prioritization of circular economy principles over general sustainability indicators. This article includes a description of the system, the development of the indicators, and the methodology for assessing a buildings circularity. Subsequently, the cumulative indicators: (1) materials used, (3) usage intensity, (4) flexibility, (5) durability, (6) deconstruction and reuse, (7) recycling, and (8) disposal, are described in detail, along with their sub-indicators and respective goals. A consideration of the cumulative indicator (2) life cycle assessment was not included due to its scope. The evaluation of a real construction project demonstrates that a quantitative assessment of circularity is possible with ZiFa 1.0, though many foundational aspects during the planning phase remain insufficient. For instance, information on material origin (secondary or primary raw materials) cannot yet be provided. However, planning parameters such as the spacing of load-bearing structures are readily available and assessable. Based on these findings, the paper provides an outlook on further necessary investigations to make the circularity of buildings or components verifiable.</p>","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":"223-237"},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bautechnik aktuell 3/2026","authors":"","doi":"10.1002/bate.70105","DOIUrl":"https://doi.org/10.1002/bate.70105","url":null,"abstract":"","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":"303-306"},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Titelbild: Bautechnik 3/2026","authors":"","doi":"10.1002/bate.70109","DOIUrl":"https://doi.org/10.1002/bate.70109","url":null,"abstract":"","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":""},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bate.70109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Veranstaltungen: Bautechnik 3/2026","authors":"","doi":"10.1002/bate.70106","DOIUrl":"https://doi.org/10.1002/bate.70106","url":null,"abstract":"","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":""},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ökologie und Kreislauffähigkeit von Systemen zur seriellen thermischen Fassadensanierung","authors":"Dipl.-Ing. Jeremias Metzler,&nbsp;Univ.Prof. Dipl.-Ing. Dr. Benjamin Kromoser","doi":"10.1002/bate.70070","DOIUrl":"https://doi.org/10.1002/bate.70070","url":null,"abstract":"<p><b>Ecology and circularity of systems for serial thermal façade renovation</b></p><p>Sustainable approaches to thermal building refurbishment are of central importance to reduce the high energy and resource consumption in the building sector. This study examines the environmental performance of various systems for thermal façade renovation and compares modular prefabricated (timber-) frame systems with conventional external thermal insulation composite systems. The database consists of environmental product declarations, and the evaluation is simplified to focus exclusively on energy demand [MJ] and global warming potential [CO2-eq.]. The analysis includes a comparison of the building materials and construction methods used, with the aim of better understanding their ecological potential. Additionally, the circularity of the systems under consideration is assessed, with a particular focus on their potential for dismantling, reuse, and recycling. The results show that modular systems, with a thoughtful choice of materials and corresponding construction methods, can achieve advantages in terms of non-renewable energy demand and global warming potential. In terms of circularity, the modular systems perform significantly better. Based on the findings, an optimised design for a prefabricated timber frame element is presented. The results highlight the central role of material efficiency, life cycle assessment, and circular economy, as well as their interaction as the basis for a sustainable transformation of the building sector.</p>","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":"238-252"},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zirkuläres Bauen: Der Wiener Weg","authors":"Dipl.-Ing.in Bernadette Luger M.Sc.","doi":"10.1002/bate.70098","DOIUrl":"https://doi.org/10.1002/bate.70098","url":null,"abstract":"<p><b>Circular construction: The Vienna way</b></p><p>The construction and real estate sector is particularly resource- and emission-intensive. Transforming from a linear to a circular construction economy requires a viable strategy as well as the involvement of all actors in a shared learning and change process. The City of Vienna has set the goal of gradually establishing circular planning and construction as a standard by 2030 and has anchored this goal in its circular economy strategy. To achieve this goal, the programme ‘DoTank Circular City Vienna 2020–2030’ was established, collaborating closely with industry and academia through cross-sectoral exchange formats. A central project within the DoTank is the development of a Circularity Factor as a structured set of criteria and indicators for circular construction.</p>","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":"280-282"},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147563584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Charakterisierung des Betonstahls in Stahlbetonmodulen im Kontext der Wiederverwendung","authors":"Dr.-Ing. Lukas Brackmann,&nbsp;Michelle Treppmann M.Sc,&nbsp;Prof. Dr. Ing. Sebastian Weber","doi":"10.1002/bate.70062","DOIUrl":"https://doi.org/10.1002/bate.70062","url":null,"abstract":"<p><b>Characterisation of the reinforcing steel in reinforced concrete modules in the context of reuse</b></p><p>Reinforcing steel makes a decisive contribution to the load-bearing capacity of reinforced concrete modules. Before modules can be reused, it must therefore be ensured that the reinforcing steel has sufficient load-bearing capacity under static and cyclic-mechanical loading. However, the calculation of the load-bearing capacity for decades-old reinforcing steel is currently associated with a high degree of uncertainty, resulting from insufficient documentation of the steel used, changes in the standards, but also possible time-dependent changes in the reinforcing steel itself. To reduce the uncertainty, it is therefore necessary to characterise the reinforcing steel. A key challenge for characterisation is the need to preserve the reinforced concrete modules. Therefore, only non-destructive testing methods or those that can be carried out on small sample volumes can be considered. Further challenges arise from the potentially large quantity of modules to be analysed. It is necessary to keep the time and personnel required to characterise the reinforcing steel as low as possible to make the reuse concept economically viable. These challenges are being addressed by subproject B01 in the newly established Collaborative Research Centre 1683. This publication is intended to provide an outlook on the solutions that will be used to meet the challenges mentioned above.</p>","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":"253-261"},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Im Dienste der Baukultur – 21 Jahre werkstoffübergreifendes Entwerfen und Konstruieren in Lehre und Forschung","authors":"Martin Rettinger M.Sc.,&nbsp;Max Dombrowski M.Sc.,&nbsp;Kristina Schiefner M.Sc.,&nbsp;Dipl.-Ing. Dirk Peissl,&nbsp;María Serrano-Mesa M.Sc.,&nbsp;Dipl.-Ing. Sebastian Heberling,&nbsp;André Prziwarzinski M.Sc.,&nbsp;Prathamesh Khorgade M. Tech.,&nbsp;Berhanu Melkamu Mengistie M. Tech.,&nbsp;Prof. Dr.-Ing. Alex Hückler","doi":"10.1002/bate.70085","DOIUrl":"https://doi.org/10.1002/bate.70085","url":null,"abstract":"<p><b><i>In Service of Baukultur</i> – <i>21 years of material-comprehensive conceptual and structural design in teaching and research: A tribute to Prof. Dr. sc. techn. Mike Schlaich on the occasion of his farewell at TU Berlin</i></b></p><p>From October 2004 until September 2025, for a total of 21 years, the Chair of Conceptual and Structural Design at TU Berlin was headed by Prof. Dr. sc. techn. Mike Schlaich. During this time, he shaped an entire generation of students and research assistants through his teaching and research, and his achievements in the field of structural design have had a profound impact on the international construction community. In doing so, he has always promoted the view that structural engineers are not solely responsible for ensuring load-bearing capacity and serviceability, but rather play an active role in shaping our built environment and thus in nurturing ‘Baukultur’. This attitude is reflected in all his activities as a university teacher and researcher, from the major themes of his lectures to the smallest structural details of his research projects. Material-comprehensive conceptual and structural design, e.g. with high-strength carbon fibres for prestressing and tensile members, form-optimised concrete shells for ceiling systems or thermally insulating infra-lightweight concrete for the building envelope, has consistently been of central importance in his work. In this article, his final generation of research assistants dare to reflect on the work of Prof. Dr. sc. techn. Mike Schlaich and discuss – from their limited perspective – the highlights in teaching and research under his leadership.</p>","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":"283-295"},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Qualitätsprüfung in BIM-Projekten: Was wirklich zählt","authors":"Paul-Christian Max","doi":"10.1002/bate.70097","DOIUrl":"https://doi.org/10.1002/bate.70097","url":null,"abstract":"<p><b>Quality assurance in BIM projects: What really matters</b></p><p>BIM models serve not only as a basis for planning, but also for coordination, communication and quality assurance. Model verification is considered a key mechanism for identifying errors at an early stage, reducing risks and increasing efficiency. In practice, however, it often hinders a project. That is why AFRY has designed a process chain for various planning phases that ensures a minimum quality of the models, and the feasibility of all further verification processes based on them. Formal, spatial, alphanumeric and geometric checks play a central role here, with data in each category being checked for various quality characteristics. Quality testing requires the existence of a coordination model. Due to the large number of models in the infrastructure, a file-based approach is very cumbersome. That is why AFRY has also designed a process for this purpose that automatically transfers the contents of the files to a cloud-based object database, making them available for high-performance evaluation. Recommendations for the design of the testing processes and an outlook conclude the article.</p>","PeriodicalId":55396,"journal":{"name":"Bautechnik","volume":"103 3","pages":"296-302"},"PeriodicalIF":0.5,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}