Beton- und Stahlbetonbau最新文献

{"title":"Bedeutung der Betonzugspannungen in Holz-Beton-Verbunddecken","authors":"Dipl.-Ing. DDr. Christian Huber,&nbsp;Simeon Vassilev,&nbsp;Mag. Dipl.-Ing. Dr. Josef Peter Schuller,&nbsp;Ass.- Prof. Dipl.-Ing. Dr. Karl Deix","doi":"10.1002/best.70067","DOIUrl":"https://doi.org/10.1002/best.70067","url":null,"abstract":"<p><b>With regard to tensile stresses in timber-concrete composite floors</b></p><p>Timber-concrete composite floors represent an efficient hybrid construction method whose load-bearing behavior is significantly influenced by the stiffness of the composite joint. This study investigates the influence of the slip modulus of composite screws on the bending edge tensile stresses in the concrete slab and shows that, due to their low stiffness, commercially available screws often lead to unsatisfactory design requirements for larger spans and imposed loads. In particular, the normative requirement to use the centric tensile strength of the concrete appears to be a critical factor. Against this background, the possibility of a more ecologically and economically advantageous design utilizing the higher flexural tensile strength of concrete is discussed. Since to date no systematic investigations have been carried out for slender concrete cross-sections (5–7 cm thick), as is typical for subsequently reinforced timber-concrete floors, 48 small-scale bending tests were conducted. The results show a significant exceedance of both the normative centric tensile strength and the literature values for the flexural strength (determined on larger specimen). These findings suggest that a more realistic design is possible by utilizing the flexural strength of the concrete, thus opening up new potential for the optimization of timber-concrete slabs.</p>","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 3","pages":"202-212"},"PeriodicalIF":0.8,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564941","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/best.70082","DOIUrl":"https://doi.org/10.1002/best.70082","url":null,"abstract":"<p><b>In Service of Baukultur – 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</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":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 3","pages":"255-267"},"PeriodicalIF":0.8,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565283","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":"Trag- und Verformungsverhalten von CPC-Platten unter vorwiegenden Biegebeanspruchungen","authors":"Dipl.-Ing. Goran Vojvodic,&nbsp;Prof. Dr.-Ing. habil. Viet Tue Nguyen,&nbsp;Prof. Josef Kurath","doi":"10.1002/best.70079","DOIUrl":"https://doi.org/10.1002/best.70079","url":null,"abstract":"<p><b>Bearing and deformation behavior of carbon prestressing concrete slabs (CPC) under bending</b></p><p>Carbon prestressed concrete slabs (CPC) with thickness between 20 and 69 mm are an innovative product which leads to significant reduction of construction own weight in usage. In Switzerland CPC-technology is used at different purpose of use for over 10 years. In Germany the usage of CPC slabs is regulated trough permit Z-71.3-42 and first CPC-projects are completed successfully. This paper will show that bending load capacity determination of CPC slabs can occur analogue the mechanical correlation with prestressed concrete. The meaning of the decompression is however not comparable. Through the stress increase determination in carbon reinforcement and the reduction of stiffness after cracking can be shown over and beyond that failure announcement is given despite lack of reinforcement plastic deformation capacity. Based on correlation analysis a proposal for better exploitation of CPC slab design capacity will be encouraged.</p>","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 3","pages":"213-221"},"PeriodicalIF":0.8,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570329","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":"Hanfbastbewehrungsstäbe – Tastversuche in haufwerksporigem Leichtbeton","authors":"Florian Zürnstein M.Sc.,&nbsp;Dr.-Ing. Nancy Beuntner,&nbsp;Prof. Dr.-Ing. Thomas Braml,&nbsp;Prof. Dr.-Ing. Karl-Christian Thienel","doi":"10.1002/best.70083","DOIUrl":"https://doi.org/10.1002/best.70083","url":null,"abstract":"<p><b>Hemp bast reinforcement – First attempts in lightweight aggregate concrete</b></p><p>In order to meet the challenges of our time, future modern solid structures should be built using climate-friendly construction materials. In addition to low-carbon concretes, non-metallic reinforcement based on renewable hemp bast fibers can supplement the product portfolio of resource-saving building materials. This publication presents a first attempt in profiling possibilities of novel hemp bast reinforcement bars and their bond behavior in lightweight aggregate concrete (LAC) with porous matrix. It focused on identifying a suitable profile out of four different applications: fine or coarse sand-coated, wrapped, and a combination of sand-coated and wrapped. The profiled bars’ bond behavior was investigated in pull-out tests. The test evaluations were processed by using a suitable filter to reduce noise in the measured data; the selection of which and the test results obtained are presented based on the maximum bond stress. Based on the first attempts the bond behavior of profiled hemp bast reinforcement bars in lightweight aggregate concrete (LAC) is discussed, and possible influencing factors. In conclusion, this paper shows the potential of hemp bast reinforcement bars as structural reinforcement and the suitability of fine sand-coating as an additive profiling method.</p>","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 3","pages":"241-254"},"PeriodicalIF":0.8,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570326","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":"Die Brücken-Kontrollleuchte","authors":"Dr.-Ing. Felix Clauß","doi":"10.1002/best.70080","DOIUrl":"https://doi.org/10.1002/best.70080","url":null,"abstract":"<p>Schon ein gewöhnlicher Pkw verfügt heute über zahlreiche Sensoren, die Geschwindigkeit, Temperatur, Druck, Drehzahl und Position des Fahrzeugs und seiner mechanischen Bauteile kontinuierlich erfassen. Die Messgrößen werden ausgewertet und gespeichert. Weichen sie vom zulässigen Bereich ab, signalisiert die Motorkontrollleuchte ein Defizit, welches dann frühzeitig ohne schwerwiegendere Folgen behoben werden kann; die Betriebsfähigkeit bleibt erhalten. Brücken hingegen, die täglich zu Tausenden von Fahrzeugen genutzt werden und den Wert dieser bei Weitem übersteigen, sind kaum mit Systemen zur Zustandsüberwachung ausgestattet – sie sind quasi blind und warten darauf, in regelmäßigen Untersuchungen inspiziert zu werden.</p><p>Es stellt sich die Frage der Verhältnismäßigkeit.</p><p>Verschiedenste Verfahren zur Überwachung von Bauwerken stehen bereits zur Verfügung. Sie reichen von klassischen Systemen mit Dehnungsmessstreifen oder Wegaufnehmern über moderne faseroptische Messsysteme hin zu akustischen Verfahren, die zum Beispiel nach Spannstahlbrüchen horchen oder aktiv emittierten Ultraschall verwenden, um Brücken zu durchleuchten. Bei bereits defizitären und bald zu ersetzenden Brückenbauwerken werden einige dieser Systeme schon heute eingesetzt. Der Nutzen ist klar: Die Brücken werden unter Berücksichtigung ihres tatsächlichen, gemessenen Zustands weiter betrieben und die Restlebensdauer ausgeschöpft.</p><p>Hier zeigt sich das Potenzial, mit der Zustandsüberwachung auch schon früher vor einem Schaden zu beginnen. Erfasst die kontinuierliche Überwachung dann erste strukturelle Veränderungen, meldet die Brücken-Kontrollleuchte sie, lange bevor sich Schäden sichtbar an der Oberfläche abzeichnen. Mit Ort und Ausmaß der Veränderung wird ein rechtzeitiges Eingreifen möglich und im Gegensatz zu wenigen großen sichern mehrere kleine Verstärkungsmaßnahmen die Struktur, machen sie weiterhin beständig und verhindern langfristig Nutzungseinschränkungen.</p><p>Natürlich ist die Zustandsüberwachung dabei nur eines von mehreren Werkzeugen im Brückenbau. Es braucht ebenso die rechnerische Beurteilung, Maßnahmen zur Verstärkung, intelligente und adaptive Systeme sowie innovative Konzepte für Neubau und Ersatzneubau. Die thematische Breite des Brückenbaus spiegelt sich auch in diesem Heft wider.</p><p>Eine anregende Lektüre mit lehrreichen Einblicken in aktuelle Forschung und neueste Projekte aus der Baupraxis wünscht Ihnen</p><p>Felix Clauß</p><p>[email protected]</p>","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 2","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/best.70080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146224405","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":"Inhalt: Beton- und Stahlbetonbau 2/2026","authors":"","doi":"10.1002/best.70087","DOIUrl":"https://doi.org/10.1002/best.70087","url":null,"abstract":"","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 2","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/best.70087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217217","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: Beton- und Stahlbetonbau 02/2026","authors":"","doi":"10.1002/best.70086","DOIUrl":"https://doi.org/10.1002/best.70086","url":null,"abstract":"","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 2","pages":"181-182"},"PeriodicalIF":0.8,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217215","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: Beton- und Stahlbetonbau 2/2026","authors":"","doi":"10.1002/best.70084","DOIUrl":"https://doi.org/10.1002/best.70084","url":null,"abstract":"","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 2","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/best.70084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217216","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":"Vorschau: Beton- und Stahlbetonbau 2/2026","authors":"","doi":"10.1002/best.70088","DOIUrl":"https://doi.org/10.1002/best.70088","url":null,"abstract":"","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 2","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/best.70088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217214","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":"Beton- und Stahlbetonbau aktuell 2/2026","authors":"","doi":"10.1002/best.70085","DOIUrl":"https://doi.org/10.1002/best.70085","url":null,"abstract":"","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 2","pages":"179-181"},"PeriodicalIF":0.8,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217213","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}