Beton- und Stahlbetonbau最新文献_第10页

Kompensation von vertikalen Temperaturgradienten an Brücken durch Temperaturinduktion 通过温度感应补偿桥梁的垂直温度梯度

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-31 DOI: 10.1002/best.70012

Lukas Heußner M.Sc., Dr.-Ing. David Sanio, Dr.-Ing. Mark Alexander Ahrens, Prof. Dr.-Ing. Peter Mark

{"title":"Kompensation von vertikalen Temperaturgradienten an Brücken durch Temperaturinduktion","authors":"Lukas Heußner M.Sc., Dr.-Ing. David Sanio, Dr.-Ing. Mark Alexander Ahrens, Prof. Dr.-Ing. Peter Mark","doi":"10.1002/best.70012","DOIUrl":"https://doi.org/10.1002/best.70012","url":null,"abstract":"Compensation of vertical temperature gradients on bridges using temperature inductionClimatic effects induce non-stationary temperature fields into bridges. The linear, vertical temperature portion generates bending constraints in statically indeterminate structures. In summer, for example, the associated stresses can be as large as those due to traffic. Local temperature induction offers a solution when the bottom slab is heated, and the deck slab is cooled – or vice versa. This induces an inverted gradient and compensates for external temperature stresses. A method for temperature induction of cross-sections was first developed on a scaled demonstrator (1:2) of a prestressed concrete box girder bridge and subsequently realized on the real structure. Temperature induction inside the box girder was achieved through heating mats and water cooling. Internally installed thermocouples measure the temperature distribution and validate the results of numerical computation of the non-stationary temperature field. The results indicate that the temperature gradient can be adjusted by –8.4 K through cooling at about –30 W/m2 and heating at about 90 W/m2. Applying the system to a prestressed concrete bridge demonstrates its effectiveness under ambient thermal conditions, too. On this bridge, heating the bottom slab with 37 W/m2 already changed the gradient by about –2.0 K over a period of 38 hours.","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"121 2","pages":"138-150"},"PeriodicalIF":0.8,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146217487","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}

引用次数: 0

Hybrid M – Besonderheiten bei der Planung eines multifunktionalen Infrastrukturprojekts in innerstädtischer Lage 混合M -城市多功能基础设施项目规划的特点

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-31 DOI: 10.1002/best.70010

Dipl.-Ing. Wolfgang Straub

引用次数: 0

Untersuchung des Tragverhaltens verschiedener Kervenverbindungen eines neu entwickelten, demontierbaren HBV-Deckensystems 新开发的可拆卸HBV帽系统的各种Kerken化合物的携带行为的研究

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-31 DOI: 10.1002/best.70009

Adrian Twardella M.Sc., Dr. Hooman Eslami, Dr. Laddu Bhagya Jayasinghe, Prof. Dr.-Ing. Danièle Waldmann-Diederich

{"title":"Untersuchung des Tragverhaltens verschiedener Kervenverbindungen eines neu entwickelten, demontierbaren HBV-Deckensystems","authors":"Adrian Twardella M.Sc., Dr. Hooman Eslami, Dr. Laddu Bhagya Jayasinghe, Prof. Dr.-Ing. Danièle Waldmann-Diederich","doi":"10.1002/best.70009","DOIUrl":"https://doi.org/10.1002/best.70009","url":null,"abstract":"Investigation of the load-bearing behaviour of different notch connections in a new, demountable TCC ceiling systemThe construction industry contributes significantly to global energy and resource consumption. In view of climate targets, sustainable materials and the concept of Design for Disassembly (DfD) – developing components that can be dismantled and reused with minimal effort – are gaining increasing relevance. This is particularly true for hybrid elements that combine the advantages of different materials within a single cross-section. In this study, prefabricated timber-concrete composite (TCC) floor elements were developed with a focus on DfD. The key objective was to optimize the shear connection between timber and concrete, as it largely governs the structural behaviour. Load-bearing capacity, ductility and disassembly of different notch connections were investigated as an alternative to bonded or mechanical connectors. The results show that notched connections provide a structurally efficient and reversible solution. The birdsmouth-shaped notch proved especially effective, offering high load-bearing capacity, good ductility, and ease of disassembly. The newly developed TCC elements demonstrated strong composite action and simple separability – clear advantages in terms of reusability and environmental performance.","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"120 10","pages":"822-834"},"PeriodicalIF":0.8,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145371847","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}

引用次数: 0

Einsturz der Carolabrücke in Dresden Teil 2 在德累斯顿的Karlbrucke倒塌

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-31 DOI: 10.1002/best.70008

Dr.-Ing. Gregor Schacht, Prof. Dr.-Ing. Steffen Marx, Dr.-Ing. Silke Scheerer, Dipl.-Ing. Max Fiedler SFI., Dr.-Ing. Robert Ritter, Dipl.-Ing. Luise Clages, Chris Voigt M.Eng., David Czeschka M.Sc., Dr.-Ing. Gino Ebell, MR Prof. Dr.-Ing. Gero Marzahn

引用次数: 0

Zugversuche an Garnen aus rezyklierten Carbonfasern 回收碳纤维纱线的拉伸试验

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-31 DOI: 10.1002/best.70007

Dipl.-Ing. Enrico Baumgärtel, Dr.-Ing. Silke Scheerer, Md Sazzadur Rahman, Prof. Dr.-Ing. Steffen Marx

{"title":"Zugversuche an Garnen aus rezyklierten Carbonfasern","authors":"Dipl.-Ing. Enrico Baumgärtel, Dr.-Ing. Silke Scheerer, Md Sazzadur Rahman, Prof. Dr.-Ing. Steffen Marx","doi":"10.1002/best.70007","DOIUrl":"https://doi.org/10.1002/best.70007","url":null,"abstract":"Tensile tests on yarns made from recycled carbon fibers: Semi-finished products for constructionThe demand for the recovery of carbon fibers from old components or the recycling of carbon fiber waste is increasing with the growing use of carbon fibers in many sectors (e.g., automotive, aerospace). Although components reinforced with semi-finished carbon fiber products have already been in operation for several years, the use of recycled or reused carbon fibers (rCF) in the construction sector, especially as concrete reinforcement, opens up a promising opportunity to close the carbon material cycle. In the present study, tensile tests were carried out on yarns made of rCF produced with two different impregnations (thermoplastic and thermoset) and compared with two similarly impregnated yarns made of virgin carbon fibers. The findings indicate substantial disparities in the mechanical properties, particularly in tensile strength and stiffness. These findings signify an inaugural phase in the assessment of rCF yarns for structural applications and underscore the feasibility of subsequent enhancement of rCF processes to attain performance benchmarks commensurate with those of virgin carbon fibers.","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"120 9","pages":"698-706"},"PeriodicalIF":0.8,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197273","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}

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Beton- und Stahlbetonbau aktuell Beton- und Stahlbetonbau 8/2025 混凝土和钢筋混凝土建筑8/2025

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-27 DOI: 10.1002/best.70002

引用次数: 0

Veranstaltungen: Beton- und Stahlbetonbau 8/2025 混凝土和钢筋混凝土工程8/2025

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-27 DOI: 10.1002/best.70005

引用次数: 0

Titelbild: Beton- und Stahlbetonbau 8/2025 混凝土和钢筋混凝土建筑8/2025

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-27 DOI: 10.1002/best.70003

{"title":"Titelbild: Beton- und Stahlbetonbau 8/2025","authors":"","doi":"10.1002/best.70003","DOIUrl":"https://doi.org/10.1002/best.70003","url":null,"abstract":"Am Ersatzneubau der Aurachbrücke an der Österreichischen A 1 Westautobahn zwischen Linz und Salzburg in der Nähe der Anschlussstelle Regau läuft derzeit eine Pilotanwendung für die Verwendung von einbetonierten faseroptischen Sensoren zur Unterstützung der Bauwerksprüfung. Das Bauwerk zeichnet sich nicht nur durch seine Abmessungen und verkehrstechnische Bedeutung, sondern auch durch das komplexe Bauverfahren aus. Der Spannbetondurchlaufträger mit Hohlkastenquerschnitt überspannt mit insgesamt sechs Feldern eine Eisenbahnstrecke, eine Landstraße, den Fluss Aurach und kleinere Straßen und Wege. Die Spannweiten betragen 72 m in den mittleren Feldern und 66 m in den Endfeldern. Im Zuge des Pilotprojekts wurde eine neue Technologie im Brückenmonitoring erforscht, die einen Paradigmenwechsel verspricht. Verschiedene faseroptische Messkabel wurden in der Schalung verlegt und einbetoniert. Mit diversen Geräten, die mit unterschiedlichen physikalischen Effekten arbeiten, wurden daran während des Baus und nach der Verkehrsfreigabe bei dynamischer Anregung sowie unter Verkehr faseroptische Dehnungs- und Temperaturmessungen durchgeführt. So konnten Vorgänge wie die Betonerhärtung, das Absenken des Traggerüsts, das Freisetzen der Pfeiler, der Vorspannvorgang oder die Überfahrt von Lkw nachverfolgt werden. Dehnungen und Rissbreiten werden auf der gesamten Kabellänge, auch in nicht zugänglichen Bereichen, gemessen und können so in Zukunft die Bauwerksprüfung wesentlich unterstützen. Im Forschungsprojekt konnten wertvolle Erkenntnisse zu den Vorund Nachteilen verschiedener Geräte und den Hürden, die bis zu einer breitflächigen Anwendung noch zu überwinden sind, gewonnen werden. Mehr dazu im Beitrag auf den Seiten 568–578. (Foto: AIT Wien)","PeriodicalId":55386,"journal":{"name":"Beton- und Stahlbetonbau","volume":"120 8","pages":""},"PeriodicalIF":0.8,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/best.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905510","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}

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Vorschau: Beton- und Stahlbetonbau 8/2025 混凝土和钢筋混凝土工程8/2025

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-27 DOI: 10.1002/best.70004

引用次数: 0

Inhalt: Beton- und Stahlbetonbau 8/2025 内容：混凝土和钢筋混凝土建筑8/2025

IF 0.8 4区工程技术

Beton- und Stahlbetonbau Pub Date : 2025-08-27 DOI: 10.1002/best.70001

引用次数: 0