References of "Braun, Matthias"
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See detailTragverhalten von CoSFB-Dübeln
Braun, Matthias; Obiala, Renata; Schäfer, Markus UL et al

in Stahlbau (2019), 88(2019)(Heft 7),

Slim-floor or shallow floor construction is characterized by the integration of a steel beam into a slab. The activation of a composite action between the steel section and the concrete slab leads to a ... [more ▼]

Slim-floor or shallow floor construction is characterized by the integration of a steel beam into a slab. The activation of a composite action between the steel section and the concrete slab leads to a significant increase of the bending capacity and the stiffness of the beam, allowing for larger beam spans. This paper presents a fundamentally new method for assessing the load-bearing capacity of CoSFB-Dowels, which ensures a composite action of a composite slim-floor beam (CoSFB). Based on detailed analysis of push-out tests, extensive numerical simulations were performed in order to identify the contribution of various parameters on the load-bearing capacity. Finally, an analytical formulation of the load-bearing capacity is presented, which has been derived by applying a simple second order plasticity approach. [less ▲]

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See detailEntwicklung der Slim-Floor-Bauweise in Europa
Schäfer, Markus UL; BRaun, Matthias

in Stahlbau (2019), 88(2019)(7),

Slim-floor or also called shallow floor construction represents innovative composite beam systems for multi-storey buildings. These are rolled or welded steel profiles fully or partially integrated into ... [more ▼]

Slim-floor or also called shallow floor construction represents innovative composite beam systems for multi-storey buildings. These are rolled or welded steel profiles fully or partially integrated into the concrete slab. This construction method constitutes one of the most recent developments in steel-concrete composite construction and has become increasingly important in the last two decades. In this article, the construction method is explained as well as its development. [less ▲]

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See detailChancen und Herausforderungen für Stahl-Verbundkonstruktionen im modernen Geschossbau
Schäfer, Markus UL; Braun, Matthias

in Stahlbau (2019), 88(7),

Aus dem Trend der Urbanisierung und dem Anstieg von Investitionen in den Wirtschaftszentren Europas resultiert ein rasantes Wachstum. Damit einher geht eine immense Nachfrage nach entsprechenden ... [more ▼]

Aus dem Trend der Urbanisierung und dem Anstieg von Investitionen in den Wirtschaftszentren Europas resultiert ein rasantes Wachstum. Damit einher geht eine immense Nachfrage nach entsprechenden Nutzflächen sowie der zugehörigen Infrastruktur. In den großen Ballungsgebieten, den Hotspots der Wirtschaft, wird der Bedarf an Mehrgeschossbauten und Hochhäusern stark ansteigen.Dabei stellen sich neue Herausforderungen. Die Bauindustrie muss sich mit zukunftsorientierten Bauweisen unter Einbeziehung des Klimaschutzes und insbesondere der Ressourceneffizienz ernsthaft auseinandersetzen und neue Ansätze jenseits traditioneller Bauweisen finden. Da ca. 33 % des gesamten Rohstoffverbrauchs mit der Bauwirtschaft verbunden sind, müssen nachhaltige, effiziente und marktfähige Bautechnologien in den Fokus gerückt werden. Darüber hinaus gewinnt die Optimierung der Baustellenorganisation und Logistik sowie industrieller Vorfertigung vermehrt an Bedeutung... [less ▲]

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See detailNumerical evaluation of the plastic hinges developed in headed stud shear connectors in composite beams with profiled steel sheeting
Vigneri, Valentino UL; Odenbreit, Christoph UL; Braun, Matthias

in Structures (2019)

For composite beams using novel steel sheeting, the current Eurocode 4 rules sometimes overestimate the load-bearing capacity of headed stud shear connectors. This is due to the larger rib heights and the ... [more ▼]

For composite beams using novel steel sheeting, the current Eurocode 4 rules sometimes overestimate the load-bearing capacity of headed stud shear connectors. This is due to the larger rib heights and the smaller rib widths in comparison with the old studies, which have been carried out to calibrate the current design equations. The RFCS Project “DISCCO” investigated this phenomena and the working group under mandate M515, CEN/TC250/SC4/SC4.T3 is enhancing this equation and working on a proposal to be taken over in the new version of Eurocode 4. The proposed new equation covers the failure behaviour of the shear connection more in detail. The test results show, that the failure consists in a combined concrete cone and stud in bending. Due to the geometry of novel steel sheeting, the load bearing capacity of the headed stud shear connector is no more limited by its shear capacity, but by its bending capacity. A 3D non-linear finite element model is developed and validated through the support of the DISCCO push-out tests. A good agreement between numerical and experimental results in terms of force-slip behaviour is achieved. Special attention of this work lies on the numerical evaluation of the number of plastic hinges n y : a stress-based procedure is presented and the results are compared to the equations presented for new Eurocode 4. The numerical simulations show that the upper plastic hinge moves up as the slip increases due to the progressive crushing of the concrete in the rib. From the parametric study, it turns out that n y is linearly proportional to the embedment depth. Compared to pre-punched hole decking, through-deck welding specimen activates less plastic hinges in the studs because of the higher stiffness provided at the base of the stud. [less ▲]

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See detailSymbiose aus Stahl und Stein - innovative Lösungen
Schäfer, Markus UL; Braun, Matthias; Radermacher, Christoph et al

in Revue Technique Luxembourgeoise (2016), 04/2016

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See detailEine innovative Stahlverbundlösung für komplexe innerstädtische Bauprojekte
Schäfer, Markus UL; Radermacher, Christoph; Braun, Matthias et al

in Stahlbau - Nachrichten (2016), 04/16

The real estate project KONS encountered a two and a half year process of demolition of an existing building and construction of a new building complex in a central, urban location of Luxembourg City ... [more ▼]

The real estate project KONS encountered a two and a half year process of demolition of an existing building and construction of a new building complex in a central, urban location of Luxembourg City opposite of the main railway station. Thereby the ambitious specifications of the investor as well as the requirements of the local authorities could be met only through a comprehensive and intelligent planning process. The complex interrelation between logistics and construction management processes, detailing and overall economic assessment found the solution of steel-composite design highly performant and efficient in every aspect. [less ▲]

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See detailSymbiose aus Stahl und Stein
Schäfer, Markus UL; Radermacher, Christoph; Braun, Matthias et al

in Stahlbau (2016), Stahlbau 85(Heft 10), 659-669

The real estate project KONS encountered a two and a half year process of demolition of an existing building and construction of a new building complex in a central, urban location of Luxembourg City ... [more ▼]

The real estate project KONS encountered a two and a half year process of demolition of an existing building and construction of a new building complex in a central, urban location of Luxembourg City opposite of the main railway station. Thereby the ambitious specifications of the investor as well as the requirements of the local authorities could be met only through a comprehensive and intelligent planning process. The complex interrelation between logistics and construction management processes, detailing and overall economic assessment found the solution of steel-composite design highly performant and efficient in every aspect. [less ▲]

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See detailAnalyses of the loadbearing behaviour of deep-embedded concrete dowels, CoSFB
Braun, Matthias; Obiala, Renata UL; Odenbreit, Christoph UL

in Steel Construction (2015), 8(3), 167-173

The development of the “CoSFB-Betondübel” is presented in this paper. The “CoSFB-Betondübel” is a deep-embedded concrete dowel connecting in situ concrete with a steel section to assure composite action ... [more ▼]

The development of the “CoSFB-Betondübel” is presented in this paper. The “CoSFB-Betondübel” is a deep-embedded concrete dowel connecting in situ concrete with a steel section to assure composite action and thus allow for composite beam design. The loadbearing behaviour and parameters influencing this behaviour were determined through experimental tests. Special focus was given to the influence of the ratio of the resistance of the concrete dowel to the concrete compression class. The evaluation of the results concluded in a National Technical Approval [1]. Further investigations were performed via FE analysis in ABAQUS. Further, 3D models with non-linear material and geometry were prepared and validation undertaken. In addition, a real application example of CoSFB is shown. [less ▲]

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See detailInfluence of Semi-Continuous Composite Joints on the Natural Frequency and Deflection of Composite Beams
Duarte Da Costa, Job UL; Braun, Matthias; Odenbreit, Christoph UL

in ICASS'2015 International conference series on Advances in Steel Structures & IJSSD 2015 Symposium on Progress in Structural Stability and Dynamics (2015, July)

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See detailInnovative conception and design of structural systems for flexible floor spaces
Odenbreit, Christoph UL; Hechler, Oliver UL; Braun, Matthias

in ICSA2013 - Conference book (2013, July)

The pressure in the market of high-rise and multistory office buildings is stimulating innovative solutions for the design of structural systems fulfilling the demand for flexible, sustainable floor ... [more ▼]

The pressure in the market of high-rise and multistory office buildings is stimulating innovative solutions for the design of structural systems fulfilling the demand for flexible, sustainable floor layouts. Steel-concrete composite constructions do comply with related challenges. They offer a wide range of structural solutions to design economic, efficient and sustainable buildings. New composite slabs with sheets of up to 220 mm height are able to span up to 9 m without any intermediate support. These sheets can further be placed on the lower flange of the steel beam to reduce the slab thickness in order to build a "Slim-Floor System". By activating composite action for slim-floor beams due to recent innovations grid spans of about 10 x 14 m are enabled, permitting a huge flexibility in the architectural floor layout. Further the design of composite connection provides significant potential for structural optimization. This potential is outlined and design guidance for simplified and sustainable composite design is given. [less ▲]

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