Analyses of the loadbearing behaviour of deep‐embedded concrete dowels, CoSFB

Braun, Matthias; Obiala, Renata; Odenbreit, Christoph

doi:10.1002/stco.201510024

Cited by 15 publications

(10 citation statements)

References 2 publications

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“…A high level of sustained load was selected to gain insight into the long-term response of the shear connection when approaching the beginning of its nonlinear behaviour measured from push-out tests, e.g. [31].…”

Section: Overviewmentioning

confidence: 99%

Service and Ultimate Behaviour of Slim Floor Beams: An Experimental Study

et al. 2019

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Slim floor systems represent an economical and competitive solution for building applications that combine the advantages of concrete floors, prefabricated steel sections and a shallow depth. The distinctive feature of this form of construction relies on the fact that the lower steel flange is wider than the top flange to provide a continuous support along the beam length for the slab formwork. The latter is usually specified in the form of either profiled sheeting or cellular slabs. In this structural typology, the steel section is embedded within the thickness of the slab.This paper presents an experimental study aimed at evaluating the service behaviour of slim floor beams induced by the time-dependent behaviour of the concrete and at establishing the possible influence of creep effects on their ultimate response. For this purpose, two slim floor samples were prepared in a simply-supported configuration. Their long-term deflections and deformations were monitored over time for about ten months, after which the specimens were tested to failure. The specimens possessed identical concrete and steel geometries. The shear connection was provided by transverse steel reinforcing bars installed within regularly spaced holes incorporated in the steel web. The samples were cast unpropped so that the self-weight of the wet concrete was carried by the steel member. The only difference between the two specimens consisted in the loading history specified over time. In particular, one slim floor sample was kept unloaded for the entire duration of the test to monitor the influence of shrinkage effects while the second specimen was subjected to a sustained load to evaluate the effects of both creep and shrinkage. The experimental data reported in this study provides insight into their long-term and ultimate response, and valuable benchmarking data for the calibration of numerical models and design procedures related to the serviceability and ultimate limit states of slim floor systems.

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Section: Overviewmentioning

confidence: 99%

Service and Ultimate Behaviour of Slim Floor Beams: An Experimental Study

et al. 2019

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“…The complete technical information (geometry, boundary conditions, materials, etc.) is available in relevant documents [2], [3] and [7]. The numerical investigation was performed using Abaqus v6.13 finite element modelling software [8].…”

Section: Calibration Of the Numerical Modelmentioning

confidence: 99%

Semi-continous beam-to-column joints for slim-floor systems in seismic zones

Ciutină

Vulcu

Don

2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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The slim-floor building system is attractive to constructors and architects due to the integration of steel beam in the overall height of the floor, which leads to additional floor-to-floor space, used mostly in acquiring additional storeys. The concrete slab offers natural fire protection for steel beams, while the use of novel corrugated steel sheeting reduces the concrete volume, and replaces the secondary beams (for usual spans of steel structures). Currently the slim-floor solutions are applied in non-seismic regions, and there are few studies that consider continuous or semi-continuous fixing of slim-floor beams. The present study was performed with the aim to develop reliable end-plate bolted connections for slim-floor beams, capable of being applicable to buildings located in areas with seismic hazard. It is based on numerical finite element analysis, developed in two stages. In a first stage, a finite element numerical model was calibrated based on a four point bending test of a slim-floor beam. Further, a case study was analysed for the investigation of beam-to-column joints with moment resisting connections between slim-floor beams and columns. The response was investigated considering both sagging and hogging bending moment. The results are analysed in terms of moment-rotation curve characteristics and failure mechanism.

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“…Hauptaugenmerk lag auf der Analyse der Beanspruchung der Dübelbewehrung, dem Zeitpunkt der Aktivierung von Querkräften und Biegemomenten. mulation von CoSFB-Dübeln wurden bereits publiziert[26,27]. Die Simulation der Push-out-Versuche stellt ein hochgradig nichtlineares Problem dar, mit Material-und Kontaktnichtlinearitäten und lokal großen Verformungen.…”

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Tragverhalten von CoSFB‐Dübeln

et al. 2019

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Kennzeichnend für die Slim‐Floor‐Bauweise ist die Integration von Deckenträgern in die Decke. Wird eine Verbundtragwirkung zwischen Stahlträger und Betondecke aktiviert, so führt dies zu einem signifikanten Zuwachs an Steifigkeit und Tragfähigkeit des Trägers, wodurch größere Trägerspannweiten ermöglicht werden. Als Verbundmittel bieten sich hierzu sogenannte „CoSFB‐Dübel” an. Diese bestehen aus Bewehrungsstäben, die bauseits durch Bohrungen im Trägersteg geführt und auf der Baustelle mit Beton vergossen werden. Der vorliegende Aufsatz präsentiert eine Methode zur Bestimmung der Tragfähigkeit dieser CoSFB‐Dübel. Mittels einer detaillierten Auswertung von Push‐out‐Versuchen und umfangreicher numerischer Simulationen der einzelnen Versuche konnten die zur Beschreibung der Traglast maßgebenden Einflussgrößen bestimmt werden. Basierend auf den so gewonnenen Erkenntnissen wurde eine vereinfachte, analytische Formulierung der Tragfähigkeit der CoSFB‐Dübel hergeleitet.

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Analyses of the loadbearing behaviour of deep‐embedded concrete dowels, CoSFB

Abstract: The development of the " CoSFB-Betondübel" is presented in

Cited by 15 publications

References 2 publications

Service and Ultimate Behaviour of Slim Floor Beams: An Experimental Study

Service and Ultimate Behaviour of Slim Floor Beams: An Experimental Study

Semi-continous beam-to-column joints for slim-floor systems in seismic zones

Tragverhalten von CoSFB‐Dübeln

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