Reference : Push-out tests on demountable shear connectors of steel concrete composite structures

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Civil engineering
	Focus Areas :	Sustainable Development
	To cite this reference:	http://hdl.handle.net/10993/41219

Title :	Push-out tests on demountable shear connectors of steel concrete composite structures
Language :	English
Author, co-author :	Kozma, Andras [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Odenbreit, Christoph [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Braun, Matthias Volker [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Veljkovic, Milan [Delft University of Technology > Faculty of Civil Engineering and Geosciences]
	Martin, Nijgh [Delft University of Technology > Faculty of Civil Engineering and Geosciences]
Publication date :	1-Jun-2019
Journal title :	Structures
Publisher :	Elsevier
Volume :	21
Pages :	45-54
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
e-ISSN :	2352-0124
City :	Oxford
Country :	United Kingdom
Keywords :	[en] Demountable shear connectors ; push-out tests ; metal decking ; circular economy ; shear capacity ; experimental study
Abstract :	[en] Circular Economy refers to a move from linear business models, in which products are manufactured from raw materials, used and then discarded, to circular business models where products or parts are re-used, remanufactured or recycled. Structural steel is highly compatible with this concept; however, when steel-concrete composite structures are used, recycling becomes difficult and the potential for reuse is lost. In order to make steel-concrete composite structures reusable, bolted connections should replace the commonly used welded headed studs. Furthermore, the reusable parts should be designed to withstand repeated use. This paper presents a desktop study and the corresponding laboratory experiments on demountable shear connectors that facilitate recyclability and even provide the potential for reusing complete structural elements. In the Laboratory of Steel and Composite Structures of the University of Luxembourg 15 push-out tests have been carried out using different bolted connection systems suitable for multiple use. The shear connectors have been evaluated based on their shear strength, stiffness, slip capacity, ductility and ability of demounting. The investigated systems included pre-stressed and epoxy resin injection bolts, solid slabs and solid slabs in combination with profiled steel sheeting. The results showed that the tested demountable shear connections could provide higher shear resistance than conventional shear connections. The critical failure mode was the shear failure of the bolts, which is a brittle failure. There was no visible damage observed on the connected members. The application of epoxy resin in the hole clearance resulted in lower slip capacity. The outcome provides an important basis for the justification of the forthcoming enhancement and validation of numerical models of the demountable shear connections. The failure behaviour, the observed damages and the resulting ability of the elements for re-use are discussed in detail.
Funders :	European Commission - EC - Research Fund for Coal and Steel
Name of the research project :	REDUCE
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/10993/41219
DOI :	10.1016/j.istruc.2019.05.011

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