Advanced Steel Construction

Vol. 14, No. 3, pp. 392-411(2018)


FINITE ELEMENT ANALYSIS OF

DEMOUNTABLE STEEL-CONCRETE COMPOSITE BEAMS

UNDER STATIC LOADING

 

V.I. Patel1,2* , B. Uy2,3, S.W. Pathirana2, S. Wood2, M. Singh2 and B. T. Trang2

1School of Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia

2Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, The University of New South Wales, NSW 2232, Australia

3School of Civil Engineering, The University of Sydney, Sydney, NSW 2006, Australia

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 29 August 2016; Revised: 23 June 2017; Accepted: 20 August 2017

 

DOI:10.18057/IJASC.2018.14.3.5

 

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ABSTRACT

This paper investigates the innovative beam-slab connectors to enable steel-concrete framed structures to be made demountable. A computational simulation for determining the fundamental performance of the demountable composite beams with hollow core concrete slabs, profiled steel deck and bolted shear connectors is developed using the computational code ABAQUS. This numerical model was employed to compare the strength, stiffness and ductility of conventional composite beams utilising welded shear connectors with that of demountable steel-concrete beams utilising blind bolts. The bolted shear connectors not only overcome problems that prevent rehabilitation of existing composite beams with headed studs but also allow for the demountability in the composite beams. The adequacy of the developed computational models is evaluated by verifying the computational results against the corresponding experimental performance. The verification demonstrates that the computational simulations agree with the test performance. The numerical prediction indicated that the shear capacity of blind bolts used in demountable composite metal decking slabs is higher than that of welded connectors utilised in the conventional steel-concrete composite beams. It is found that the composite beams with bolted connectors can be made demountable up to a load of about 50% of the ultimate load which is greater than typical service loads. The strength of shear connectors obtained from the finite element models and experiments were compared with the predicted strength using Eurocode 4 and AS2327.1-2003. It appears that Eurocode 4 and AS2327.1-2003 provide the conservative solutions for the design of shear connector strengths.

 

KEYWORDS

Demountable composite beams, bolted connectors, finite element analysis, profile slabs, solid slabs, blind bolts


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