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Abstract
This paper investigates the behaviour of C-shaped and L-shaped angle shear connectors embedded in solid concrete slabs. An effective finite element model is proposed to simulate the push out tests of these shear connectors that encompass nonlinear material behaviour, large displacement and damage plasticity. The finite element models are validated against test results. Parametric studies using this nonlinear model are performed to investigate the variations in concrete strength and connector dimensions. The finite element analyses also confirm the test results that increasing the length of shear connector increases their shear strength proportionately. It is observed that the maximum stress in L-shaped angle connectors takes place in the weld attachment to the beam, whereas in the C-shaped angle connectors, it is in the attached leg. The location of maximum concrete compressive damage is rendered in each case. Finally, a new equation for prediction of the shear capacity of C-shaped angle connectors is proposed.
Highlights
Composite beams are recognized for their high strength and stiffness and reliable structural behaviour
The aim of this paper is to develop a finite element model for the angle connectors that can match the results of the experiments with good accuracy
The load–slip curves for specimens from laboratory tests are compared against the finite element simulations for the C-shaped angle connectors
Summary
Composite beams are recognized for their high strength and stiffness and reliable structural behaviour. The strength and ductility of shear connectors play a vital role in the design of composite beams. The successful design of shear connectors relies heavily on the existing experimental investigations on the load-slip behaviour of the connector. Many forms of shear connectors are being used in composite beams, economical and structural aspects motivates new innovations like C-shaped and L-shaped angle shear connectors. Present knowledge of the load–displacement behaviour and the shear capacity of shear connectors are mainly limited to the data obtained from the experimental push-out or beam tests [1,2,3]. Experimental tests are expensive and time-consuming option for such investigations and in some cases can even be impractical
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