Title: Modelling of shallow composite slabs behaviour

Author(s): A. Byrdy

Publication: KILW

Volume: 54

Issue: 2

Appears on pages(s): 333-347

Keywords: slabs

DOI:

Date: 4/1/2008

Abstract:
Composite slabs consist of a thin-walled profiled steel sheeting, reinforcement and in-situ cast concrete. The profiled sheeting acts as permanent formwork and once the concrete has hardened as an outer reinforcement. Unlike a bar reinforcement, the sheeting does not benefit from being totally embedded in concrete. Partial connection between the sheeting and concrete takes place after adhesion is broken. Composite slab design is usually based on parameters of partial connection obtained from full scale bending test. The objective of this paper is to analyse composite slabs which fail in longitudinal shear. This paper presented analysis of composite slabs behaviour based on FE simulations and data from tests which have been made. In the paper a nonlinear 3-D analysis of composite slab with partial interaction between steel thin walled sheeting and concrete has been performed, compared to experimental results and simplified engineering methods. Material and interaction properties have been determined from full scale tests. Cracking and plasticity of concrete, plasticity in the sheeting, and friction between concrete and sheeting are included in the numerical model. Proposed computational model can be applied to the verification of composite slabs resistance made of re-entrant profiles. Presented in the paper FE model of composite slabs behaviour could provide a better understanding of the problem of horizontal shear resistance in composite slabs' design.