Shear-Bond Behaviour of Steel-Fibre Reinforced Concrete (SFRC) Composite Slabs with Deep Trapezoidal Decking: Experimental Study

This paper describes part of an on-going research project within the Centre for Infrastructure Engineering and Safety at UNSW on an investigation of the strength behaviour of SFRC composite slabs having deep steel trapezoidal decking. It describes three groups of short-term load tests on single-span SFRC composite slabs, the test methodology being adopted from Eurocode 4 for the determination of the values of the parameters m and k. The aim of the tests was to study the effect of the presence of steel fibres to the longitudinal shear-bond strength at the interface between the steel profiled sheet and the SFRC concrete slab. The load-deflection responses and the end slips were closely monitored in order to gain a clear insight into the shear-bond behaviour of the test specimens. The concrete properties, including its compressive strength, tensile strength, modulus of elasticity and fracture energy were measured on companion specimens for every test group. The results were used to calculate the longitudinal shear bond strength by using partial interaction theory to provide benchmark experimental results.