Experimental Studies on Structural Behaviour of Composite Slabs

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Experimental Studies On Structural Behaviour Of Composite Slabs

Experimental Studies on Structural Behaviour of Composite Slabs

Abstract

This Experimental Studies On Structural Behaviour Of Composite Slabs flooring system is increasingly being used in developing countries such as India due to the innate advantage of these systems. Three modes of failure have been identified in composite slabs such as flexural, vertical shear and longitudinal shear failure. During the tests, two stages, brittle and ductile phases were observed. The cyclic load appears to have less effect on the composite slab’s ultimate shear strength.

Twelve slab specimens with variable shear span and two profiled steel deck types were tested under four point loading. The performance of ECC and SCC composite slabs is compared based on load-deflection response, concrete and steel stress development, failure modes, energy-absorbing capacity and steel-concrete shear bond parameters (m and k) and bond stress.

However, the steel strain did not reach yield strain in most of the composite slabs. Compared to their SCC counterparts, ECC slabs generally developed higher steel strain. The use of studs in P3623 slabs (both SCC and ECC) reduced the development of strain in pre-peak load response although the effect of stud in post-peak strain development was not conclusive. ECC slabs also developed higher concrete strain before failure compared to SCC with higher ECC strain hardening capacity.

The methods of m–k and partial shear connection were analyzed. Two different profiled steel sheeting types were considered with up to three different thicknesses. The experimental determination of these parameters must satisfy certain Eurocode requirements. These requirements penalize experimental results, so in some cases they can be very conservative. The present study investigated the influence of such requirements on the estimated longitudinal shear carrying capacity and provided results that lead to a better understanding of the shear-bond behavior of composite slabs.

Conclusion

Based on the results on the experimental investigation, the following conclusion is arrived.

  • The energy absorption capacity of the steel concrete composite slab without shear connector and conventional slab is found to be 242 kN.m and 182 kN.m. Energy absorption capacity of composite slab more than conventional slab.