Failure Mode Analysis for RC Slab under Explosive Loads

Explosion is a kind of load acted on the buildings with powerful energy and short duration compared with normal loads.RC slabs are the very common members for buildings and they will have different failure modes,which usually include flexural and direct shear ones,with the changes of peak pressure and duration time of explosive load.At first the explosive load on buildings can be simplified into triangle impulse pressure in order to make the simulation easier and then a one-way RC slab under the explosive load can be used as an example to be analyzed by the powerful FEM software-ABAQUS to simulate numerically the behaviors of the slab.The dynamic increasing factor (DIF) and strain rate effect on concrete and reinforcement materials are used.Flexural and shear failure modes as well as strength rules are also applied in the paper.At last the failure modes for the RC slab under the different loads are given by the comparison of analysis results for the same impulsive but different peak pressures and duration time of explosive loading.