Influence of Constitutive Models on the Behaviour of Clay Brick Masonry Walls Against Multi Hit Impact Loading

Abstract

Masonry structures are sensibly vulnerable against low velocity out of plane impacts caused due to vehicular collision, rockfalls, debris impact. Sometimes, these impacts cause severe consequences hence methods are developed based upon experimental investigations to assess the response of wall systems. However, in experiments, physical limitations are present accompanied by the increased cost of the study hence computational analysis of masonry structural systems are being used widely. In this manuscript, an attempt has been made to exploit the constitutive models available in ABAQUS in-built library for the modelling of masonry walls. The response of walls subjected to multiple hits were studied experimentally and validated numerically using Drucker Prager (DP), Mohr-coulomb (MC) and concrete damage plasticity model (CDP). It was observed that among chosen models, MC model overpredicts the structural response of walls measured in terms of contact force whereas DP and CDP model predicts the contact force under 10% deviation from experimental results. Further, the CDP model was able to simulate the crack within brick units whereas DP and MC model were able to simulate joint failure only. It was concluded that DP and CDP models can be adopted for simulating the structural response of masonry walls subjected to multiple hits.