Seismic Performance of CSEB Masonry Building

Abstract

The study aims to evaluate the seismic performance of Compressed stabilized earthen block (CSEB) masonry building with and without earthquake resistant features. FEM based structural analysis software ANSYS was used to model and analyse the structures. The building is modelled with macromodelling approach and SOLID65 element was selected to represent the nature of the masonry. Linear and non-linear static analyses were conducted for both models. The nonlinear concrete model based on William-Warnke failure criteria was used. The pushover curves were developed for the normal masonry building (M1) and the timber reinforced masonry building (M2) to compare the seismic performance. The performance level of buildings was assessed using procedures stated in FEMA 356. The seismic analyses showed that the building model M2 having earthquake resisting features performed well during the earthquake. The first mode time period is decreased by 41.7%, the capacity is increased by 64.62% in x direction and 66.5% in y direction after addition of the reinforcement in M1 model. The performance level was at collapse stage (CO) in the unreinforced model in transverse direction, while, it was in range between immediate occupancy (IO) and life safety (LS) level after addition of timber reinforcement.