Seismic Behaviour of Unreinforced Masonry

The present paper assesses the safety of existing unreinforced building subjected to earthquake loading, considering uncertainty associated with various material properties. A static pushover analysis was carried out on an equivalent frame model of selected clay and fly ash brick masonry walls using two different load pattern as per ASCE/SEI 41-17. Uncertain material properties that affect the response significantly are identified through sensitivity analysis. The study shows the effect of brick type and mortar grade on the seismic performance of brick masonry wall. It was found from the study that masonry density, elastic modulus, Poisson's ratio and shear bond strength are the most important material properties which affect the output response.