seismic behaviour factor for unreinforced concrete block masonry walls

This paper reports on experimental and numerical investigations of the seismic behaviour of unreinforced concrete block masonry (urcbm) structural walls. the behaviour factor (r) components are extracted from nonlinear static pushover analyses of full-scale masonry walls having different aspect ratios and boundary conditions. it is found that r-value of masonry shear wall increase with an increase in the aspect ratio of the wall. also, based on the findings, r-values of 2.0 and 3.0 are proposed for restrained and cantilever urcbm shear wall construction, respectively.