Effective stiffness and period-dependent seismic response modification factors for flexure-dominated fully-grouted reinforced masonry rectangular shear walls

•The response of flexure-dominated reinforced masonry shear walls is investigated.•Force based design parameters are evaluated under quasi-static and dynamic loading.•Stiffness reduction factor is proposed considering different design parameters.•Seismic modification factors are compared to US and Canadian standards.•Ductility-related force modification factors based on period are suggested.