2019 CSCE Annual Conference - Laval (Greater Montreal) Conference
Dr. Khaled Galal, Concordia University
Recent research efforts toward enhancing the lateral performance of reinforced masonry shear walls (RMSW) were reflected in the current Canadian National Building Code and masonry design standards by introducing a new ductile RMSW category with a seismic ductility-related force modification factor, Rd, of 3.0. Consequently, this promotes RMSW as a potential seismic force resisting system (SFRS) alternative in mid-rise buildings. One way of increasing reinforced masonry shear walls ductility is by adding confined boundary elements to the walls’ end zones to enhance the ultimate compressive strain and wall curvature ductility. In this study, six half-scale RM walls with boundary elements specimens, flexural dominated, were constructed in two phases to be tested under a reversed cyclic moment and lateral loading. These walls represent the plastic hinge zone located in the lower one-and-a-half story of a 10-story RM shear wall building. The wall’s boundary elements are varied in size as well as vertical and transverse reinforcement ratios. This paper presents the experimental work and focuses on quantifying the effect of changing the boundary element size on wall’s lateral capacity, ductility ratio, maximum compressive strain, in-plane mode of failure, stiffness degradation and amount of dissipated energy.