A Comparative Study: Seismic Retrofitting of Low- Rise Unreinforced Masonry Walls using Steel Strips and Cable System

Unreinforced masonry walls are widely used in low rise walls to give the lateral strength, stiffness and energy dissipation capacity required to resist both vertical and lateral loads arising from wind or earthquakes. During an earthquake, the wall subjected to seismic load (lateral load) and walls develop shear and flexural stresses. Masonry walls are in-plane failure characterized by a diagonal tensile crack pattern and the out of plane failure, where diagonal cracks are observed along the mortar bed joints. The comparative study of retrofitting techniques is presented in paper using steel strips and steel cable system. Walls are tested under constant gravity load and increased in plane lateral displacement. These tests showed that to the increase strength or ductility of unreinforced masonry walls. Main purpose of the paper is to increase a new strength using seismic retrofitting technique for masonry structure.