Quasi-static cyclic experiment is conducted

in which six full-scale unreinforced brick masonry walls are subjected to out-of-plane uniform loading by using a system of airbags.The analysis of failure characteristics

crack patterns

ultimate strength and dissipation capacity

stiff degradation

and energy dissipation ability of the walls are presented in this paper.The influences of width of walls

vertical compression and strengthening measures are also discussed.The results indicate that the fracture lines of walls are similar to the yield lines of a 3-way reinforced concrete slab.The walls can still keep larger displacement without collapsing after cracking

the vertical load can improve the initial stiffness and cracking strength

width increases can decrease the cracking strength and dissipation capacity

and the dissipation capacity of the wall can be increased after reinforced by the precast concrete slab at the corner

especially reinforced by the constructional column in the middle of wall.