SEISMIC PERFORMANCE OF MID-RISE RC COMPOSITE SHEAR WALLS WITH CONCEALED STEEL TRUSS

In order to investigate the aseismic performance of mid-rise RC composite shear walls with concealed steel truss,the low-frequency quasi-static cyclic loading experiments on six 1/3 scale mid-rise shear walls,including two usual shear walls,two shear walls with concealed steel frame and two shear walls with concealed steel truss,were carried out.The shear wall specimens were given an axial compression ratio of 0.2 or 0.5.Based upon the experimental study,load-carrying capacity,the stiffness,ductility,hysteretic property,energy dissipation capacity and failure phenomena of each shear wall were comparatively analyzed.The experimental results show that compared with the usual shear walls,the seismic performance of the shear wall with concealed steel truss is obviously improved.Compared with the shear walls with low axial compression ratio,the load-carrying capacity of the shear walls with high axial compression ratio is significantly improved,but its ductility and energy dissipation capacity are decreased.