Experimental Investigation on Seismic Behavior of ShortLeg SteelConcreteSteel Composite Shear Walls

Abstract:

Four shortleg steelconcretesteel composite shear wall specimens with shearspan ratio of 1.0 and 2.0 under monotonic and cyclic loading, were designed to investigate their failure mode, ductility, stiffness, loadbearing capacity and energy dissipation. The experimental results indicated that four composite walls failed in a flexuredominated mode, undergoing concrete cracking, steel faceplate buckling and yielding, concrete crushing, steel faceplate fracture. The composite walls showed good deformation capacity with ductility coefficient more than 3.0. The wall with shearspan ratio of 2.0 had better ductility than the wall with shearspan ratio of 1.0. Compared with the wall under monotonic loading，the loadbearing capacity and ductility coefficient for the wall under cyclic loading were reduced by more than 10%. The wall under cyclic loading showed severer buckling of steel faceplates and damage of concrete, which reduced its energy dissipation. Structural measures to prevent buckling of steel faceplates are discussed.