CYCLIC LOADING TEST ON COLD-FORMED STEEL-STIFFENED STEEL PLATE SHEAR WALLS

Steel plate shear wall is a new type of lateral resistant system used in high-rise building structure which provides stable bearing capacity in inelastic stage. However, experimental studies show that the excessive out-of-plane buckling deformation of thin steel plate shear wall results in weak energy dissipation capacity, which is reflected in the pinching of load-displacement hysteretic curve. This paper presents the cold-formed steel-stiffened steel plate shear wall. In order to evaluate the seismic behavior of the cold-formed steel-stiffened steel plate shear wall, three specimens were tested under low-cycle reversed shear load. The test results indicate that the cold-formed steels can effectively reduce the out-of-plane deformation of the steel plate shear wall; With the arrangement and the increasing number of the cold-formed steels, the energy consumption of the structure is enhanced; The cold-formed steels bring steel plate shear wall the enhancement of the initial stiffness, the ultimate bearing capacity and ductility. Based on these studies, the cold-formed steels can play a role in restraining buckling and improving the seismic behavior of steel plate shear wall.