Experimental study on cyclic shear performance of steel plate shear wall with different buckling restraints

Abstract

The buckling-restrained cold-formed steel plate shear wall (SPSW) is a new type of shear wall that integrates building and structural functions. It consists of an embedded steel plate, hat-section steel strips, two thermal and sound insulation layers, two oriented strand board (OSB) plates. In order to study the cyclic shear performance of SPSW with different buckling restraints, six SPSW specimens with different buckling restraints and one SPSW specimen without buckling restraints were tested with hinged frame. The test results showed that the hat-section steel strips (i.e. stiffeners) can significantly decrease the outward buckling deformation of the embedded steel plate, thus preventing the formation of tension field on the diagonal direction of SPSW and improving the energy dissipation capacity, ductility and bearing capacity of the SPSW. Among all the specimens, the cross-shaped buckling restraints has the highest efficiency in improving the bearing capacity of the SPSW, followed by the X-shaped. In addition, as the number of steel strips increases, the restraint effect of steel strips, the energy dissipation capacity and the plastic deformation performance of specimens are also gradually improved. Finally, the shear capacities of all SPSW specimens are calculated by according to existing international design standards. As can be seen from the results, the design rule in AISC is the most conservative, while the design method of Eurocode 8 is most accurate.