Study on seismic behavior of stiffened perforated prefabricated steel-concrete composite shear wall

In order to solve the connection problem between steel plate composite shear walls and non structural parts of buildings, and to make steel plate composite shear walls more universal in engineering applications, seismic performance of a new stiffened opening steel-concrete composite shear wall formed by welding split screws with concave stamping parts was investigated. Quasi-static tests on nine specimens were carried out, considering the influences of opening layout, set concealed columns, axial compression ratio and other parameters on the bearing capacity, ductility, energy dissipation and other properties of the member. The test results show that: all the stiffened perforated steel-concrete composite shear walls show compression bending failure mode, full hysteretic curves, good ductility and high energy dissipation capacity. The different layout of openings has little influence on the bearing capacity of the members and has a great influence on the ductility of the members. Setting concealed columns can effectively improve the bearing capacity and ductility of the members. When the axial compression ratio increases from 0. 3 to 0. 4, the ductility of the stiffened perforated steel-concrete composite shear walls decreases, but it has little effect on the bearing capacity of the walls. Based on the experimental research, the skeleton curve and the restoring force model of the stiffened perforated double steel-concrete composite shear wall were established, and the degenerated trilinear restoring force model had been optimized. The skeleton curve and hysteretic curve obtained from the model are in good agreement with the test results. The model can provide a basis for the practical engineering application of stiffened perforated steel-concrete composite shear walls. © 2023 Science Press. All rights reserved.