Abstract
In the present study, the seismic behaviour of concrete-filled double-steel-plate (CFDSP) composite shear walls was numerically and theoretically investigated. Finite element (FE) models of CFDSP composite shear walls were designed, validated, and analyzed. Based on the FE models, the influence of the width-to-thickness ratio, height-to-width ratio, axial compression ratio, thickness of steel plates, number of stiffeners and spacing of shear studs on the seismic behaviour of CFDSP composite walls was also investigated. The failure mode, hysteretic curve, skeleton curve, stiffness, shear-bearing capacity, and ductility of CFDSP composite shear walls are discussed. It was revealed that CFDSP composite shear walls make full use of the steel and concrete materials and exhibit excellent seismic performance. Additionally, a restoring force model for describing the hysteretic behaviour of CFDSP composite shear walls has been proposed and discussed. The predicted hysteretic curves obtained from the restoring force model are in good agreement with the test results. This research confirmed that CFDSP composite shear walls are suitable lateral resisting members of high-rise buildings.
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