| Composite steel plate shear wall(C-SPW)consists of steel plate with reinforced concrete encasement on one or both sides of the steel plate using headed studs.The encased concrete panels mainly provide lateral restraint for the buckling of steel plate,in order to prevent overall buckling of the steel plate prior to its shear yielding.As a new type of efficient lateral load resisting system,C-SPW has great strength and stiffness and a broad application prospect in high rise steel structure.The thickness demand of concrete panel is an important design parameter affecting the performance of C-SPW.In this paper,considering the effects of concrete panel thickness,steel plate thickness and aspect ratio of C-SPW,40 C-SPW finite element models under monotonic lateral load are designed for elastic-plastic buckling analysis.The behavior of C-SPW,and the shear share of infill steel plate and concrete panels are studied.The critical drift ratio corresponding to the onset of infill steel plate buckling is obtained by the analysis on the response of infill steel plate.Let the critical drift ratio be equal to the elastic drift limit 0.4% of high-rise steel structures,the critical concrete panel thicknesses are captured.Based on the comparison between the critical concrete thicknesses from finite element analysis and the concrete thicknesses of simplified theoretical formula,an available formula for the concrete thickness demand in the design of C-SPW is proposed. |
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