Research On Mechanical Behavior And Design Method Of Corrugated Infilled Plates In Steel Plate Shear Wall

As a new lateral resisting system,corrugated steel plate shear walls(CoSPSWs) have good stability bearing capacity and energy consumption capacity,and can be used in the lateral resisting system of high-rise buildings.Based on finite element analyses,the buckling performance,lateral bearing capacity and energy dissipation capacity of the infilled corrugated panels in CoSPSWs were studied,and preliminary design formulae were proposed.Firstly,this paper studied the elastic shear buckling of CoSPSWs.The elastic buckling mode and buckling load of CoSPSWs were analyzed,and the existing calculation formulae of elastic buckling load were studied based on elastic theory of the orthotropic plate.The results showed that the CoSPSWs has two modes of global buckling and local buckling,while the interactive buckling is not obvious.The amplitude and thickness of the corrugated plate are the key parameters affecting the buckling mode and elastic buckling load.Secondly,the mechanical behavior of the wall panel and frame of the CoSPSWs were studied,and influences of the aspect ratio,the aspect ratio,the corrugation ratio,the number of corrugations and the axial compression ratio of the frame columns on lateral bearing capacity were investigated.Then the design formulae of the lateral bearing capacity of the corrugated infilled panel and the additional internal forces of the frame column were proposed.The research results showed that changing the corrugation ratio and the number of corrugations of the infilled plate can significantly improve the lateral bearing capacity.The ultimate bearing capacity and residual bearing capacity of the shear wall can be obtained by using the regularized aspect ratio and the design formulae.For the frame column,the internal forces can be calculated based on the maximum shearing force of the infilled panel and the plastic bending moment of the column;Within the normal axial compression ratio range,the influence of the axial compression of the column on the lateral bearing capacity of the infill panel can be ignored.Finally,the hysteretic behavior of infilled corrugated panels in CoSPSWs was studied,including the energy dissipation capacity,bearing performance,stiffness evolution and other performance indexes under low-cycle reciprocating load,which was compared with the steel plate shear walls(SPSWs).The results indicated that the corrugated panels has much larger initial lateral stiffness,more plump hysteresis loops and better energy consumption than the non-stiffened thin flat plate.Additionally,increasing the amplitude or the number of corrugations can improve the energy consumption of corrugated panels.