The Nonlinear Analysis Of Seismic Performance Of Steel Plate Shear Wall

The steel plate shear wall structure consists of an edge frame mainly for vertical load and an embedded steel plate for horizontal load.It makes full use of the advantages of the frame structure and the embedded steel plate,which can make the two work together.The steel plate shear wall structure has a wide range of research and application at home and abroad because of the advantages of its high elastic stiffness,good seismic performance,low weight and fast construction speed,etc.In order to provide some reference for the practical application of the steel plate shear wall,in the paper,the nonlinear analysis on the seismic behavior of the steel plate shear wall was carried out by using the nonlinear finite element software ABAQUS and the cyclic constitutive relation,through the parametric analysis to determine the effects of various parameters on the seismic performance of the steel plate shear wall.The main research contents and conclusions of the paper are as follows:(1)Through the force analysis of the steel plate shear wall,the theoretical calculation formula of the ultimate bearing capacity of the embedded steel plate and the minimum stiffness requirement of the edge frame column were obtained.(2)Based on the existing pseudo-static experimental results of the steel plate shear wall,the test specimen was simulated by the finite element software in the paper,whose skeleton curve,hysteretic curve and failure mode of the model had been obtained before the bearing capacity,ductility,hysteretic behavior and failure mode of the model were studied.The comparative analysis shows that the numerical simulation results are in good agreement with the experimental results,which lays a foundation for the further parametric analysis.(3)In order to carry out the parametric analysis,the monotonic loading analysis of the steel plate shear wall was carried out with the design of three parameters(opening rate,hight-thickness ratio,axial compression ratio).The load-deformation curves,the out of plane deformation graphs and the stress nephogram had been obtained before the bearing capacity performance,the deformation and stress development law of various series of components were studied.The research shows that the opening rate or the hight-thickness ratio is bigger,the structural yield load and ultimate bearing capacity are smaller,the stress value in the embedded steel plate is bigger and the structure has better ductility,while the structural yield load,ultimate bearing capacity,ductility decrease as the axial compression ratio increases;in the face of the embedded steel plate,there are positive and negative alternating strips of Qu Bo in the three parameters;in the practical engineering,the recommended opening rate is below 30% and hight-thickness ratio is between 300 and 400.(4)The cyclic loading analysis of the steel plate shear wall was carried out in the three parameters.To reveal the seismic performance of the steel plate shear wall,the comparative analysis of the hysteresis curves,skeleton curves,stiffness degradation,bearing capacity degradation,energy dissipation was carried out in the various parameters.The research shows that the opening rate,the hight-thickness ratio,the axial compression ratio are bigger,zero stiffness phenomenon is more obvious,hysteresis loops pinch more seriously;the yield displacement(ultimate displacement)has bigger improved range than the decreased range of the corresponding bearing capacity with opening;the yield load(ultimate load)has bigger improved range than the decreased range of the corresponding displacement with the embedded steel plate thickness increasing;all specimens have stable bearing capacity and good ductility in the three parameters,the brittle failure does not appear when the bearing capacity has a sudden reduction;when the specimen is finally destroyed,all specimens have the similar dissipated energy with the different opening rate,but the opening rate is bigger,the higher the efficiency of energy dissipation;the bigger the hight-thickness ratio,the more energy dissipation,but the energy dissipation efficiency becomes lower;as the axial compression ratio of the specimen increases,not only the energy dissipation but also the efficiency of energy dissipation reduces.