Cyclic Test And Mechanism Of Vertically Corrugated Steel Plate Shear Walls With Various Openings

Vertically corrugated steel plate shear wall with opening is a new type of lateral load-resisting system,which has the advantages of superior seismic performance,simple construction,convenient adjustment of structural performance,and fulfillment of architectural function.Through a combination of theoretical analysis,experimental research and finite element analysis,the seismic performance of vertically corrugated steel plate shear wall with opening was studied systematically.The main research works are listed as follow:(1)According to elasto-plastic shear buckling theory of corrugated plates,suggestions were put forward to select corrugated wall panels with a shear yielding mechanism.Based on the expected plastic mechanism,formula for the load-carrying capacity of vertically corrugated steel plate shear walls with openings on both sides was presented,and calculation method of internal forces of boundary frame members was obtained by taking free-body diagram and applying superposition principle.(2)Cyclic tests of four 1:3 scale two-story single-bay vertically corrugated steel plate shear walls with various infill panels(panel without opening,panel with bilateral gaps,panel with bilateral openings,and panel with central opening)were conducted,and the influence of opening size,opening location and end plates at the free edges on structural seismic performance were studied.The test results shown that all specimens exhibited excellent seismic performance,with high lateral stiffness and load-carrying capacity,and ductility in the range of 4.67 to 6.12.Compared with the specimen with no opening,the load-carrying capacity of the specimen with bilateral gaps,the specimen with bilateral openings and the specimen with central opening were reduced by 13%,26%,14% respectively,and the lateral stiffness were reduced by 20%,27%,33% respectively.With the same opening ratio,the lateral stiffness of the specimen with bilateral openings was 8% lower than the specimen with central opening,but with higher load-carrying capacity and ductility,because the beam-column connections in the former specimen failed earlier in the test.Welding end plates to the free edges of corrugated wall panels improved the load-carrying efficiency distinctively.(3)Finite element models of all specimens were established and cyclic analyses were conducted using ABAQUS,and the analytical results are in good agreement with the test results.Nonlinear pushover analyses of 22 finite element models of steel plate shear walls with bilateral openings were conducted,which show that vertically corrugated plates with openings had much better lateral performance than flat plates or horizontally corrugated plates with openings.The influence of axial compression ratio,existence of end plates,aspect ratio and location of infill panel on the lateral performance of vertically corrugated steel plate shear walls with bilateral openings were investigated.Finite element analysis results verified the accuracy of the load-carrying capacity formula and the method of calculating the internal forces in the boundary elements of vertically corrugated steel plate shear walls with bilateral openings presented in this paper,and design methods for structural components as well as recommendations on configurations were presented accordingly.