Performance Of Steel Plate Shear Wall Considering The Vertical Load From Adjacent Columns

As a new type of high effective lateral force resistance system,steel plate shear wall has many advantages,such as high lateral stiffness,high energy dissipation capacity and fast construction speed.Due to its structural characteristics of buckling before yielding and forming "tension zone" after buckling to continue to bear the horizontal load,thin steel plate shear wall has been favored by many excellent scholars at home and abroad,and a lot of research work has been carried out based on this stress characteristic,providing valuable experience for the comprehensive promotion of steel plate shear wall.At present,there is no research on the effect of vertical load on the performance of steel plate shear wall at home and abroad,and it is often assumed that the embedded steel plate does not bear vertical load in the design,which is inconsistent with the reality.In practical engineering,steel plate shear wall inevitably bears vertical load due to processing sequence and steel creep,etc.The existing design specifications and standards of steel plate shear wall do not consider the impact of vertical load,overestimating the mechanical performance of steel plate shear wall,which will bring potential risks to engineering application.Therefore,in this paper,theoretical analysis,experimental analysis and finite element analysis are combined to conduct a comprehensive and in-depth study on the mechanical properties of steel plate shear wall under vertical load.The main contents are as follows:1)The research results of steel plate shear wall at home and abroad were comprehensively summarized.Combined with relevant design codes at home and abroad and the characteristics of steel plate shear wall,the distribution of compressive stress of embedded steel plate in steel plate shear wall and the stress state of embedded steel plate under the action of shear stress were theoretically analyzed.The concept of effective width is used to divide the steel plate shear wall into three regions.Considering the post-buckling strength of steel plate shear wall,a simplified formula for vertical load of embedded steel plate under gravity load is derived.2)Four groups of 1:4 scale low-cycle reciprocating tests of non-stiffened steel plate shear walls with vertical loads were completed.The effects of vertical loads on failure modes,skeleton curves,hysteretic curves and vertical stress distribution of embedded steel plates were compared and analyzed.The shortcomings in the design and test process were described,which could provide some reference for subsequent related tests.3)Shell163 element fine model is established by using large nonlinear software ANSYS-LSDYNA.Comparing the finite element analysis results with the test results,the difference between the ultimate bearing capacity of SPSW1 is less than 15%,and the difference between SPSW2 is less than 8%,which is within the acceptable range,proving the feasibility and accuracy of the established finite element model.4)Using ANSYS-LSDYNA software set up three kinds of steel plate shear wall(typical steel plate shear wall,reinforcement steel plate shear walls,open hole steel plate shear wall)simplified finite element model,a comprehensive study of different vertical load,high thickness ratio,across comparing three kinds of steel plate shear wall elastic shear capacity,ultimate bearing capacity,embedded steel plates for vertical load and stress distributions of embedded steel plate.