Study On The Lateral Force Resistance Of Steel Plate Shear Wall Connected To Both Sides

As a new type of lateral force-resistant member,steel plate shear wall has the advantages of high strength,good ductility,and light weight compared with concrete shear wall,and has received extensive attention in the field of building structures.The steel plate shear wall connected on both sides can easily change the length and width,adjust the bearing capacity and rigidity of the steel plate shear wall,and facilitate the arrangement of doors,windows and pipes,and has a wide range of application prospects.However,the current research is mainly focused on the steel plate shear wall connected on both sides with an aspect ratio of not less than 1.0.There is still a lack of experimental research on specimens with an aspect ratio of less than 1.0.The simplified calculation model has only passed a few specimens with an aspect ratio of 1.0.Verification of the test results,the calculation results of simplified models at home and abroad are quite different.Therefore,the in-depth study of the lateral force resistance performance of the steel plate shear wall connected on both sides has important theoretical and engineering significance.In this paper,with the steel plate height-to-thickness ratio and aspect ratio as parameters,6 specimens of thin steel plate shear wall connected on both sides are designed,and horizontal low-cycle repeated load tests are performed on them to study the hysteretic performance,skeleton curve,bearing capacity,Side force resistance performance such as energy consumption and stiffness degradation.And through experiments to verify the finite element model for parameter simulation analysis.The experimental results show that the thin steel plate wall with two sides has good ductility,and the displacement ductility coefficient is greater than 5.With the decrease of the aspect ratio and the aspect ratio,the hysteresis curve pinching effect was improved,and the lateral stiffness and bearing capacity were increased obviously.The displacement Angle of each specimen at yield was between 1/200 and 1/160,and the ultimate displacement Angle was greater than 1/50.The aspect ratio and the aspect ratio had little influence on the yield displacement angle.A finite element model of the steel plate shear wall connected on both sides was established to carry out numerical analysis of each specimen,compared with the test results,to verify the rationality of the calculation model,and to analyze its stress and deformation.The analysis results are in good agreement with the test results.And on this basis,the bearing capacity of 35 thin steel plate shear walls connected on both sides with aspect ratio and height-to-thickness ratio as parameters was simulated and analyzed,and the bearing capacity obtained by different simplified calculation models was compared and analyzed.When the aspect ratio is greater than 1,the bearing capacity of the equivalent cross bar model is more accurate;when the aspect ratio is less than 1,the tension-compression bar model can calculate the shear bearing capacity more accurately.For the stiffness calculation,it is recommended to use the equivalent cross-bar model for more accurate calculation.When the amount of steel used is the same,the steel plate shear wall with smaller height and width and larger height and thickness should be adopted in the design of the steel plate shear wall connected on both sides,which will bring better economic benefits.