Research On The Seismic Performance Of Steel Frame Structures With Buckling-resistant Steel Plate Shear Walls

Due to the suddenness and unpredictability of earthquake disaster outbreak,it often brings great damage to human society,therefore,improving the seismic performance of buildings will effectively reduce the loss of life and property.Anti-buckling steel plate shear wall is a new type of lateral force components,which is embedded with steel plate and covered with concrete slab.Compared with traditional steel plate shear walls,anti-buckling steel plate shear walls are less prone to buckling under stress,have higher initial stiffness and better energy dissipation capacity,and can limit the buckling deformation of steel plate through its concrete cover plate components.However,the research on buckling steel plate shear wall mainly focuses on the aspects of component form,mechanical performance and theoretical research.Different from the past,this paper will analyze and study the integral performance of buckling steel plate shear wall steel frame structure from a more macro perspective.In this paper,the finite element analysis software SAP2000 is used for modeling and analysis,and a five-story steel frame in a high intensity region is selected as the basis for the study,and the effects of height-thickness ratio and building height on the seismic performance of flexural steel plate shear wall steel frame structure are analyzed,and the main research elements and results are as follows.(1)In this paper,SAP2000 and PKPM are used to model and analyze the original structure respectively,and the period,vibration type,mass and base shear calculated by both software are within reasonable range,which verifies the correctness of SAP2000 modeling.(2)The steel frame structure of anti-buckling steel plate shear wall with height-tothickness ratios of 200,350 and 500 was selected for modal analysis,dynamic time course analysis and static Pushover analysis with the original structure.The results show that,compared with the original structure,the structure with anti-buckling steel plate shear wall can effectively increase the structural stiffness and reduce the inter-story displacement angle,vertex displacement and floor velocity;however,as the thickness of the built-in steel plate increases,it will cause the maximum value of the inter-story displacement angle of the structure to move downward,which is not conducive to the seismic resistance of the structure.The structure as a whole does not enter the elasto-plastic state under multiple earthquakes,and the difference in seismic performance of the anti-buckling steel plate shear walls with different height-tothickness ratios is not significant.In rare earthquakes,comparing three different thicknesses of anti-buckling steel plate shear walls,the thinner the steel plate,the earlier the steel plate enters the plastic phase under the earthquake,the more energy is consumed;the thicker the steel plate,the greater the stiffness of the anti-buckling steel plate shear wall,which should not yield and cannot be fully utilized.(3)On the basis of the original building structure,establishing five,eight,and twelve stories steel frame structures uses buckling steel plate shear walls of a height-to-thickness ratio of 600.The purpose is to study the influence of building height on the anti-buckling steel plate shear wall.Through modal analysis and time history analysis,it is found that the anti-buckling steel plate shear wall can significantly improve the seismic performance and ultimate bearing capacity of the structure;and the percentage of energy consumed by the hysteresis of antibuckling shear walls increased gradually with the increase of building height,which improved the structure more and more obviously.