Research On Seismic Performance Analysis And Design Method Of Partially Connected Buckling Restrained Steel Plate Shear Walls

Steel plate shear wall is a new type of aseismic component,which is gradually used as one of the main anti-lateral force components of high-rise buildings because of its excellent performance of good bearing capacity,plastic capacity and stable energy dissipation capacity.The additional bending moment caused by the embedded steel plate in the traditional four-sided steel plate shear wall has a great effect on the frame column,which is easy to cause the bending instability of the frame column.In view of the traditional steel plate shear wall is easy to be affected by external factors,such as the premature buckling deformation of the embedded steel plate,the easy damage of the constraint members,and the tedious installation and maintenance,all these hinder its development.Therefore,a new type of partially connected buckling restrained steel plate shear wall is developed to enhance its seismic performance and energy dissipation capacity,so that it can be quickly and effectively restored after an earthquake simply by replacing the embedded steel plate.Combining theoretical analysis with numerical simulation,the mechanical mechanism and hysteretic properties of partially connected steel plate shear walls are emphatically discussed,and a simplified analysis method suitable for structural system is proposed.The main work completed in this thesis includes the following aspects:(1)The proposal of partially connected steel plate shear walls with buckling constraintsThises summarizes and analyzes the mechanical performance and structural characteristics of various types of steel plate shear walls in common use,improves the existing problems in the previous structures,and combines the stability theory of plates with the idea of slippable lateral constraint to put forward a partially connected buckling restrained steel plate shear wall,and explains its structural characteristics.(2)Feasibility verification of partially connected buckling constraint steel plate shear wallsIn order to verify the feasibility of the research,the model is modeled and compared with some common steel plate shear walls by numerical simulation.The finite element displacement nebulae of a typical example is compared to illustrate the function of a restrained member with a partially connected buckling restrained steel plate shear wall.(3)Analysis of hysteretic performance data of partially connected steel plate shear walls with buckling constraintsBased on the influence analysis of parameters such as height-thickness ratio,height-width ratio and partial connection ratio,the changes of hysteretic curve,energy dissipation capacity,initial stiffness and peak bearing capacity of partially connected flexural steel plate shear walls under reciprocating load are investigated,and the design suggestions are given.(4)Study on the design method and simplified model of partially connected buckling restrained steel plate shear wallThe minimum moment of inertia of the restrained members and the design method of the section of the restrained members are proposed based on the requirement of the moment of inertia of the edge restrained members and the construction of the partially connected buckling restrained steel plate shear wall.According to the structure of the four-sided connection and the theory of "equivalent tension and compression rod model",the lateral bearing capacity of the partially connected flexion restrained steel plate shear wall is derived and verified by comparing the lateral bearing capacity of the equivalent generation model with the finite element model data.The results above show that the partially connected flexion restrained steel plate shear wall proposed in this paper is an excellent anti-lateral member.The influence of high aspect ratio on energy consumption is low,and the structure can be used in the area with low seismic fortification intensity.The partial connection ratio has little effect on the structure,and the structure can be flexibly arranged in engineering application by adjusting the connection mode.The design method of partially connected flexion restrained steel plate shear wall is reasonable and applicable.The partially connected flexion restrained steel plate shear wall designed according to this method has excellent anti-lateral hysteresis performance.