Study On Seismic Performance Of Steel Plate Shear Wall Structure With Sectional Connection Between Wallboard And Frame

In order to solve the construction and repair problems caused by too long connection between wall plate and frame,the connection form of traditional steel plate shear wall structure frame and wall panel is improved.On the basis of traditional frame and embedded steel plate is connected by bolts,the bolt standard hole on the traditional fishtail plate is replaced with the large circular hole,and the sectional angle steel with standard hole is added to form a repairable connection form between the wall plate and the frame of double fishtail plate.On the basis of making up for the construction accuracy of the shear wall of the traditional bolted steel plate,the discrete bolt group with too long connection forms a three-stage stress characteristic of "friction-standard holes pressure-large circular hole pressure",and the fishtail plate with large circular holes and section replaceable angle steel are convenient for post-earthquake repair work.The mechanical properties of this connection form are analyzed to determine its failure sequence,and then it is applied to the steel plate shear wall structure.It is hoped that each component of the steel plate shear wall can be damaged in stages or successively,so as to facilitate the post-earthquake repair work.At the same time,the seismic performance and failure mode of the steel plate shear wall structure are compared with the traditional bolted and welded steel plate shear wall structure.In this paper,the seismic behavior of steel plate shear wall and the mechanical behavior of the connection between wall plate and frame are studied by means of experiment,finite element numerical analysis and theoretical research.The main contents are as follows:(1)For the connection form,the shear test of the connector was completed.The load-displacement normalized curve of the connection under unidirectional tensile load is obtained,the bearing capacity formula corresponding to different failure states is derived,and the correctness of the formula is verified by numerical analysis.(2)The seismic performance test of a 1:3 scale single span single-layer steel plate shear wall structure with improved connection is completed,and the seismic performance and failure mode of the structure are studied.The results show that the steel plate shear wall structure with improved connection has good seismic performance.(3)The finite element software ABAQUS is used to simulate the steel plate shear wall specimen,and the results fit well.Combined with the test results,the development process of stress,strain and deformation of the specimen is analyzed,and the stress mechanism,failure mechanism of the structure and the cooperative working mechanism between the improved connecting frame and the wall panel are clarified.(4)The differences between the steel plate shear wall and the traditional bolted and welded steel plate shear wall in seismic performance and failure mode are compared.At the same time,the influence of initial defect,thickness difference of each component,bolt preload and friction coefficient on seismic performance and failure mechanism of the structure are analyzed.