Shaking Table Test And Simulation Analysis Of High-rise Steel Frame-steel Plate Shear Wall Structure

The steel frame-steel plate shear wall structural system has been widely used in various buildings and structures,and there are corresponding research results on the design methods,force mechanism and damage modes of different forms of steel plate shear walls,but the overall research on the steel plate shear wall structure is less.The research on the overall seismic performance of steel plate shear wall structure is of great engineering value for the promotion and application of this structural form.The main research of this paper is as follows:（1）Prototype structural seismic design of a ten-story steel frame-steel plate shear wall structure with reference to a building scheme of a high-rise structure in Lanzhou,Gansu.Subsequently,a 1/8 scale model was designed based on the parameters of the prototype structure and shaking table using the method of dimensional analysis and the principle of stiffness equivalence,and two equivalent models of central support and I-shaped openings were designed to address the problem that the thickness of the actual steel plate shear wall was too thin and easy to weld through,etc.The ABAQUS comparison of the two models revealed that the latter had better equivalence in terms of seismic performance,and the latter was finally selected as the model for the steel plate shear wall used in the test.（2）The seismic performance of the scaled-down model was investigated by shaking table test,which showed that: the steel frame-steel plate shear wall structure showed bending type deformation characteristics,with the increase of the peak seismic input,the acceleration of each floor of the structure became larger and smaller acceleration amplification coefficient;the stress on the bottom and second floor steel plate shear wall under the earthquake was larger,and the stress on the higher floor steel plate shear wall was smaller.The plastic hinge of the frame mainly appears at the end of the beam near the steel plate shear wall and the end of the column at the ground floor,as the first line of defense of the whole structure,the steel plate shear wall makes the frame get some protection in the earthquake action,which ensures the structure has good seismic performance.（3）SAP2000 was used to establish an open-hole finite element equivalent model of the experimental model,and the analysis and comparison with the experimental results verified the feasibility of finite element modeling;a scaled-down model of the prototype structure without open holes was established and compared with the open-hole finite element equivalent model,and the results showed that this open-hole steel plate shear wall can well replace the original open-hole steel plate shear wall and reflect the overall characteristics of the prototype structure;the seismic performance of the steel plate shear wall structure with different thicknesses was analyzed.The analysis of the seismic performance of the shear wall structure with different thicknesses of steel plates shows that: regardless of the thickness of the steel plate wall,most of the plastic hinges of the structure appear on the beam,and the column hinges are only at the bottom of the border column of the first layer of the steel plate shear wall;increasing the thickness of the steel plate shear wall can increase the self-oscillation frequency of the structure and improve the overall structural stiffness,and within a certain range,the greater the thickness,the smaller the structural displacement and acceleration response under the earthquake,and reduce the structural damage.In a certain range,the greater the thickness,the smaller the structural displacement and acceleration response under seismic action,reducing the structural damage,but continue to increase the thickness of the steel plate shear wall structural response but greater.