Research On Seismic Performance Of Multi-span Coupled Non-stiffened Thin Steel Plate Shear Wall

This paper aims to study a multi-span coupled non-stiffened thin steel plate shear wall structure composed of steel coupling beams and multiple non-stiffened thin steel plate shear walls.The structure can make full use of the stable hysteretic energy dissipation capacity of the steel coupling beam and the steel plate shear wall,so that the overall structure remains elastic under the action of small earthquakes,and the steel coupling beam and the wall limbs successively enter the plasticity under the action of moderate earthquakes and large earthquakes.In addition,the structure can make the steel plate shear wall layout more flexible and convenient,which is conducive to enhancing the overall bending capacity and rigidity of the steel plate wall structure,and even constitutes a steel core tube structure system with better side resistance.In this paper,the finite element software ABAQUS is used to simulate the whole process of the seismic performance test of Chao-Hsien's coupled steel plate shear wall.Comparison with the existing test load-displacement curve data verifies the correctness and rationality of this modeling method.Secondly,the coupled steel plate shear wall in the actual project is used as a prototype to select the coupled link beam height As the variable parameters,the thickness of the steel plate filled in the wall limbs and the number of spans of the wall limbs are used as variable parameters to study the influence of different parameters on the coupling ratio of the multi-span coupled steel plate shear wall.The results show that the coupling ratio of the multi-span coupled steel plate shear wall is proportional to the height of the coupled beam,proportional to the number ofspans of the wall,and inversely proportional to the thickness of the steel plate in the wall.In addition,this paper also conducts a quasi-static hysteretic performance study on multi-span coupled steel plate shear wall models with different coupling ratios,and analyzes the coupling ratio on its structural bearing capacity,hysteresis curve,skeleton curve,ductility,energy consumption The impact of seismic performance such as capacity,equivalent viscous damping and stiffness degradation.The results show that the steel coupling beams of the multi-span coupled steel plate shear wall can better participate in the overall energy dissipation of the structure,and the coupling ratios of the double-span and three-span coupled steel plate shear wall are within the range of0.45 ~ 0.70 and 0.50 ~ 0.75,respectively.The overall bearing capacity of the structure increases the most,and the seismic performance and economic benefits are better.Finally,by analyzing the axial force of the side wall leg column of the multi-span coupled steel plate shear wall,combined with the structural coupling ratio,the side column axial force ratio-coupling ratio curve is found,and it can be found that multi-span coupled non-stiffened thin steel plate shear wall can be designed by controlling the side wall leg column axial force ratio.