Research On Lateral Performance And Seismic Behavior Of Asymmetric Cross-stiffened Corrugated Steel Shear Wall

As a new type of lateral system,corrugated steel plate shear wall can effectively alleviate the problem of “buckling occurs when forces are exerted” of the traditional flat steel plate shear wall,and significantly improve the energy dissipation capacity,bearing capacity and ductility of the structure.However,as the main lateral resistance and energy dissipation member of high-rise building structure,the embedded panels of corrugated steel shear wall will occur inelastic buckling in the later stage of loading,resulting in unloading of the embedded panels.It will lead to serious degradation of the bearing capacity and stiffness of the whole structure.In order to solve this problem,the asymmetric cross-stiffened corrugated steel shear wall is proposed in this article.The mechanical behavior of the structure is studied by using the finite element analysis method.The main research works and results are listed as follow:(1)By using the finite element software ABAQUS,the experiment of corrugated steel shear walls connected on both sides.By comparing the hysteresis curve,skeleton curve,stiffness degradation curve and damage mechanism between the finite element model and the test specimen,the accuracy and reliability of the finite element simulation and analysis of corrugated steel plate shear wall are verified.(2)The lateral performance of asymmetric cross-stiffened corrugated steel shear wall under monotonic loading is studied,mainly including the elastic buckling performance of the embedded wall panels and the nonlinear pushover performance of the stiffened shear wall structure(including the outer frame).On the basis of the finite element study,the shear bearing capacity formula of the asymmetric cross-stiffened corrugated steel shear wall is proposed and its accuracy is verified.The result show,the critical buckling load of corrugated steel plate can be improved by asymmetric cross-stiffening ribs.The elastic buckling properties of wall are greatly influenced by parameters such as panel thickness and wavelength.Asymmetric cross-stiffening ribs can effectively suppress the inelastic buckling of corrugated steel plates in the middle and late stages,which has a better improvement on the initial stiffness,bearing capacity and ductility of corrugated steel plate shear wall,and the improvement effect is more significant than that of cross-stiffening ribs.(3)The hysteretic behavior of asymmetric cross-stiffened corrugated steel shear walls under cyclic load is studied.The result show,the energy dissipation capacity,bearing capacity and ductility of corrugated steel shear walls under repeated loads are improved by the asymmetric cross-stiffening ribs,and the stiffness degradation is delayed,and the out-of-plane deformation is reduced.The improvement of the hysteretic performance of corrugated steel shear walls is obviously better than that of the cross-stiffening ribs.(4)The influences of five parameters on the hysteretic behavior of the asymmetric cross-stiffened corrugated steel shear wall are investigated.The five parameters include corrugated plate layout direction,corrugated plate thickness,wave length,wave height and stiffener width.A total of 22 finite element models in 5 different series were built,and four comparative analyses were conducted in terms of hysteresis curve,energy dissipation capacity,skeleton curve,stiffness and strength degradation curve.Based on the analysis results,a reasonable range of values for each parameter is given,which can provide reference for practical engineering.