| The corrugated steel plate is a special steel plate obtained by cold rolling of a flat thin steel plate.Its out-of-plane corrugation is similar to adding stiffeners in a certain direction of a flat steel plate,thereby improving the out-of-plane rigidity of the embedded steel plate.The early out-of-plane buckling of the steel plate is suppressed.Therefore,the corrugated steel plate shear wall structure has the advantages of high bearing capacity,large out-of-plane buckling rigidity and small deformation.And it is a new type of lateral force-resistant member.Based on the method of finite element numerical simulation,this paper first conducts a systematic study on the seismic performance of double-corrugated steel plate shear wall(D-CSPSW).The research results show that the local buckling deformation of column bottom flange and the large plastic deformation at toe of the wall are the main reasons for the failure of double-corrugated steel plate shear wall.Based on the new concept of seismic design of earthquake resilient structures,a rocking double-corrugated steel plate shear wall with replaceable dampers(RD-CSPSW)is proposed: the vertical degree of freedom of bottom is relaxed,so that the column base could move upward.And replaceable energy dampers are installed at the bottom of columns.The seismic performance under low cycle load of rocking double-corrugated steel plate shear wall is analytically investigated.The specific work is as follows:(1)Based on the finite element software ABAQUS,finite element models of the corrugated steel plate shear walls are established by using shell elements,and the existing corrugated steel plate shear wall tests are selected to verify the effectiveness of the modeling method.(2)Based on the modeling method in this paper,double-corrugated steel plate shear wall finite element models and single-corrugated steel plate shear wall finite element models were established respectively.And the difference of force mechanism and hysteretic performance of the two was contrastively analyzed.The hysteretic performance of double-corrugated steel plate shear wall is analytically investigated via a parametric study.The influence of geometric parameters on the hysteretic performance of double-corrugated steel plate shear wall structure is compared and analyzed by the hysteretic curve,skeleton curve,stiffness degradation curve,equivalent viscous damping coefficient curve,etc.The recommended ranges of geometrical parameters of the corrugated steel plate are discussed.(3)The replaceable dampers were designed,and the influence of different design parameters on the seismic performance of dampers were studied.The rocking double-corrugated steel plate shear walls with different replaceable dampers and double-corrugated steel plate shear walls were designed respectively.The seismic performance of the two was studied,and the influence of different sizes of dampers on seismic performance of RD-CSPSWs was analyzed.(4)The elastoplastic dynamic time-history analysis of rocking steel frame double-corrugated steel plate shear wall(RSFD-CSPSW)structural system with replaceable dampers and steel frame double-corrugated steel plate shear wall(SFD-CSPSW)structural system under different peak accelerations of ground motions was carried out.The base shear force,uplift displacement of columns,floor displacement and maximum story drift were analyzed.The seismic performance of RSFD-CSPSW system was comprehensively evaluated.Through the above research,it is found that double-corrugated steel plate shear wall significantly improve the mechanical behavior of corrugated-steel plate shear wall.Most of the seismic energy is dissipated through the plastic deformation of replaceable dampers of RD-CSPSW to protect shear wall from damage.And the structure function can be restored after replacing dampers.Through reasonable design,the RSFD-CSPSW structural system will have good capability of restoring the function and seismic performance. |
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