Finite Element Analysis Of Seismic Performance Of T-shaped Double Corrugated Steel Plate-concrete Composite Shear Wall

As the design height of high-rise buildings increases,the resistance level has become one of the main controlling factors in the design of high-rise buildings.Due to the high strength,good ductility and energy consumption of the double-layer steel plate-concrete composite shear wall,it is widely used in the lateral force resistance system of high-rise structures.However,the thickness of the steel plate in the double-layer steel plate-concrete composite shear wall is relatively thin,and the steel plate is prone to bulge out-of-plane when concrete is poured,which adversely affects the overall seismic performance of the structure.The double-layer corrugated steel plate-concrete composite shear wall has a greater external rigidity of the corrugated steel plate,and the corrugated steel plate increases the contact with the concrete and has a greater restraint effect on the concrete,so the double-layer steel plate-concrete composite shear wall is effectively improved of inadequacy.In order to further study the seismic performance of the double-layer corrugated steel plate-concrete composite shear wall,this paper proposes a new type of special-shaped section member——T-shaped double corrugated steel plate-concrete composite shear wall(TSCSW),the seismic performance of TSCSW is studied by numerical analysis,and the main contents are as follows:Firstly,based on the ABAQUS finite element software,the existing experiments are numerically simulated,and the experimental results are compared with the simulated results.The results show that the two skeleton curves are basically the same,and the peak load is not much different(within 10%),which verifies the correctness of the modeling method in this paper and lays the foundation for the subsequent finite element parametric analysis.Secondly,based on the modeling foundation of 1),a numerical model of T-shaped double corrugated steel plate-concrete composite shear wall foundation member(TSCSW-1)is established,and nonlinear hysteretic performance analysis is performed on it.The failure mode,hysteresis curve,bearing capacity,stiffness and energy dissipation capacity during the loading process are studied.The results show that the T-shaped double corrugated steel plate-concrete composite shear wall has good seismic performance.Finally,based on the TSCSW-1 model,the main design parameters such as concrete strength grade,steel plate strength grade,axial compression ratio,steel plate thickness,web cavity number and shear span ratio were changed,and corresponding numericalmodels were established to analyze different designs.The influence of parameters on the seismic performance of TSCSW model.The results show that the steel plate thickness and steel plate strength grade have the greatest influence on the bearing capacity of the component;the shear-span ratio has the greatest influence on the early stiffness of the component;the axial compression ratio and the shear-span ratio have the greatest influence on the energy dissipation capacity of the component.