Experimental Study And Numerical Analysis Of A New Double Steel Plates And Concrete Composite Shear Wall

Based on the research of steel plate shear wall and composite steel plate shear wall by scholars at home and abroad,this paper presents a new type of double steel plate-concrete composite shear wall with L-shaped connectors,and carries out experimental research and finite element numerical simulation on this new type of composite wall.The research work is summarized as follows:(1)Six specimens of double steel plate-concrete composite wall were designed and manufactured,and the experimental study was carried out under low cyclic repeated loading.The failure modes,hysteretic curves,skeleton curves,stiffness degradation,ductility and energy dissipation capacity of the specimens under low cyclic repeated loads are analyzed.The effects of different axial compression ratios and spacing of L-joints on the mechanical properties of the specimens are analyzed and compared.(2)Using ABAQUS finite element analysis software,the finite element calculation model of six double steel plate-concrete composite wall specimens was established.The results of finite element analysis are compared with the experimental results.The accuracy of the finite element analysis model is verified by comparing the skeleton curve with the key indexes.The whole nonlinear stress analysis of the double steel plate-concrete composite shear wall is carried out.(3)Based on the accuracy of the finite element model,the influence of steel strength,concrete strength,end-to-column ratio,shear-span ratio,steel plate thickness,core concrete,steel tube wall thickness and connection type on the seismic performance of double steel-concrete composite shear wall is studied by using the established finite element model.(4)Based on the accuracy of the finite element model,the influence of steel strength,concrete strength,end-column ratio,shear-span ratio,steel plate thickness,core concrete,steel tube wall thickness and connection type on the shear performance of double steel-concrete composite shear wall is studied by using the established finite element model.