Experiment And Numerical Simulation Of Seismic Performance Of Inline Thin Steel Plate Composite Shear Wall

The steel plate composite shear wall is a structural form that can be partially manufactured at factory,this feature is the reason why it has been applied in assembled structural engineering in recent years.In order to reduce the common cold bridge effect of the steel plate composite shear wall,a company proposed an assembled thin steel plate composite shear wall structure.As a potential substitute of formwork for cast-in-place concrete structure,whose seismic performance and its influence factors need to be studied.This paper carried out the following studies with the help of a pseudo-static test based on the change of the two parameters,shear span ratio and the cross-section height-thickness ratio,Firstly,a total of 5 composite shear wall specimens(CSW)which size changed with parameters— shear span ratio and section height to thickness ratio,were designed for experiment.Failure mode of the structure was analyzed according to the test phenomena,contains separation between concrete and steel,partial buckle,tear of welds,and tension bolt broken.Secondly,the hysteresis curve and skeleton curve were extracted by collecting load and displacement.The research objects contained bearing capacity,strength degradation,stiffness degradation,energy consumption capacity,and strain at key points of each member,which confirmed that the wall approximately satisfies the assumption of flat section.Thirdly,specimen models were established in an accurate way corresponding to the test with the help of finite element analysis software,ABAQUS.The calculated results show that the yield strength,peak load,failure form and skeleton curves are coincide with the test,While main reason why hysteresis curve is full is that the program’s own model does not adequately simulate the closing process of concrete cracks.The phenomenon that end column bears more bending moments then followed by the steel plates on both sides and internal stiffeners could be verified in stress-strain analysis of typical components.The steel plate is mainly responsible for the shear force on the wall,and the strain and deformation of the local position of the specimens are close to the test result.Finally,axial compression ratio,shear span ratio,cross-section height-thickness ratio,steel strength,concrete strength,and steel plate thickness at part of columns were treated as variable parameters for figuring out change rule of this new type of steel plate composite shear wall based on the finite element model.In the end,The axial compression ratio should be controlled within 0.2,and increasing the thickness of the steel plate has the best effect on improving the seismic performance.