Reaearch On Hysteresis Performance Of Composited Shear Wall Filled By Concrete Between Double Steel Plates

In this paper,composited shear wall which has concrete been filled between double steel plates and steel link beam were used in the normal concrete coupled shear wall to overcome the shortcoimg of aseismatic performance and ductility,which called composited coupled shear wall.At present,the research on the bearing capacity and seismic performance coupled shear wall which has concrete been filled inside does’ t have enough depth,especially the parameter study.In summary,in order to study the seismic performance of the composited shear wall,ABAQUS;the finite element analysis software;was used in this paper to research ability and performance of the structure.The research mainly includes the following aspects:(1)A seven-span,twelve-story,residential and commercial building with compoisted coupling shear wall with concrete filled between two steel plates was designed by the software SAP2000,and a three-layers speciment of the middle span at the structure’s bottom was taken out as the object of the analysis.(2)The finite element model of composited coupled shear wall with concrete filled between two steel plates was established in ABAQUS.A existing experiment was selected to compared with the result of simulation.Through the contrast,the feature of hysteretic curves and skeleton curves of the test and simulation were similar.As a result,the method of establishing model is reliability.(3)Eleven specimens of composited shear wall with concrete filled between two steel plates were established.Finite element analysis by ABAQUS was used to analysis these specimens’ seismic ability and the single-track horizontal load and low-cycle horizontal load werer inflicted on the specimens during the simulation.The analysis results shows that,the axial load ratio is an important parameter which affects the bearing capacity of the structure.With the increase of the axial compression ratio,the bearing capacity and seismic performance of the specimen first increase and then decrease.The much more lager axial compression ratio will lead to destruction of the specimen at a very early time of the whole process.And the recommended range of the axial compression ratio is 0.4-0.6.(4)Nine specimens of composited shear wall with concrete filled between two steel plates was establish.The primary parameters;which were the length of coupling beams,the thickness of the steel plates and the height-width ratio of the shear wall;were analyzed to study the hysteresis performance of the structure.The results showed that: The increase of the thickness of the steel plate can significantly reduce bottom’s out-of-plane displacement.The length of the coupling beam and the aspect ratio of the pier directly affect the stiffness ratio of the wall and the coupling beam,and the stiffness ratio of the wall-limb coupling beam of composite shear wall has a significant impact on the failure mode,bearing capacity and energy dissipation capacity of the structure.Based on the previous work,the stiffness ratios of the previous nine specimens were be calculated.Through comparative analysis,it can be found that when the structure’s igidity ratio is between 4 and 5,the shear wall has ideal failure mode;excellent bearing capacity and energy dissipation capacity.