Study On Seismic Performance Of Double Steel Plate-concrete Composite Shear Wall Square Cylinder

Because of its excellent seismic performance,more and more domestic scholars have carried out experimental research on the composite shear wall,and there are more and more outsourcing steel plate concrete composite structures are used in the construction.The tube structure is also widely used for its excellent seismic performance.Considering that the tube structure enclosed by elevator,stairwell or washroom in the central area of the building is the main lateral force resistant structure of the building,in this paper,the double steel plate concrete composite shear wall is enclosed into the tube structure,forming the double steel plate concrete composite shear wall tube and using ABAQUS to analyze its seismic performance.Considering the fact that it is necessary to open an opening in the wall of the double steel plate concrete composite shear wall in order to facilitate the use of the inner space of the wall,ABAQUS is used to analyze the seismic performance of the double steel plate concrete composite shear wall under the condition of opening.Around the above two points,the following three aspects will be carried out in this paper:(1)To verify the accuracy of ABAQUS in simulating the seismic performance of double steel plate concrete composite shear wall,the existing tests are simulated and the bearing capacity,deformation and failure mode are compared,the results are within the acceptable error range,so it is feasible to use ABAQUS to simulate the tube structure surrounded by double steel plate concrete composite shear wall.(2)The foundation analysis model of double steel plate concrete composite shear wall is established,and different series of analysis models are established according to the parameter changes of steel plate thickness,material strength,axial compression ratio and shear span ratio of the foundation analysis model.The influence of different parameters on the seismic performance of composite shear wall cylinder is studied.The results show that: the thickness of steel plate and the shear span ratio have a significant impact on the initial stiffness and cumulative energy consumption capacity of composite shear wall;the material strength and axial compression ratio have a greater impact on the bearing capacity and deformation capacity of composite shear wall;the steel strength and shear span ratio have a greater impact on the ductility of composite shear wall.(3)The model of double steel plate concrete composite shear wall with opening is established,and the change of seismic performance of composite shear wall is analyzedaccording to the change of wall(abdominal wall or wing wall),the size of opening and the position of opening(height from the bottom of abdominal wall).The analysis results show that the opening will weaken the initial stiffness of the composite shear wall cylinder,the degree of weakening is proportional to the size of the opening;the opening in the wing wall is not conducive to the overall stability of the composite shear wall cylinder;the opening will reduce the bearing capacity of the composite shear wall cylinder,but it will improve the deformation capacity and ductility,and improve its energy consumption capacity.