Study On Seismic Behavior Of Z-Shaped Double Steel Plate-Concrete Composite Shear Wall

With the continuous development of super high-rise buildings,the structure often has to bear large vertical loads and horizontal earthquakes.If traditional reinforced concrete shear walls are used,they are self-contained,poor seismic performance,and the walls are too thick and wet.There are many disadvantages such as too many jobs and complicated processes.Therefore,the development of a shear wall with high bearing capacity,good seismic performance,strong energy consumption and convenient construction is an effective method to solve this problem.In this paper,a new type of Z-shaped double steel-concrete composite shear wall is proposed,and its seismic performance is analyzed by theoretical analysis.The following aspects are studied:(1)Based on the previous literature research data,this paper designs the corresponding one-shaped and T-shaped double steel plate-concrete composite shear wall member model based on the existing experimental research using ABAQUS finite element analysis software.The seismic behavior of the combined shear wall under the action of horizontal low-cycle reciprocating load is compared and analyzed by finite element simulation results and experimental results.The results show that the hysteresis curve and skeleton curve obtained by the finite element software agree well with the hysteresis curve and the skeleton curve of the test,and the stiffness degradation and the variation of the bearing capacity are consistent.The error between the peak load value and the experimental value calculated by the finite element is within 10%,and the error of the finite element stiffness degradation coefficient,the bearing capacity degradation coefficient and the test result is within 2%.Thus,the correctness and reliability of the finite element modeling method are verified.(2)Using the finite element analysis software to establish the basic(Base)component model,the hysteresis curve,skeleton curve,bearing capacity degradation,stiffness degradation and other curves of the component are obtained to analyze the seismic performance of the component and according to the component skeleton.The feature points on the curve analyze the force characteristics of the member.(3)The finite element model of seven series of 30 Z-shaped double steel plate-concrete shear walls under horizontal low-cycle reciprocating load was established to study thickness of wall,concrete strength grade,steel plate strength grade,steel plate thickness,axial compression ratio,shear span ratio and web and flange stiffness ratio on the seismic performance of Z-shaped double steel-concrete composite shear wall bearing capacity,energy dissipation capacity and stiffness degradation ability.The results show that the Z-shaped double steel plate-concrete shear wall has good bearing capacity,ductility and energy consumption,and it is a good new seismic performance component.(4)Analysis of the seismic behavior of Z-shaped,L-shaped and T-shaped double steel-concrete composite shear walls are compared.(5)The seismic design of Z-shaped double steel plate-concrete composite shear wall are proposed in this paper.