Experimental And Numerical Study On The Self-centering SRC Two-limb Rocking Wall

Earthquakes are often acco MPanied by the damage and collapse of buildings,which can cause huge loss of human life and property.Therefore,seismic design of buildings is particularly important.At first,the seismic design of the building was mainly anti-collapse design,and the pursuit of controlling the "maximum deformation" of the building structure during the earthquake.Although the buildings with the anti-collapse design showed good seismic performance in several large earthquakes,some Excessive residual deformation of the building after the earthquake makes repairs costly and even affects the continued use of the building.Therefore,the seismic design has changed from an anti-collapse design to a repairable design.Under this background,this paper proposes a SRC double-limbed swing wall panel structure system with self-resetting function.The steel frame is connected to the double-limbed concrete swing wall panel by prestressed steel bars,and then it is set in an appropriate position of the double-limbed swing wall panel.The replaceable energy dissipating device,this not only effectively improves the energy dissipation capacity of the building,but also ensures a small residual deformation after the earthquake,so that the structure will not be damaged during the earthquake,and only need to replace the energy dissipation device after the earthquake to restore the structure to function,thereby reducing Maintenance costs.In this paper,based on the low-cycle repeated loading test study of self-resetting SRC double-limb swing wall panels,and using ABAQUS finite element software to perform finite element simulation of self-resetting SRC double-limb swing wall panels,through the co MParison of test and simulation results,Determine the final model,and then through variable parameter analysis to summarize the i MPact of various structural parameters on the seismic performance of the structure,the specific research content is as follows:(1)Analyze and summarize the hysteretic curve,skeleton curve,initial stiffness,bearing capacity,equivalent viscous damping coefficient,and stiffness degradation of the structure by performing low-cycle repeated loading tests on the self-resetting SRC two-limbed swing wall panel.The overall analysis of the self-resetting SRC double-limb swing wall panel structure provides a reliable basis;(2)A finite element model of a self-resetting SRC double-limbed rocking wall plate is established,and the load-displacement curve,skeleton curve,specimen deformation and failure modes of the structure under test and simulation are co MPared,and the seismic performance of the structure is further analyzed.And reliability.(3)Through the finite element variable parameter analysis,the effects of pre-stressed steel bars,energy dissipators,and the two-sided swing wall itself on the self-resetting performance,energy dissipation capacity,stiffness,and bearing capacity of the self-resetting SRC double-limb swing wall panel are studied.