| Through post-earthquake research on a large number of buildings,it is found that the traditional frame shear wall structure has the problem of excessive shearing force at the bottom.Under the action of earthquake,the bottom of the wall is easily damaged due to excessive shearing force,and the overall energy consumption capacity of the structure is insufficient.Brittle shear between the shear beam and the shear wall is prone to brittle shear damage.Under this background,this paper proposes a double energy-consuming frame rocking wall structure with self-resetting ability,which effectively reduces the dynamic response of the structure under earthquake action,and the residual displacement of the structure after the earthquake is effectively controlled.In this paper,the static analysis of the structure is carried out by theoretical analysis and formula derivation.The nonlinear dynamic time history analysis of the structure is carried out by means of ABAQUS finite element software.The seismic performance of the structure is studied.The general conclusion proves that the structure is more traditional than the traditional one.The seismic performance advantages of the frame shear wall structure,and the influence of various influencing factors on the seismic performance of the structure are summarized by analyzing the variable parameters of each influencing factor.The specific research contents and results are as follows:(1)The self-reset condition of the new structure is given by static analysis and formula derivation.The basic equations of the structure are derived,and the analytical expressions of the internal forces and displacements of the structural system are given by using the basic equations.The effect of metal damper and prestressed steel strand on the horizontal displacement and shear force requirements of the structure under static force.(2)Based on a typical frame shear wall structure in this area,finite element analysis of frame shear wall structure,double energy dissipation frame rocking wall structure and double energy dissipation frame rocking wall structure with self-resetting ability is established by using ABAQUS.The model selected six seismic waves for nonlinear dynamic time history analysis and comparison of the three structures.The results show that the double-energy frame rocking wall structure with self-resetting ability can effectively reduce the seismic response of the structure,and significantly improve the excessive shear demand of the traditional frame shear wall structure.The peak acceleration of the floor is reduced at the most.51%,and the residual displacement after the earthquake is effectively controlled.The prestressed steel strands in the rocking wall can further reduce the seismic response of the frame,which is basically consistent with the static analysis results.(3)The variable parameters of the metal damper,lateral buckling restraint support and self-reset device of the double-energy frame rocking wall structure with self-resetting capability are analyzed,including the stiffness of the metal damper.The buckling constraint support stiffness and the initial prestress of the steel strand were analyzed by variable parameters,and the influence of the parameters of the three major factors on the seismic performance of the new structure was summarized.The results show that the new structure has the lowest seismic response when the metal damper stiffness is C11×10~9·m/rad,the buckling constraint support yield strength is 0.61)and the prestress is 50%of the ultimate strength.(4)The influence of the arrangement position,cross-sectional area and pre-stress of the prestressed steel strand on the overall seismic performance of the new structure is analyzed.The variation of the parameters on the bottom damper angle,the stress variation of the steel strand and the residual of the rocking wall are summarized.The effect of displacement size. |
