Study On Seismic Behavior Of Energy Dissipation Shear Wall With Concrete Filled Steel Tube Columns Element

To develop a more superior and efficient anti-seismic performance system for high-rise building structure resistance,then put forward the energy-conserving shear wall of concrete-filled steel tubular columns.The new shear wall utilizes the ductility advantages of the concrete-filled steel tube columns,and has excellent seismic performance by setting the energy-consuming keys of the steel plates and the rubber energy-absorbing belt to enhance the seismic energy-dissipation capability of the wall.In this experiment,a test specimen of energy-conserving shear wall of a concrete-filled steel tubular column element and an ordinary shear wall specimen were designed and manufactured,and a low-cycle reciprocating load test was conducted.According to the test results,the seismic characteristics such as failure characteristics,bearing capacity,ductility,stiffness degradation process,energy dissipation capacity,hysteresis characteristics,etc.were analyzed.The calculation model of the bearing capacity of the new type shear wall specimen was established and a comprehensive evaluation of the performance price ratio was carried out.The results of the study show that,compared with ordinary shear wall specimens,the evaluation of cost-effective shear wall specimens of concrete-filled steel tubular columns is good,the seismic energy-consuming capacity and bearing capacity are both significantly improved,with high safety reserves,slow degradation of stiffness,and better post-deformation capability.The calculation results of the established bearing capacity model are in good agreement with the test results,which can provide a theoretical basis for the seismic design of this type of shear wall.Based on the experimental study,the nonlinear finite element analysis of energy-conserving shear wall of concrete-filled steel tubular column element is performed by ABAQUS finite element software.The simulation results are in good agreement with the experimental results.The rationality of the constructed finite element model was verified.Then,the influence of the position change of the energy dissipation key on the seismic performance of the new shear wall plate was studied.A total of two models have been designed.One is a shear wall model(△W)in which the energy consumption key of the steel plate is arranged in “△” shape,and the other is a shear wall model(XW)in which the energy consumption key of the steel plate is arranged in “X” shape.The ABAQUS simulation analysis was conducted and compared with the shear wall model(PW)that uniformly disposes the energy dissipation key of the steel plate.The results show that in the three shear wall models,the shear wall(XW)with the energy disposition key of “X”-shaped steel plate is much better than the other two models in terms of bearing capacity and ductility.Among the three models,XW has the slowest rate of stiffness degradation,the highest safety reserve,and the more even stress distribution on the wall,It is more conducive to give full play to the role of steel energy-consuming keys...