Mechanical Performance Parameter Analysis And Design Method Study Of Embedded Steel Plate Reinforced High-Strength Concrete Combined Shear Walls

The shear wall as an important anti-lateral force component for rapid developing high-rise buildings and super high-rise buildings,is put higher demands on its mechanical performance.In order to meet the dual requirements of safety and economy,the research and application of combined shear walls has received more and more attention from the industry.In this paper,the mechanical performance and design method of Embedded Steel Plate Reinforced High-strength Concrete Combined Shear Walls(ESPRHCCSW)with advantages of steel structure and concrete structure is studied.The research work and results mainly includes:(1)According to the experimental study of team,the ESPRHCCSW is analyzed by using ABAQUS finite element software,the rationality of the model and the reliability of the finite element analysis results were verified by comparing the the hysteretic curves,skeleton curves,ductility and broken shapes of analysis results with the test results.(2)Through finite element simulation,analysing the impact of parameters such as axial compression ratio,end column embedded steel ratio,thickness ratio of steel plate to wall,end column longitudinal reinforcement ratio and wall distribution reinforcement ratio on seismic behavior of ESPRHCCSW.By analyzing the changes of bearing capacity and ductility,lateral stiffness and energy dissipation capacity of composite wall specimens under different parameters,the suggested range of each parameter in the application of ESPRHCCSW is put forward.(3)Based on the analysis of shear capacity of ESPRHCCSW,on the premise that it is quite different from the structure of composite wall involved in the current code and its calculation formula is not applicable.On the basis of the formula of shear capacity of steel plate concrete composite shear wall in the code,the shear capacity formula of ESPRHCCSW is proposed by correcting the coefficient of the items and considering the contribution of the longitudinal reinforcement of the end column to the shear capacity of the composite wall.The formula is checked to the finite element simulation and test of literature in this paper.(4)The deformation performance index of ESPRHCCSW is studied.Based on the method of skeleton curve-based division,dividing the force performance state of the composite wall specimens,and selecting the displacement angle as the performance limit index.According to the results of finite element analysis,the influences of the parameters such as axial compression ratio,end column embedded steel ratio,thickness ratio of steel plate to wall,end column longitudinal reinforcement ratio and wall distribution reinforcement ratio on the deformation performance limit index are analyzed.Based on the influence of various parameters on the deformation performance index limits of ESPRHCCSW,the formula for calculating the dispalcement limit value of deformation performance index is proposed.The formula is applied to the finite element simulation specimens in this paper for verification,which provides a reference for subsequent study of the deformation performance index limit of composite shear wall.