Nonlinear Simulation Analysis Of Lateral Stiffness Of RC Frame-Core Wall Structures Considering Performance Targets And Stiffness Eigenvalues

RC frame-core wall structure has double lateral resistance,and the phenomenon of floor stiffness degradation and shear redistribution exists objectively in the frame-core wall structure.With different seismic performance targets and stiffness characteristic values,the deformation of the frame-core wall structure under horizontal load,the stiffness degradation of the floors of the core wall and the frame,and the redistribution degree of shear force are also different.Seismic performance-based design has gradually become an indispensable part of architectural structure design,while the influence of performance objectives and stiffness eigenvalues on the dual lateral resistance of RC frame-core wall structure is rarely studied.The finite element analysis method and software used in this paper are based on the 3d entity degenerated virtual laminated element theory.Firstly,the software is used to carry out simulation analysis on the failure test of RC frame-shear wall structure with three spans and four floors.By comparing the analysis results and test results,the accuracy and practicability of the finite element software are verified.By using PKPM software,this paper established three conventional seismic performance-based design(C)the performance goal under the different stiffness characteristic value(initial share structure underlying framework shear ratio of 21%,18% and 9%)of 30 RC frame-core barrel matrix model,and the structure of the six layer at the bottom of the finite element modeling analysis,research under horizontal load of RC frame is designed according to the conventional performance goals-the law of the lateral resistance at the bottom of the core wall structure,the ultimate bearing capacity of the concrete containing three finite element models,the floor displacement,the interlayer displacement,between the core wall and the framework of floor stiffness degradation and the shear force distribution,As well as the core wall and frame shear distribution and stiffness degradation along the floor height change rules,analysis and draw relevant conclusions.Keep three stiffness matrix model of their respective characteristic values,are respectively and evolution,each matrix model are used to adjust the core barrel,the size of the frame column and the component reinforcement way for B and D contrast model performance,finite element model and set up three groups,each group model stiffness characteristic values are the same,and both contain three seismic performance goals,respectively,according to the standard of B,C,D of the framework-phase axial compression ratio of the core wall model.Through the finite element analysis of the three groups of models,the rules of the influence of different performance targets and stiffness eigenvalues on the bottom deformation of RC frame-core wall structure and the redistribution of floor shear force between the frame and core wall are obtained,providing reference and Suggestions for improving the seismic performance-based design of RC frame-core wall structure.