Simulation Analysis On The Imapct Of The Horizontal Shear Force Redistribution With Lateral Stiffness Degradation Of R.C Frame-shear Wall Structure

At present, the floor seismic shear force distribution of frame- shear wall structure in “code for seismic design of buildings in China” and the provisions of the " technical specification for concrete structures of tall building " is based on design experience, and does not take into account the different of degree about nonlinear of the frame and shear wall phase after their lateral stiffness degradation under the seismic action,so too general, to supplement and perfect.So the finite element analysis of floor seismic shear force redistribution on lateral stiffness degradation of frame-shear wall structure are very meaningful.This article uses nonlinear finite element analysis which based on the theory of three-dimensional virtual laminated element entity degradation to the frame and shear wall structure plane and space frame-shear wall structure.First in three kinds of axial compression ratio, respectively, the finite element analysis was carried out on the frame and shear wall, to got frame and shear wall in the load-displacement curve and stiffness degradation curve, the analysis of frame and shear wall lateral stiffness degradation.Then select the most unfavorable the axial compression ratio of frame and shear wall in the plane, using four layers frame- shear wall structure in space, by adjusting the number of the framework, it is concluded that the influence of the horizontal shear redistribution of frame- shear wall structure of different initial lateral stiffness ratio,then analyse and research load displacement curve,shear force distribution curve and stiffness degradation curve, etc of structure which in the elastic-plastic stage.Through the above analysis of the data and conclusions, this theory was applied to steel reinforced concrete frame- shear wall structure,and provide reference for 3 d simulation finite element analysis.It can also provide certain theoretical basis for computing research in detail of seismic shear force distribution of practical engineering design of tall frame- shear wall structure in elastic-plastic stage of the framework.