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

Frame shear wall structure is composed by frame structure and shear wall, and combined together to work through the floor. In this situation, frame and shear wall cannot deform in accordance with their original approach to deform, it’s has a new deformation feature that is shear-flexural type of deformation feature. Lateral stiffness of shear wall relative to the frame is large, so the frame-shear wall structure system, when the structure in elastic stage, shear wall stand most of the horizontal forces. But, after the elastic-plastic stage, structures appear redistribution of internal force, then frame to withstand the horizontal force ratio with relative to the ratio of the elastic stage begins to increase, but in the end increase the proportion of how much has not been determined. China’s "high regulation" 9.1.11 has been make the relevant adjustments. However, this adjustment method is put forward relying on engineering experience, therefore it’s need to improve.Firstly, the use of nonlinear finite element analysis which based on the theory of three-dimensional virtual laminated element entity degradation make finite element simulationsimulative analysis on a reinforced concrete frame and a low-riseshear wall structure. Experiment results are compared with the simulation results to verify reasonable and effective of nonlinear finite element analysis which based on the theory of three-dimensional virtual laminated element entity degradation. Then follow reinforced concrete frame shear wall shear wall structure as a first line of defense, the framework for the second line of defense, were selected monolithic shear wall and single-bay frame suitable axial compression ratio, which were selected monolithic shear wall lateral stiffness degradation of the fastest, while the single-bay frame lateral stiffness degradation slowest axial compression ratio, a most unfavorable combination of stiffness degradation rate case, to build three different symmetrical,the bottom of the initial design shear ratio and "clean" reinforced concrete frame shear wall structure. Discussion on frame shear wall structure under horizontal load bearing capacity, the inter-story displacement, shearing force distribution changes in the law of frame and shear wall, with the floor changes in the law, and each lateralstiffness degradation situation. Last, draw conclusions based on the analysis results,and provide a reference for engineering design.