Simulation Research For Lateral Stiffness Degradation Based On Three-Dimension Solid Virtual Laminated Element Theory Of Frame-shear Wall Structure

Nowadays, reinforced concrete structures still has disadvantage in the study ofthree-dimensional simulation. In this paper, we explore a kind of three-dimensionalsimulation analysis of reinforced concrete structure system which has generalapplication and clear introduction of mechanical concepts based on the study ofdegenerated three-dimension solid virtual laminated element theory.Collaborative work mechanism of the frame shear wall structure has a closeassociation with relative stiffness of the frame and hear wall, and there is a certainvariation rule. With the improvement of people’s aesthetic requirements of thebuilding, the structure of irregular plane gain the interest of everyone. As such anirregular structure, if its stiffness center and centroid do not coincide, it will have atorsional effect under the function of the horizontal load and if it is not handledproperly in the design, it will make a serious damage in the influence of largehorizontal seismic.In this paper, FEM analysis program is used based on the three-dimension solidvirtual laminated element theory to analyze the frame shear wall structure nonlinearthrough nonlinear element analysis. Firstly, element analysis was used separately forframe and then the load-displacement curves of the structure were obtained.Compared with the results of the test, it could be found the results obtained in thedegenerated three-dimension solid virtual laminated element theory analysis had agood agreement with results of the experiment. Then, a two-story frame shear wallstructure was designed through changing relative stiffness of the frame and shearwall by increase or decrease the numbers of the frame, and calculating the situationof the forces of each member under the function of the horizontal load, analyzing andstudying its load-displacement curves、shear-distribution curves、modulus degeneratecurves、load-rotation curves as well as the change the of relative position of justheart and centroid.In conclusion, the results obtained in this paper can provide reference toapplying this theory to the nonlinear element analysis of the three-dimension simulation future framework of the spatial structure of frame-shear wall. And it willprovide valuable theoretical basis for the practice the design of engineering.