Nonlinear Static Analysis On Lateral Stiffness Degradation Of RC Frame-Shear Wall Structure

With the improvement of living standards, the construction of the aesthetic demands are also rising. Irregular plate structures has also been a growing popular. However, if the impropriety design of the structure, the structure will be serious damaged under a greater level of force from the earthquake. Concrete and steel are viewed as a whole to work together from current design code of concrete structures which can not be achieved under the larger level of force. Therefore nonlinear static analysis is very meaningful for irregular plane structures.The paper Firstly beginning with the introduction of definition for irregular plane structures and Research of nonlinear static analysis. Secondly, followed with the finite element model and Strain-Stress relationship of RC materials. Detail discussed the Strain-Stress relationship of concrete and steel, as well as the two bond-slip relationship, and so on. Thirdly, all element types needed in Non-linear Finite Element Analysis(NFEA) of RC structure in ANSYS are studied. And then, Besides simulating the process of the experiment and comparing with test results, some else work that the test did not complete is done with ANSYS.The simulation of the two frame structures and a shear-wall structure are good match of the results comparing with the test results in this paper. The FEA results have a fairly good agreement with test ones and the FEA model is proved rational. The behavior of RC structures under load are also well shown which enable a deep research on the mechanics as well as the effects of relative parameters on it. All work mentioned above will play an important role in reducing the experiment work, obtaining more reliable data, furthering the research on the test and so on.It can be obtained member in Stiffness degradation of the force performance as well as the mechanism by Pushover Analysis for mass center and stiffness center positions of different situations when do some researches on the frame-shear wall structure of irregular plane. The formula about magnification factor of the frame shear force under the different stiffness ratio between the frame and the shear-wall can be formed. Comparative analysis of the level of resistance to arrive at the best performance of the power structure of the layout, and then by strengthening the weak position to further improve its mechanical properties and mechanisms for engineering design provides a guide.