Research On The Seismic Behavior Of Reinforced Concrete Shear Wall Structure Based On Perform-3D

Linear elastic analysis no longer meets the actual requirement of the fast development of seismic theory, architectural form, calculation means and so on. It is urgent to set up the inelastic analysis method in global structural analysis. Because of the complex and lack of tools, inelastic analysis is usually carried out on structural members only, but not for the global structure. Finite element method based on macro element,which has fewer degrees and effective computation, can be applied to global structural nonlinear analysis which has great prospect in engineering application. The results should be compared with tests to prove their accuracy.This paper presents the nonlinear analysis with shear wall element model by Perform-3D, which is a 3-dimensional nonlinear analysis software. The model is according to the full scale reinforced concrete shear wall structure shaking table test. Dynamic nonlinear analyses have been completed. Analysis results are compared with that of shaking table test to study the accuracy of nonlinear analysis of macro models.Firstly, the research situation of shear wall modals and characteristics of Perform-3D procedure are introduced. The process of the full scale reinforced concrete shear wall structure shaking table test is introduced, which was carried out in the University of California at San Diego. In order to build up the global model of the 7-story shear wall structure, material parameters are calibrated by simulating material tests, and element constitutions used in shear wall model are defined. Before the nonlinear time-history analysis is carried out, linear time-history analysis is conducted in both ETABS and Perform-3D to verify that Perform-3D models are reasonable. Secondly, dynamic nonlinear analysis model under 4 different intensity earthquakes are conducted respectively. Some issues about the number of fibers in element sections and the finite element mesh are discussed.Lastly, the practical application of Perform-3D procedure in an actual project is introduced. Based on the elastic analysis under frequent and moderate earthquake action, inelastic time history analysis under rare earthquake is carried out using Perform-3D. The analytical results are reasonable by comparing the analysis of elastic and elasto-plasticity., and indicate the adequate lateral performance of the towers. It can also be concluded that the damper can effectively improve the seismic performance of structures and reduce the nonlinear damage of the components.Compared with the experimental results, the analytical results confirm that the nonlinear analysis method based on shear wall element, which saves the computational costs due to fewer DOFs, can reflect inelastic behavior of structure. It is found that the shear wall element in Perform-3D procedure can be applied to global inelastic analysis for multiedstroy and high-rise reinforced concrete shear wall structures under earthquake actions in 7 and 8 degrees.