The Aseismatic Performance Analysis Of A Frame

With the development of city construction, the number of complicated tall building structures is increasing rapidly in our country, some of which go beyond the limitations of Design Codes. The complicated constructions are subjected to complex forces as compared with common buildings, and no test has undergone a major earthquake, it is hard for engineers to recognize the weak parts of the structure, which increases the probability of such structural damage. Thus, the research On their behaviors under the seismic action is essential. In this paper, based on an actual engineering case, it developed research for a transfinite frame-core Wall Structure with Strengthened stories.In this paper, a three-dimensional nonlinear analysis model of a high-rise building was established for this tall building structure in the nonlinear analysis and performance assessment soft called PERFORM-3D. And developed research in several aspects as following:1) Modal analysis:Natural frequency and natural period of the structure's 15 order modes were obtained in modal analysis. The dynamic characteristics Of the building were displayed, and gives the corresponding comments.2) Dynamic nonlinear analysis under rare earthquake:This paper used the nonlinear analysis and performance assessment soft called PERFORM-3D mentioned above, the time history analysis Of this building was carried out under the three seismic waves(two natural waves and one man-made wave). The seismic performance of the complicated structure was assessed in conjunction with the earthquake response under different seismic waves, including the overall response which indicators:Displacement curve under the Seismic condition, Maximum inter-story drift angle curves, curve of maximum story shear force, time history curve of the structure's base shear, top displacement and inter-story drift angle. As well as the component injuries. thus we can have a comprehensive recognition about the seismic performances of the structure. we can get full understanding of the seismic performance of structures under the rare earthquake.