| In recent years, with the development of the construction enterprise, China’s steel structure building development is very rapid, Shanghai j in MAO tower (high420m,88layers), world financial center (high492m,101layers), the Jing guang center (high208m,61layers), these buildings are not only satisfying the people’s use the space, also as the city’s landmark, giving the city added a scenery, at the same time, the structure analysis of the steel structure building especially seismic performance analysis playing an important role is very important, and bring many problems in the analysis. In order to adapt to the structure analysis of the steel structure building, the structure analysis method and the analysis software of the building need specialized research and exploration. Along with the computer technology, finite element analysis technology and the development and the perfect of general finite element analysis software, These provide favorable conditions for large complex engineering structure analysis and seismic analysis,Also greatly promote complex high-rise steel building structure analysis technology and the development of design technology.This topic is from the engineering practice, is designed by Design and research institute of yunnan province,and constructed by Kunming Property Company Limited.This is a complex high-rise steel structure building which located in nanping street, a total height155.73m, a total41layers. This topic that the research object is the static and dynamic analysis of the complex high-rise steel construction. For this, three dimension finite element model are established by the universal finite element program and do the calculation analysis work as following.(1) Through the structure static analysis of the high-rise steel building,Get in weak position of structure component under the static,and get in internal force of structure component,Such as axial force, axial stress, bending moment,and so on,these provide reference for the design and selection of the component.(2) Through modal analysis of the finite element model,Get the main vibration type of structure at all direction and basic natural vibration period,To judge the rationality of the vertical and horizontal stiffness and whether form resonance phenomenon or not. (3) Going on earthquake acceleration response spectrum analysis on structure combining results of Modal analysis,Get the decorate of steel columns with big axial force, moment and axial stress, And get elastic layers displacement between floors, and according to<<The seismic design standard of building>>(GB500112001),Going on the anti-seismic structure deformation calculation by its regulation(4) According to differentiate limits of our country building height,the steel structure building is more than allow range of high-rise steel structure building, and the arrangement of steel column, steel beam and steel support are not very rules. The current seismic code provisions:"for irregular building, a special building and high-rise buildings of more higher than allow range, time history analysis under severe earthquake should be used,and as more complement computation ". Time history analysis of seismic wave that involves in the selection and arrangement of the seismic wave, the seismic wave amplitude, the time, frequency.Through the time history analysis, get the elasticity layer displacements of the structure, the equivalent stress of the integral structure and component and total layer shear force,and then going on the anti-seismic structure analysis, judging seismic performance.This paper bases on the needs of the actual project, to go on the calculation analysis of the above aimming at the structure, and finally the results provide the theory for the seismic design of the structure basis, at the same time, finite element modeling of complex high-rise steel structure building in ANSYS show that before and after processing functions and ANSYS solver can solve the complex and huge engineering problem... |
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