| Many highrise duildings are used the EBSF structure system, in overseas regions, especially in some strong earthquake zones. In order to provide the theoretical bases and practical way for project design, and be helpful to the comprehension of the design procedures for the designers and popularization of this system. The following main section of research work been done:(1)on the base of large quantity of home and alien data, this article introduces the relevant developing situation of EBSF inside and outside china and the working principle and the simplified design method of the structural components.(2)the article further presents the method of seismic analysis and three kinds of solutions to dynamic equation.(3)the typical models of high-rise EBSF structure about different lengths of active beam link, different ratio of span to height, different slenderness ratio and different layouts of brace was set up. Whose seismic properties are analyzed by finite element software sap2000,through analyzing the results of calculation, this article presents the influencing law on seismic behavior.Eccentric braced steel frame is a new type of eccentric supporting structure with good stiffness, ductility and energy dissipation capacity. By use of nonlinear finite element analysis software Sap2000,this paper establishes a6-layer model of light weight steel frame, center support and eccentric support for the model were arranged. by calculating seismic performance of three structures model under horizontal earthquake.and by comparing the lateral stiffness, vibration period and its seismic response of the three structures model under load, it analyses the impact of eccentric brace for seismic performance of light weight steel structure residence. |
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