BRB减震技术在某火电厂主厂房中的应用研究

Application Research of BRB in the Main Machine Hall of A Thermal Power Plant

防屈曲支撑(BRB)作为一种金属屈服耗能支撑构件,克服了普通支撑受压屈曲的缺点,在地震中具有良好的耗能能力和延性。为了研究防屈曲支撑某大型火力发电厂结构中的减震效果,本文采用大型通用有限元软件ABAQUS对设置防屈曲支撑和未设防屈曲支撑的主厂房结构进行了罕遇地震作用下的对比分析,分析结果表明:设置防屈曲支撑以后,构件的损伤程度明显减轻,主厂房结构的抗震性能显著提高,各类构件的抗震性能均满足设计要求,整体结构能够满足规范"大震不倒"的要求。

As a kind of energy dissipation brace members by the yielding of metal,Buckling Restrained Brace（ BRB） can overcome shortcomings of the common brace＇s compression buckling,which has good energy dissipation capacity and ductility under earthquake.To study the Buckling Restrained Brace effect in the main machine hall,the nonlinear finite element analysis software ABAQUS is adopted to analyze the seismic performance of a main machine hall with BRB under rare earthquake and compare the elastic-plastic analysis results under different seismic wave in this paper. The results show that the structural seismic performance improves significantly,＂no collapse under strong earthquake＂can be achieved.