有速度脉冲近场地震下偏心支撑钢框架性态设计方法  

Performance based seismic design method of eccentrically braced steel frames under near-fault earthquake with velocity pulse

作　　者：陶硕[1] 顾强[1] 

机构地区：[1]苏州科技学院土木工程学院,江苏苏州215011

出　　处：《苏州科技学院学报（工程技术版）》2012年第4期20-26,共7页Journal of Suzhou University of Science and Technology （Engineering and Technology）

摘　　要：由于长周期速度脉冲的作用,近场地震会对结构产生严重的速度和位移冲击,根据5条近场地震波建立了屈服点谱(YPS)。基于屈服点谱法方法设计了一榀K型偏心支撑钢框架结构,采用pushover方法和弹塑性时程法对所设计的结构进行了地震反应分析。结果表明,结构的屈服位移基本稳定,层间侧移比满足我国现行抗震规范的要求,结构呈现理想的梁铰屈服机构,证明了对偏心支撑钢框架进行性态设计方法的可靠性。Because of the long-period velocity pulse, the near-fauh ground motion would have an intense impact on structures in the form of velocity and displacement, a total of 5 near-fauh ground motion records were selected to construct the Yield Point Spectra （YPS）. This paper designed a span of K-eccentrically braced steel frame based on the YPS. By the means of Pushover method and nonlinear time history method, the results showed that the yield displacement of the example was fundamentally stable, the ratio of the displacement could satisfy the deformation requirement of the seismic code of our country, and the K-EBF structure takes on the ideal progressively plastic mechanism, which proves the reliability of this new design method.

关 键 词：屈服点谱 K型偏心支撑钢框架 近场地震 速度脉冲 

分 类 号：TU391[建筑科学—结构工程]