钢网格盒式结构近场地震非平稳随机动力响应研究  

Study on steel-grid box structural non-stationary random dynamic response under near fault ground motions

作　　者：谈忠坤[1] 马克俭[1,2] 魏艳辉[2] 胡岚[1] TAN Zhongkun;MA Kejian;WEI Yanhui;HU Lan(College of Civil Engineering,Hunan University,Changsha 410082,China;Space Structure Research Center,Guizhou University,Guiyang 550003,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]贵州大学空间结构研究中心,贵州贵阳550003

出　　处：《地震工程与工程振动》2018年第6期71-77,共7页Earthquake Engineering and Engineering Dynamics

基　　金："十二五"国家科技支撑计划(2011BAJ09B01-01)~~

摘　　要：本文针对钢网格盒式结构在3类脉冲近场地震动作用下的非平稳随机动力响应分析展开研究。首先,引用Makris模型模拟三类近场地震动脉冲特性,并结合Clough-Penzien谱推导了近场地震动功率谱。该功率谱不仅能体现近场地震动低频脉冲特性,还能反映结构场地特征。在此基础上,基于虚拟激励法对结构进行了非平稳随机动力响应分析。以结构层间位移角作为评价标准,基于首次穿越破坏准则对结构进行了动力可靠度分析。以某实际钢网格盒式结构作为工程背景进行了数值仿真分析,分析结果表明钢网格盒式结构能较好地抵御近场地震动。Steel-grid box structural non-stationary random dynamic response analysis is researched in this paper. Firstly, three kinds of pulse characteristics of the near fault ground motions are simulated by quoting Makris model. Moreover, the power spectral density of near fault ground motions is deduced, which can reflect both the pulse characteristics of the near fault ground motions and structural site features. The pseudo excitation method is used in the analysis of structural non-stationary random dynamic response.Based on the first-passage failure theory, the analysis of structural dynamic reliability is made with the boundary of structural story drift angle. Taking a practical steel-grid box structure as an example, and its numeral simulation analysis was done. The analysis result indicatessteel-grid box structures are capable of withstanding near fault ground motions.

关 键 词：盒式结构 功率谱 虚拟激励法 层间位移角 首次穿越破坏准则 

分 类 号：TU393.3[建筑科学—结构工程]