结构随机延性需求谱的应用研究  

APPLICATION RESEARCH ON PROBABILITY DUCTILITY DEMAND SPECTRUM

作　　者：张海燕[1] 易伟建[1] 

机构地区：[1]湖南大学土木工程学院,长沙410082

出　　处：《工程力学》2006年第6期11-15,20,共6页Engineering Mechanics

基　　金：国家自然科学基金资助项目(50378034);教育部博士点专项基金资助项目(20030532020)

摘　　要：结构的地震反应危险性曲线体现了结构的地震反应与地震动强度之间的关系,采用随机延性需求谱可以很方便地建立结构的地震反应危险性曲线。非线性结构在随机地震作用下的位移反应分析属于非线性随机振动问题,采用随机延性需求谱可以简单而有效的获得非弹性单自由度体系的随机位移反应的统计量,结合非线性静力分析,还可以进行多自由度结构的随机地震反应分析。此外,随机延性需求谱还可以用于结构的抗震可靠度分析。Seismic response hazard curves of a structure represent the relationship between the seismic response of a structure and the intensity of earthquake. Using the probabihstic ductility demand spectrum, the seismic response hazard curves＇ of a structure can be established conveniently. Displacement response analysis of nonlinear structures under stochastic seismic is attributed to nonlinear stochastic vibration. The statistic of stochastic displacement response of nonlinear single-degree-of-freedom systems can be simply and effectively obtained by the probabilistic ductility demand spectrum. Combined with nonlinear static analysis, probabilistic ductility demand spectrum can be applied to the analysis of stochastic seismic response of multi-degree-of-freedom systems. Furthermore, probabilistic ductility demand spectrum can be utilized in seismic structural reliability analysis.

关 键 词：工程抗震 危险性曲线 延性需求谱 非线性静力分析 随机地震反应 抗震可靠度 

分 类 号：P315.9[天文地球—地震学]