空间变异地震作用下大型连续刚构桥的延性性能研究  

BEHAVIOR OF LONG SPAN RIGID FRAME RC BRIDGES SUBJECTED TO SPATIAL VARYING GROUND MOTION: (1) GENERATION OF SPATIAL VARYING GROUND MOTION BASED ON PHASE DIFFERENCE SPECTRUM

作　　者：姜海鹏[1] 王航[1] 杨庆山[1] 

机构地区：[1]北方交通大学,北京100044

出　　处：《铁道工程学报》2001年第2期37-46,共10页Journal of Railway Engineering Society

基　　金：国家自然科学(青年)基金资助项目(59708007)的部分内容

摘　　要：本文在前人工作的基础上提出了一种直接生成具有时－频非平稳特性的空间变异地震动的方法，即随机过程理论与相位差谱相结合的方法。此方法由于引入了相位差概念并结合已有的自功率谱、相干函数、视速度模型，从而使得生成具有时－频非平稳特性的空间变异地震动的过程更为直接和简便。最后通过几个合成示例说明了这种方法的有效性，可以用于结构多点输入地震反应分析。This paper presented a method to simulate the spatial varying ground motion with time-frequency non-stationarity, which combined the knowledge of stochastic process and phase-difference spectrum. This method with some empirical power spectrum density(PSD)models,coherency function models and the modles of apparent velocity can make it easy and directly to be done that generates the spatial varying ground motions be- cause of importing the concept of phase-difference. At last,some illustrations were presented to prove that this method aforementioned is effective and can be used in the response analyses of structure subjected to multiple input ground motion.

关 键 词：空间变异地震动 相位差谱 时-频非平稳性 相干函数 

分 类 号：U442[建筑科学—桥梁与隧道工程]