摘要
由于地震的随机性,开展地下结构随机地震响应及其抗震可靠度分析具有重要的实际意义。本文从有限元动力分析的基本原理出发,利用脉冲响应函数和傅立叶变换原理,研究了将地震荷载作为平稳随机过程时地下结构随机地震响应分析方法,导出了平稳随机地震作用下地下结构动力响应的数字特征计算表达式。分析了地下结构在某烈度地震作用下和设计基准期内的抗震可靠度。
Because of the randomization of earthquake motion, the analysis of the stochastic seismic responses and aseismic reliabilities of the underground structures should be of practical significance. Based on the basic principles of dynamic analysis by using the finite element method, an analysis method of the stochastic seismic responses of the underground structures is studied and the formulas for evaluating the statistical characteristics of the stochastic earthquake responses of the underground structures are derived by using the impulse-response function and the principles of Fourier Transform. As an example, the aseismic reliabilities of an underground structure are analyzed. The earthquake loads are taken into account as in a stationary random process.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2004年第5期96-100,共5页
Journal of the China Railway Society
基金
甘肃省自然科学基金项目(ZS021 A25 020 G)
兰州交通大学"青蓝"人才工程基金资助计划资助
关键词
地下结构
随机地震响应
脉冲函数
傅立叶变换
抗震可靠度
underground structures
stochastic seismic responses
impulse function
fourier transform
earthquake resistance reliability
