摘要
根据随机振动理论,研究了土层随机地震反应动力分析方法,介绍了场地土在动剪模量的变化分别为线性和指数时动力方程的求解问题,分别给出了基岩输入地震加速度为白噪声和过滤白噪声时土层反应及各阶振型反应的统计参数,从而建立了可靠性分析的计算方法,并且对同一场地土采用两种动剪模量变化形式进行了自振频率的对比计算和动力可靠度计算。
On the basis of random vibration theory, the analysis methods for soil layer＇s random seismic response dynamic are studied in this paper.And the solutions to the dynamic equations when the dynamic-shear-modulus of ground soil varies between linear and index are introduced. For when the bedrock inputting seismic acceleration is white noise or filter white noise, the soil layer＇s response and the statistic parameters for each vibration response are also given respectively, which establishes a reliable analysis calculafive method. And also the natm＇al frequencies comparison calculation and the dynamic reliability calculation are carried out for the same ground soil under the two different dynamic-shear-modulus variations.
出处
《工程抗震与加固改造》
2007年第1期26-29,32,共5页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金资助项目(50578062
50278033)
关键词
场地土
土层
地震随机反应
动剪模量
自振频率
可靠度
ground soil
random response
dynamic shear modulus
natural frequency
dynamic reliability
