【摘要】 本文假定基岩地震动为“马尔柯夫”有色谱,通过地表覆盖土层的滤波,修正了金井清的随机地震动模型。文中从工程抗震设计的应用角度出发,利用随机极值理论和强震记录统计分析的结果,确定了随机地震动模型的参数(平稳持时、谱强度因子和非平稳强度函数)与地震烈度和场地类别的定量关系以及直接与震级、震中距和场地类别的定量关系。本文提出的随机地震动修正模型和确定的模型参数直接为工程结构的随机地震反应分析和动力可靠性设计提供了初步可用的随机地震动荷载设计标准。更多还原

【Abstract】 In this paper, based on kanai’s model,a modified random process model of earthquake ground motion is presented by taking the bedrock acceleration as a Markov’s one and the soil layer as a single-degree-of-freedom filter. Then, from, the view of engineering aseismic desigr, the paremeters in the model, the stationary duration, spectral factor and strength envelope function, respectively corresponding to the earthquake intensity degree and site soil class and directively to the earthquake magnitude, epicentral distance and site soil class are determined by using the random extreme value theory and statistical analysis results of strong earthquake records. The modified model and determined parameters in the paper directively provides with the design standard of random earthquake load used in the random seismic response analysis and dynamical reliability design of engineering structures.更多还原