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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。
This paper assumes that the bedrock ground motion is a “Markov” chromatogram. It corrects the static ground motion model of Jin Jingqing by filtering the ground cover soil. In the paper, from the perspective of the application of engineering seismic design, using stochastic extremum theory and statistical analysis of strong earthquake records, the parameters (stationary holding time, spectral intensity factor, and non-stationary intensity function) and seismic intensity of the random ground motion model were determined. The quantitative relationship between site categories and the direct relationship with magnitude, epicentral distance, and site category. The random ground motion correction model and the determined model parameters proposed in this paper directly provide random seismic ground load design criteria for random seismic response analysis and dynamic reliability design of engineering structures.