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Random field model of sequential ground motions

机译：顺序地运动的随机场模型

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This paper proposes a random field model of sequential ground motions, which considers the spatial correlation between the mainshock and aftershock from a stochastic view. First, the correlation between the mainshock and aftershock under the physical "source-path-local site" mechanism is explained. Based on the mechanism, the point-source model, and uniform-isotropic-medium model, a random single-point model for sequential ground motion with eight basic parameters is presented. Second, the random field model is developed from the random single-point model. More than 1000 pairs of sequential ground motions are used to identify and analyze statistically the basic parameters in the model. Moreover, the probability distribution of each parameter is presented based on copula functions. The results show that the spatial correlations of sequential ground motions can be effectively simulated based on the proposed random field model. Furthermore, it is possible to realistically reproduce the attenuation and time lag of ground motions at a local site.
机译：本文提出了顺序地面运动的随机性场模型，其考虑了来自随机视图的主轴和余震之间的空间相关性。首先，解释了主轴和余震之间的相关性在物理“源路径 - 本地站点”机制下的相关性。基于机制，点源模型和均匀 - 各向同性介质模型，介绍了具有八个基本参数的顺序地面运动的随机单点模型。其次，从随机单点模型开发了随机字段模型。超过1000对顺序接地运动用于识别和分析模型中的基本参数。此外，基于Copula功能呈现每个参数的概率分布。结果表明，可以基于所提出的随机场模型有效地模拟顺序地运动的空间相关性。此外，可以在本地位点实地再现地面运动的衰减和时间滞后。

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