• ISSN 2097-1893
  • CN 10-1855/P

地震动空间变化随机描述及相干函数模型研究进展

Reviewing of stochastic description of the spatial variation of ground motion and coherence function model

  • 摘要: 本研究主要讨论地震动空间变化的随机描述. 首先给出了基于密集地震台阵记录估计相干函数的方法,并对计算中需要关注的问题给出了相应的解释;然后对现有的经验和半经验相干函数模型的建立进行了详细的梳理,并对模型在工程应用中的适用性、有效性和局限性进行了讨论;最后通过对比分析不同相干函数模型对场址地震动空间相关性的模拟结果,对相干函数模型的选择提出了建议.

     

    Abstract: This study addresses the topic of the spatial variation of seismic ground motions as evaluated from data recorded at dense instrument arrays. It concentrates on the stochastic description of the spatial variation, and focuses on spatial coherency. The estimation of coherency from recorded data and its interpretation are presented. Some empirical and semi-empirical coherency models are described, and their validity and limitations in terms of physical causes discussed. Finally, by comparing and analyzing the simulation results of different coherence function models on the spatial correlation of ground motion, some suggestions on the selection of coherence function model are put forward.

     

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