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Volume 39 Issue 2
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LIU Zhong-xian, HUANG Lei, LIANG Jian-wen. FEM -IBIEM coupled method for simulating scattering of seismic waves by 3-D complex local site[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(2): 301-310. DOI: 10.11779/CJGE201702014
Citation: LIU Zhong-xian, HUANG Lei, LIANG Jian-wen. FEM -IBIEM coupled method for simulating scattering of seismic waves by 3-D complex local site[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(2): 301-310. DOI: 10.11779/CJGE201702014
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FEM -IBIEM coupled method for simulating scattering of seismic waves by 3-D complex local site

  • 1. Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, China;
    2. Department of Civil Engineering, Tianjin University, Tianjin 300072, China

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  • Received Date: November 26, 2015
  • Published Date: March 24, 2017
    Abstract
  • A hybrid technique, FEM-IBIEM is developed for studying the scattering of seismic waves by a 3-D complex local site. The indirect boundary integral equation method (IBIEM) adopts the dynamic Green's functions of concentrated loads for a layered half-space. It can accurately satisfy the radiation condition of waves in semi-infinite layered media and greatly reduce the computational memory. For the local site with complex materials and geometric features, FEM is more convenient. Based on accuracy tests and taking the seismic wave scattering resulting from 3-D sedimentary basins and mountains as the example, the adaptability of the proposed method for the seismic response in the complex local site is conformed, and several beneficial conclusions about the 3-D sedimentary basin effects and mountain vibration are drawn. This method can be used for studying the scattering of elastic waves by arbitrary inhomogeneous site in layered half-space.
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    LIANG Jian-wen

    • 1. Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, China;
      2. Department of Civil Engineering, Tianjin University, Tianjin 300072, China

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