Scholarlink

<p>Site effects study has always been a key research topic in earthquake engineering. This study proposes a hybrid method to analyze large-scale three-dimensional sedimentary basin under Rayleigh (R) wave incidence. The proposed hybrid method includes two steps: 1) calculate the free field responses of layered sites subjected to R-wave using the frequency-wavenumber method; 2) Simulate the local site region using spectral element method with the equivalent forces input computed from the free field responses. A comprehensive verification study is conducted demonstrating the accuracy of this method. To investigate the effect of sedimentary basin on R-wave propagation, a parametric study is performed on the medium impedance contrast ratio of sedimentary basins and the incident seismic wave predominant frequency, revealing the scattering patterns of sedimentary basins under R-wave incidence. Finally, a practical case of the Wudu Basin in the Tibetan Plateau region of China is simulated. Results indicate significant amplification of R-wave by sedimentary basin, and the proposed hybrid method could serve as a reliable and efficient approach for large-scale R-wave propagation simulation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of a large-scale three-dimensional sedimentary basin on Rayleigh wave propagation by using spectral element method combined with frequency-wavenumber method

  • 期刊论文

  • 发表日期：

    2025年7月19日

查看全文
  • Zhenning Ba,
  • Chenyang Kuo,
  • Fangbo Wang,
  • Jianwen Liang

摘要

Site effects study has always been a key research topic in earthquake engineering. This study proposes a hybrid method to analyze large-scale three-dimensional sedimentary basin under Rayleigh (R) wave incidence. The proposed hybrid method includes two steps: 1) calculate the free field responses of layered sites subjected to R-wave using the frequency-wavenumber method; 2) Simulate the local site region using spectral element method with the equivalent forces input computed from the free field responses. A comprehensive verification study is conducted demonstrating the accuracy of this method. To investigate the effect of sedimentary basin on R-wave propagation, a parametric study is performed on the medium impedance contrast ratio of sedimentary basins and the incident seismic wave predominant frequency, revealing the scattering patterns of sedimentary basins under R-wave incidence. Finally, a practical case of the Wudu Basin in the Tibetan Plateau region of China is simulated. Results indicate significant amplification of R-wave by sedimentary basin, and the proposed hybrid method could serve as a reliable and efficient approach for large-scale R-wave propagation simulation.