Scholarlink

<p>Shear wave velocity (<i>V</i><sub>s</sub>), maximum dynamic shear modulus (<i>G</i><sub>max</sub>), dynamic shear modulus ratio (<i>G</i>/<i>G</i><sub>max</sub>), and damping ratio (<i>λ</i>) are critical parameters for determining seismic ground motion characteristics in submarine sites. Based on the <i>V</i><sub>s</sub> profiles measured from boreholes in a specific marine area, this study investigated the applicability of existing empirical equations (linking <i>V</i><sub>s</sub> with soil depth, <i>H</i>) for marine soils in this region. Laboratory resonant column tests were conducted to analyze variations in <i>G</i><sub>max</sub>, <i>G</i>/<i>G</i><sub>max</sub>, and <i>λ</i> at different depths (<i>H</i>). The results demonstrated that the quadratic polynomial relationship between <i>V</i><sub>s</sub> and H for terrestrial soils is applicable to sandy soils in the bay but not to cohesive marine soils in the same area. By incorporating soil density (<i>ρ</i>), a new <i>V</i><sub>s</sub> prediction equation suitable for cohesive marine soils in the bay was established. Additionally, marine soils exhibited low shear modulus and high damping ratios, with reduced nonlinearity and hysteresis effects as <i>H</i> increased, leading to higher <i>G</i> and lower <i>λ</i>. Analysis based on the Davidenkov model revealed that parameters <i>α</i> and <i>β</i> are insensitive to <i>H</i>, while the characteristic strain <i>γ</i><sub><i>0</i></sub> increases linearly with <i>H</i>. These findings provide reliable references for the prediction of <i>V</i><sub>s</sub> and the evaluation of dynamic properties of marine soils in the Lingdingyang Bay.</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

Experimental investigation of dynamic shear stiffness and damping ratio characteristics of marine soils in Lingdingyang Bay, China

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月11日

查看全文
  • Yanshen Wu,
  • Bo Qin,
  • Yushun Fu,
  • Qi Wu

摘要

Shear wave velocity (Vs), maximum dynamic shear modulus (Gmax), dynamic shear modulus ratio (G/Gmax), and damping ratio (λ) are critical parameters for determining seismic ground motion characteristics in submarine sites. Based on the Vs profiles measured from boreholes in a specific marine area, this study investigated the applicability of existing empirical equations (linking Vs with soil depth, H) for marine soils in this region. Laboratory resonant column tests were conducted to analyze variations in Gmax, G/Gmax, and λ at different depths (H). The results demonstrated that the quadratic polynomial relationship between Vs and H for terrestrial soils is applicable to sandy soils in the bay but not to cohesive marine soils in the same area. By incorporating soil density (ρ), a new Vs prediction equation suitable for cohesive marine soils in the bay was established. Additionally, marine soils exhibited low shear modulus and high damping ratios, with reduced nonlinearity and hysteresis effects as H increased, leading to higher G and lower λ. Analysis based on the Davidenkov model revealed that parameters α and β are insensitive to H, while the characteristic strain γ0 increases linearly with H. These findings provide reliable references for the prediction of Vs and the evaluation of dynamic properties of marine soils in the Lingdingyang Bay.