金塘海峡海洋土动剪切模量与阻尼比特性研究∗

陈国兴

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金塘海峡海洋土动剪切模量与阻尼比特性研究∗

更新时间：2025-09-25

- 金塘海峡海洋土动剪切模量与阻尼比特性研究∗
- Experimental Studies on the Dynamic Shear Modulus and Damping Ratio Characteristics of Marine Soils in the Jintang Strait
- 防灾减灾工程学报 2020年第1期页码：1-8
- 作者机构：
  
  南京工业大学岩土工程研究所,江苏,南京,210009
- 作者简介：
- 基金信息：
  
  国家重点研发计划项目(2017YFC1500403)资助
- DOI：
  中图分类号： TU443
- 纸质出版：2020
- 稿件说明：
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陈国兴,杨文保,岳文泽,秦悠.金塘海峡海洋土动剪切模量与阻尼比特性研究∗[J].防灾减灾工程学报,2020,(1):1-8

CHEN Guoxing. Experimental Studies on the Dynamic Shear Modulus and Damping Ratio Characteristics of Marine Soils in the Jintang Strait[J]. 2020, (1): 1-8.
陈国兴,杨文保,岳文泽,秦悠.金塘海峡海洋土动剪切模量与阻尼比特性研究∗[J].防灾减灾工程学报,2020,(1):1-8 DOI：

CHEN Guoxing. Experimental Studies on the Dynamic Shear Modulus and Damping Ratio Characteristics of Marine Soils in the Jintang Strait[J]. 2020, (1): 1-8. DOI：

摘要

为探究金塘海峡各类海洋土的动剪切模量G与阻尼比λ特征，对金塘海峡四个钻孔不同埋深的各类原状海洋土进行了系列室内共振柱试验，试验结果表明：(1) 各类海洋土均呈现出“低剪切模量，高阻尼比”的强非线性与滞后性特性；各类海洋土的最大动剪切模量Gmax均随埋深的增加而增大，且粉质黏土、粉土、粉质黏土混粉砂、粉砂的Gmax随埋深的增长速率依次减慢。(2) 随着埋深的增加，各类海洋土的G/Gmax — γ曲线移向右上侧，非线性特性减弱；相反，λ — γ曲线移向右下侧，土体的滞后性减弱。(3) 给出了金塘海峡各类海洋土G/Gmax — γ和λ — γ曲线随埋深变化的参数值。

Abstract

In order to explore the characteristics of dynamic shear modulus G and damping ratio λ for various marine soils in the Jintang Strait

a series of resonant column tests were carried out on various undisturbed marine soils with different depth from four sampling boreholes in the Jintang Strait. The test results show that: (1) various marine soils exhibit strong nonlinearity and hysteresis characterized by “low shear modulus and high damping ratio”; the maximum dynamic shear modulus Gmax for various marine soils increases with increasing depth

and the increasing rate of Gmax with soil depth decreases follwing the sequence of silty clay

silt

silty clay mixed silty sand and silty sand. (2) with increasing depth

the G/Gmax — γ curves of various marine soils shift towards the upper right characterized by low nonlinearity

while the λ — γ curves move downward and rightward characterized by decreasing hysteresis. (3) parameters of G/Gmax — γ and λ — γ curves of various marine soils with depth in the Jintang Strait are presented.

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references

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