<p>In some marine and offshore geotechnical engineerings, the stress state of marine clay is plane strain state. In this study, comparisons between static and dynamic responses under the axisymmetric condition and those under the plane strain condition were studied. The static test results show that the stress–strain and pore pressure characteristics under axisymmetric and plane strain conditions are similar. However, the strength for the triaxial test is smaller than that for the plane strain test, which can be attributed to the fact that the coefficient of the intermediate principal stress under the plane strain condition is larger than 0. The dynamic test results show that the plastic vertical strain (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">$\varepsilon_{1p}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>ε</mi> <mrow> <mn>1</mn> <mi>p</mi> </mrow> </msub> </math></EquationSource> </InlineEquation>), hysteresis characteristics, and resilient modulus (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">$M_{r}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>M</mi> <mi>r</mi> </msub> </math></EquationSource> </InlineEquation>) are significantly different. Under same conditions, <InlineEquation ID="IEq3"> <EquationSource Format="TEX">${\upvarepsilon }_{{{{1p}}}}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi mathvariant="normal">ε</mi> <mrow> <mn>1</mn> <mi>p</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> under the axisymmetric condition is greater than that under the plane strain condition, but inclinations of hysteresis loop and <InlineEquation ID="IEq4"> <EquationSource Format="TEX">$M_{r}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>M</mi> <mi>r</mi> </msub> </math></EquationSource> </InlineEquation> under the axisymmetric condition are smaller than those under the plane strain condition. This is because that the compression in horizontal direction of samples by the cyclic horizontal stress under the plane strain condition. Besides, <InlineEquation ID="IEq5"> <EquationSource Format="TEX">$\varepsilon_{1p}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>ε</mi> <mrow> <mn>1</mn> <mi>p</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> under axisymmetric and plane strain conditions is described by a unified model considering the effects of strengths in different stress states.</p>

Comparative Mechanical Behavior of Marine Clay Under Axisymmetric and Plane Strain Conditions

期刊论文
发表日期：

2026年2月4日

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Bingheng Liu,
Lingwei Kong,
Jianqun Zhu,
Yong Wang,
Guofang Xu,
Pei Ge,
Li Zhao,
Song Yu,
Zhiguo Feng

摘要

In some marine and offshore geotechnical engineerings, the stress state of marine clay is plane strain state. In this study, comparisons between static and dynamic responses under the axisymmetric condition and those under the plane strain condition were studied. The static test results show that the stress–strain and pore pressure characteristics under axisymmetric and plane strain conditions are similar. However, the strength for the triaxial test is smaller than that for the plane strain test, which can be attributed to the fact that the coefficient of the intermediate principal stress under the plane strain condition is larger than 0. The dynamic test results show that the plastic vertical strain ( $\varepsilon_{1p}$ $ε_{1 p}$ ), hysteresis characteristics, and resilient modulus ( $M_{r}$ $M_{r}$ ) are significantly different. Under same conditions, ${\upvarepsilon }_{{{{1p}}}}$ $ε_{1 p}$ under the axisymmetric condition is greater than that under the plane strain condition, but inclinations of hysteresis loop and $M_{r}$ $M_{r}$ under the axisymmetric condition are smaller than those under the plane strain condition. This is because that the compression in horizontal direction of samples by the cyclic horizontal stress under the plane strain condition. Besides, $\varepsilon_{1p}$ $ε_{1 p}$ under axisymmetric and plane strain conditions is described by a unified model considering the effects of strengths in different stress states.