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首页> 外文会议>Soil mechanics and foundation engineering >Undrained Cyclic plane Strain Behavior of a Clay
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Undrained Cyclic plane Strain Behavior of a Clay

机译：粘土的不排水循环平面应变特性

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Undrained cyclic plane strain tests were performed to investigate the deformation and strength characteristics of the Ko-consolidated clay. As the result, the following conclusions were obtained: 1) The undrained cyclic strength was larger by about 10% under plane strain condition than under triaxial condition. 2) The cyclic deformation characteristics were clarified due to the confining frame, such as a) the increase of pore pressure in early stage of loading, and b) the sudden increase of axial strain immediately before failure. 3) The undrained cyclic failure for clays occurred in the yielding failure in loading cycles and in the failure due to the stress reversal in unloading cycles. 4) The cyclic behaviour might be predicted from the results of static shear tests except for the large cyclic loading such as the stress reversal. 5) The coefficient of intermediate principal stress, b-value, reached to about 0.30 at failure, which was the same with the one for undrained static shear tests.
机译：进行了不排水的循环平面应变试验，以研究Ko固结粘土的变形和强度特性。结果，得出以下结论：1）平面应变条件下的不排水循环强度比三轴条件下的不排水循环强度大约10％。 2）由于密闭框架而使循环变形特性变得清晰，例如a）加载早期的孔隙压力增加，b）即将失效之前轴向应变的突然增加。 3）粘土的不排水循环破坏发生在加载循环中的屈服破坏和卸载循环中由于应力逆转引起的破坏中。 4）除了较大的循环载荷（例如应力逆转）外，还可以根据静态剪切试验的结果预测循环行为。 5）失效时中间主应力系数b值达到约0.30，与不排水的静态剪切试验中的系数相同。

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