Cyclic behavior of saturated soft clay under stress path with bidirectional shear stresses
Cyclic behavior of saturated soft clay under stress path with bidirectional shear stresses
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双向剪应力应力路径下饱和软粘土的循环行为
DOI：
10.1016/j.soildyn.2017.10.016
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发表时间：
2018
影响因子：
4
通讯作者：
Cai Ying
中科院分区：
文献类型：
--
作者：
Hu Xiuqing;Zhang Yan;Guo Lin;Wang Jun;Cai Yuanqiang;Fu Hongtao;Cai Ying
在地震荷载作用下，土层承受不同振幅和频率的多向循环剪应力。因此，复杂应力路径下软粘土的变形行为具有实际意义。在这项研究中，循环试验是在正常固结的软粘土上进行的。为了模拟地震荷载引起的情况，通过在两个方向上同时施加剪应力来实现复杂的“8”字形应力路径。在“8”字形剪应力路径下，发现软粘土的循环应变、循环模量和循环强度显着依赖于 CSR（循环剪应力比）和双向剪切频率。随着 CSR 的增加和剪切频率的降低，动态剪切模量降低，循环应变累积随着循环次数的增加而增加。根据试验结果，提出了预测不同剪切频率下循环强度的经验公式。
Under seismic loading, soil layers experience multidirectional cyclic shear stresses with different amplitudes and frequencies. Therefore, the deformation behavior of soft clay under complex stress paths is practically relevant. In this study, cyclic tests are performed on normally consolidated soft clay. To simulate the situation induced by seismic load, the complex figure-eight-shaped stress path is realized by applying shear stresses in two directions simultaneously. Under the figure-eight-shaped shear stress path, the cyclic strain, cyclic modulus, and cyclic strength of soft clay are found to be significantly dependent on the CSR (cyclic shear stress ratio) and the bidirectional shear frequencies. With an increase in the CSR and a decrease in the shear frequency, the dynamic shear modulus decreases and cyclic strain accumulation increases with an increasing number of cycles. Based on the test results, an empirical formula was presented to predict the cyclic strength under different shear frequencies.
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影响因子：
1.5
作者：
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通讯作者：
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影响因子：
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