DEGRADATION OF MARINE CLAYS UNDER CYCLIC LOADING
DEGRADATION OF MARINE CLAYS UNDER CYCLIC LOADING
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DOI：
10.1061/(asce)0733-9410(1988)114:2(133
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发表时间：
1988-02
期刊：
影响因子：
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通讯作者：
M. Vucetic;R. Dobry
中科院分区：
文献类型：
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作者：
M. Vucetic;R. Dobry
研究了超固结比（OCR）对粘土循环剪切模量退化的影响。该研究基于一系列应变控制、定容、循环、简单剪切试验，这些试验对固结至OCR=1、2和4的委内瑞拉近海粘土样品进行。模量退化与循环次数成功地模拟了不同的OCR的使用表达式以前应用到正常固结粘土。循环模量退化率随着OCR的增加而降低，动态应力-应变主干曲线可以通过最初建议用于归一化静态应力-应变曲线的SHANSEP方法的扩展来建模。一个图表也开发了正常固结的海洋粘土从委内瑞拉，加州，阿拉斯加，这表明，模量退化率参数t，对应于一个给定的循环应变，是类似的粘土，与t减少的塑性粘土的增加。另外，一个比较的赌注...
A study of the effect of the overconsolidation ratio (OCR) on the cyclic shear modulus degradation of clay is presented. The research is based on a series of strain‐controlled, constant‐volume, cyclic, simple‐shear tests conducted on samples of an offshore Venezuelan clay consolidated to OCR=1, 2, and 4. The modulus degradation with number of cycles is successfully modeled for different OCR's using an expression applied previously to normally consolidated clays. The rate of cyclic modulus degradation decreases with increased OCR, and the dynamic stress‐strain backbone curves can be modeled by an extension of the SHANSEP method originally suggested for normalizing static stress‐strain curves. A chart is also developed for normally consolidated marine clays from Venezuela, California, and Alaska, which indicates that the modulus degradation rate parameter t, corresponding to a given cyclic strain, is similar for similar clays, with t decreasing as the plasticity of the clay increases. Also, a comparison bet...