Undrained stress-strain behavior of sand under irregular loading.
Undrained stress-strain behavior of sand under irregular loading.
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不规则荷载作用下砂的不排水应力应变行为。
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
M. L. Silver
中科院分区：
文献类型：
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作者：
F. Tatsuoka;M. L. Silver
本文总结了一个理论和实验室研究，以开发一个程序来预测循环不排水应力-应变-时间行为的无粘性土在不规则的循环荷载模式。结果发现，在给定的不规则的循环荷载模式下，在砂土中诱导的最大剪切应变振幅可以预测从均匀循环荷载的砂土的应力-应变行为的知识，通过使用累积损伤的概念。然而，累积损伤的概念不能充分预测的应变-时间历程的砂，和一个新的分析方法占恶化的应力-应变特性的砂被开发，以提供这方面的信息。循环不排水简单剪切试验的砂进行均匀和循环不规则荷载，以确认理论评估。理论计算结果与试验结果比较吻合。
This paper summarizes a theoretical and laboratory investigation to develop a procedure to predict the cyclic undrained stress-strain-time behavior of cohesionless soils under irregular cyclic loading patterns. It was found that the maximum shear strain amplitude induced in sand under a given irregular cyclic loading pattern can be predicted from a knowledge of the stress-strain behavior of the sand for uniform cyclic loading by using the cumulative damage concept. However, the cumulative damage concept cannot adequately predict the strain-time history of sand, and a new analytical method accounting for the deterioration in the stress-strain characteristics of sand was developed to provide this information.Cyclic undrained simple shear tests on sand were performed using uniform and cyclic irregular loadings to confirm the theoretical evaluations. Theoretical results compared with the test results showed good agreement.