Computer Modeling of Granular Soils Under Cyclic Loading: A Particulate Mechanics Approach

对循环荷载作用下土体特性的基本认识 机器基础和施工选址等条件 在交通繁忙的情况下，最好的情况是不足够的。 一 在大型施工作业中通常使用较高的安全系数 由于无法定量预测土壤的行为下， 了以下条件 本研究建立了一个颗粒土模型， 一种适用于各种应变的颗粒力学方法， 增量加载条件 具体的量化模型将 在实验室条件下和根据现场数据开发和验证。 该研究系统地努力开发土壤模型， 比较了宏观预测，并将结果与 微观力学现象在晶粒和接触水平。 结果将 提供定量 致密化现象的验证 由调查员开发。 大规模的实验 研究将在一个独特的测试设施中进行，与 德克萨斯大学 首席研究员是该研究领域公认的专家。 建议提供赠款。

A fundamentel understanding of soil behavior under cyclic loading conditions such as in machinre foundations and construction siting conditions under heavy vehicular traffic is, at best, inadequate. A high safety factor is generally used in large construction operations due to the inability to quantitatively predict the soil behavior under these conditions. The research develops a model of granular soils based on a particulate mechanics approach for a wide range of strains and incrementel loading conditions. Specific quantitative models will be developed and verified under laboratory conditions and from field data. The research makes systematic efforts to develop soil models and compares the macroscopiv ptedictiond and relates the results with the micromechanic phenomena at grain and contact levels. The results will provide quantitative verification of the densification phenomena developed by the investigator. Large scale experiments for this research will be carried in a unique test facility, in cooperation with the University of Texas. The principal investigator is a recognized expert in this research area. A grant is recommended.