RIMI: Behavior of Stratified Sand-Gravel Composites Under Seismic Liquefaction Conditions

HRD-9627989哥伦比亚特区大学《层状砂砾复合材料在地震液化条件下的行为》拟议的研究旨在提供层状砂砾复合材料在地震液化条件下的行为调查。对于不同的砾石含量，将对分层土壤的特性进行评估。采用两种制样方法，即空气充填(代表均匀土质)和沉降法(代表层状土质)，研究了围压变化对砂石复合材料液化参数的影响。哥伦比亚特区大学的应力控制自动循环三轴试验将用于评估液化潜力。本研究的主要目的是比较不同砾石含量和围压条件下层状和均质砂砾复合材料在地震液化条件下的行为。这种比较将加深我们对地震液化条件下土体特性的理解。因此，可以为分析研究建立一个概念性框架。拟议中的项目不仅将为这些层状土壤的建模提供根本性的进步，而且还将提高哥伦比亚特区大学土木工程项目的研究能力。学生接触到这些实验将提高少数族裔在工程学科中的代表性。***

HRD-9627989 University of District of Columbia "Behavior of Stratified Sand-Gravel Composites Under Seismic Liquefaction Conditions" The proposed research is to provide an investigation of the behavior of stratified sand-gravel composites under seismic liquefaction conditions. The behavior of stratified soils will be evaluated for different gravel contents. The effect of variation of confining pressure on the liquefaction parameters of sand-gravel composites will be investigated for two methods of sample preparation, namely pluviation through air (representing uniform soil conditions) and sedimentation (representing layered soil conditions). The stress-controlled automated cyclic triaxial tests at the University of the District of Columbia will be used for the purpose of evaluating liquefaction potential. The primary objective of the proposed study is compare the behavior of stratified and homogeneous sand-gravel composites under seismic liquefaction conditions for various gravel contents and confining pressures. Such comparison will enhance our understanding of soil behavior under seismic liquefaction conditions. As a result, a conceptual framework for analytical studies can be made. The proposed project will only provide a fundamental advancement for modelling these layered soils, but also improve the research capability of the civil engineering program at the University of the District of Columbia. Student exposure to the experiments will enhance the representation of minorities in engineering disciplines. ***