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

RIMI：地震液化条件下层状砂砾石复合材料的行为

• 批准号: 9627989
• 负责人: Farshad Amini
• 金额: $ 15.77万
• 依托单位: University of the District of Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-07-15 至 2000-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9627989&HistoricalAwards=false
• 关键词: RIMI; Behavior; Stratified; Sand; Gravel

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. ***

HRD-9627989 University of哥伦比亚特区 “地震液化条件下层状砂砾复合材料的行为” 本研究旨在探讨层状砂砾石复合材料在地震液化条件下的特性。 分层土壤的特性将针对不同的砾石含量进行评估。 将研究围压变化对砂砾复合材料液化参数的影响，采用两种样品制备方法，即通过空气的pluriding（代表均匀土壤条件）和沉降（代表分层土壤条件）。 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壤特性的理解。 因此，可以为分析研究制定一个概念框架。 拟议的项目将只提供一个基本的进步，模拟这些分层土壤，但也提高了研究能力的土木工程计划在哥伦比亚特区大学。 学生接触实验将提高少数民族在工程学科的代表性。 ***