Seismic Response of Geosynthetic/Soil Systems

9402250在岩土工程和岩土环境工程实践中，土工合成材料的使用继续迅速增长，例如在土工膜衬砌渠道、水库、危险废物容器和城市垃圾填埋场。这些岩土结构对动力或地震荷载的响应在设计或研究中没有得到充分的解决。认识到垃圾填埋场潜在的地震脆弱性，0。环境保护局(EPA)已经制定了指导方针，从1993年10月起生效，要求对所有新的垃圾填埋场进行地震安全评估。因此，迫切需要更好地了解用于垃圾填埋场渗漏控制的土工合成材料/土壤系统的地震反应。本项目的重点是垃圾容器和垃圾填埋场结构的地震安全性。其目的是：1.了解土工合成材料/土工合成材料，更重要的是土工合成材料/土壤界面的动态界面剪切行为。2.建立了预测简单土工合成材料/土系统动力响应的数学模型。3.利用振动台试验结果对分析模型进行了验证。该研究计划将提供对土工合成材料/土壤系统的动态响应的了解；对于合理评估包含土工合成材料的岩土或地质环境设施的地震安全性至关重要的知识，如废物围栏或垃圾填埋场。***

9402250 Yegian The use of geosynthetics in geotechnical and geoenvironmental engineering practice continues to grow rapidly, such as in geomembrane-lined canals, reservoirs, hazardous waste containment and municipal landfills. The response of these geotechnical structures to dynamic or seismic loading is not being adequately addressed in design or in research. Recognizing the potential seismic vulnerability of landfills, the 0. Environmental Protection Agency (EPA) has established guidelines, effective October 1993, requiring seismic safety evaluations of all new landfills. Hence there is an urgent need for improved understanding of the earthquake response of geosynthetic/soil systems used for seepage control in landfills. This project focuses on the seismic safety of waste containment and landfills structures. The objectives are to: 1. Understand the dynamic interface shear behavior of geosynthetic/geosynthetic and, more importantly, geosynthetic/soil interfaces. 2. Develop a mathematical model for predicting the dynamic response of simple geosynthetic/soil systems. 3. Validate the analytical model by using shaking table test results. This research program will provide an understanding of the dynamic response of geosynthetic/soil systems; knowledge that is essential for a rational evaluation of the seismic safety of a geotechnical or a geoenvironmental facility that incorporates geosynthetics, such as a waste containment or a landfill. ***