Seismic Response of Geosynthetic/Soil Systems

9402250 Yegian土工合成材料在岩土工程和地质环境工程实践中的应用持续快速增长，例如在土工膜衬砌的运河、水库、危险废物控制和城市垃圾填埋场中。 在设计或研究中，这些岩土结构对动态或地震荷载的反应没有得到充分的解决。 认识到垃圾填埋场的潜在地震脆弱性，0。美国环境保护署（EPA）已经制定了指导方针，自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，迫切需要提高对用于填埋场渗流控制的土工合成材料/土壤系统的地震响应的理解。 该项目的重点是废物容纳和垃圾填埋场结构的地震安全。 其目标是： 1.了解土工合成材料/土工合成材料的动态界面剪切行为，更重要的是，土工合成材料/土壤界面。 2.开发一个数学模型，用于预测简单土工合成材料/土壤系统的动态响应。 3.利用振动台试验结果对分析模型进行了验证。 该研究计划将提供土工合成材料/土壤系统的动态响应的理解;知识，这是必不可少的土工或地质环境设施，包括土工合成材料，如废物控制或垃圾填埋场的地震安全性的合理评估。 ***

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. ***