U.S.-Japan Cooperative Science: Seismic Permanent Displacement of Geosynthetic-Reinforced Soil Structures

美日合作科学：土工合成材料加筋土壤结构的地震永久位移

• 批准号: 9603033
• 负责人: Dov Leshchinsky
• 金额: $ 1.85万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-01 至 1999-04-09
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9603033&HistoricalAwards=false
• 关键词: U.S.; Japan; Cooperative; Science; Seismic

9603033 Leshchinsky This award supports a two year collaborative research project between Professors Dov Leshchinsky and Hoe Ling of the University of Delaware and Professors Jiro Takemura and Tsutomu Kimura of the Tokyo Institute of Technology in Japan. This research project will undertake a study of the long-term performance of geosynthetically reinforced walls and implications of creep and stress relaxation on design. The problem of time-dependent response of geosynthetically reinforced soil structures requires study from the standpoint of fundamental mechanics and current design procedures, for future applications. The major goals are: 1) to experimentally study stress relaxation of selected geosynthetic reinforcement; 2) develop a simple constitutive model to realistically simulate the time dependent behavior of the reinforcement; 3) implement this model into an existing finite element computer code; and 4) conduct an extensive numerical parametric study of geosynthetically reinforced walls at working stress conditions. The proposal brings together two laboratories that have constituted different parts of the process: the Americans will be responsible for conducting the analytical parts of the research and the Japanese will be conducting the centrifuge tests. The results of the research will facilitate the understanding of time dependent behavior of geosynthetic reinforcement interactive with backfill soil and will make the design of such structures more rational. Through the exchange of ideas and technology, this project will broaden our base of knowledge and promote international understanding and cooperation. ***

该奖项支持特拉华大学的Dov Leshchinsky教授和holing教授以及日本东京工业大学的Jiro Takemura教授和Tsutomu Kimura教授之间为期两年的合作研究项目。本研究项目将研究土工合成加固墙的长期性能以及蠕变和应力松弛对设计的影响。土工合成加筋土结构的时间响应问题需要从基础力学和当前设计程序的角度进行研究，以供未来应用。主要目的是：1)对选定的土工合成钢筋进行应力松弛试验研究；2)建立简单的本构模型，真实地模拟钢筋随时间变化的行为；3)将该模型实现到现有的有限元计算机代码中；4)对工作应力条件下的土工合成加筋墙进行了广泛的数值参数研究。该提议将构成该过程不同部分的两个实验室合并在一起：美国人将负责进行研究的分析部分，日本人将进行离心机试验。研究结果将有助于理解土工合成筋与回填土相互作用的时间依赖行为，并将使土工合成筋结构的设计更加合理。通过思想和技术的交流，该项目将扩大我们的知识基础，促进国际理解与合作。＊＊＊