Long-Term Performance of Geosynthetically Reinforced Walls: Implications of Creep and Stress Relaxation on Design

摘要CMS9523141主要研究者：Kaliakin等人，特拉华州大学 土工合成加筋土结构的时变响应问题需要从基本力学的角度进行研究，并且需要注意当前的设计程序和未来的应用。 站在一个彻底了解的时间依赖性行为的方式是缺乏应力松弛实验数据，并缺乏一个强大的本构模型的钢筋，将占蠕变和应力松弛在一个合理的方式。 研究的主要目标是：1）实验性地研究所选土工合成物加固物的应力松弛，2）开发简单的本构模型以真实地模拟加固物的时间相关行为，3）将该模型实施到现有的FE计算机代码中，并验证该模型的预测能力，以及4）在工作应力条件下对土工合成加筋墙进行广泛的数值参数研究。 研究结果将有助于理解土工合成材料加筋体与回填土相互作用的时变特性，使此类结构的设计更加合理。

ABSTRACT CMS9523141 PI: Kaliakin, et al., University of Delaware The problem of time-dependent response of geosynthetically reinforced soil structures requires study from the standpoint of fundamental mechanics, and attention is needed on current design procedures and for future applications. Standing in the way of a thorough understanding of the time-dependent behavior are the lack of stress relaxation experimental data, and the lack of a robust constitutive model for the reinforcement that will account for both creep and stress relaxation in a rational manner. The major objectives of the research are: 1) to experimentally study stress relaxation of selected geosynthetic reinforcement, 2) to develop a simple constitutive model to realistically simulate the time dependent behavior of the reinforcement, 3) to implement this model into an existing FE computer code, and to verify the predictive capabilities of the model, and 4) to conduct an extensive numerical parametric study of geosynthetically reinforced walls at working stress conditions. The results 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.