A theoretical framework to analyse the behaviour of polymer geosynthetic reinforcement in temperature-accelerated creep tests
A theoretical framework to analyse the behaviour of polymer geosynthetic reinforcement in temperature-accelerated creep tests
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DOI：
10.1680/gein.2007.14.1.23
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发表时间：
2007-02
影响因子：
4.5
通讯作者：
W. Kongkitkul;F. Tatsuoka
中科院分区：
文献类型：
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作者：
W. Kongkitkul;F. Tatsuoka
已经开发出一种非线性三组分模型，该模型能够预测聚合物土工合成材料加筋在实验室和现场所遇到的应变、应变速率和温度的任意历史条件下的强度和变形。对一个现有的假定材料具有弹粘塑性特性的模型框架进行了修改，以考虑环境温度变化对荷载 - 应变关系的影响。通过在固定温度下对长期持续荷载（SL）试验的直接模拟，以及在时间 - 温度叠加（TTS）和分步等温法（SIM）试验中对不同高温下的单调加载和持续加载的模拟，获得了具有典型土工合成材料加筋特性的拉伸荷载 - 应变 - 时间关系。介绍并比较了从这三种数值分析结果中获取主蠕变应变和模量曲线的方法。由……构建的蠕变断裂曲线
A non-linear three-component model has been developed that can predict the strength and deformation of polymer geosynthetic reinforcement when subjected to arbitrary histories of strain, strain rate and temperature as encountered in the laboratory and in the field. An existing model framework assuming the elasto-viscoplastic property of material was modified to account for the effects of changes in ambient temperature on the load-strain relation. Tensile load-strain-time relations for typical geosynthetic reinforcement properties were obtained by direct simulations of long-term sustained loading (SL) tests at a fixed temperature as well as simulations of monotonic loading and sustained loading at different elevated temperatures in time-temperature superposition (TTS) and stepped isothermal method (SIM) tests. The procedures to obtain the master creep strain and modulus curves from the results of these three types of numerical analysis are presented and compared. Creep rupture curves constructed from the m...