塑料土工格栅蠕变性能的加速表征  

Accelerated Characterization of Creep Behavior of Plastic Geogrids

作　　者：罗文隽 

机构地区：[1]湘潭市规划建筑设计院,湘潭411100

出　　处：《武汉理工大学学报（交通科学与工程版）》2006年第2期282-284,335,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目(批准号:10572123);湖南省自然科学基金资助项目(批准号:05JJ30014);教育部重点实验室开放课题资助(批准号:KF0502)

摘　　要：运用蠕变系数法和时间-应力等效原理分析塑料土工格栅的蠕变行为.运用时间-应力等效原理,可以由较高应力水平下较短时间的试验数据,通过沿时间轴的平移得到较低应力水平下材料的长期性能.计算结果表明,蠕变系数法和应力移位方法所得结果吻合良好.时间-应力等效原理适用于对塑料土工格栅长期蠕变性能进行加速表征.The Creep coefficient method and the time-stress equivalence principle are used to investigate the creep behavior of plastic geogrids. According to the time-stress equivalence principle, the creep compliance vs, time curves at five different stress levels are determined and shifted along logarithmic time axis to get a master compliance curve at a given reference stress level. It is shown that the predictions made by creep coefficient method and the stress shift technique are agree well with each other. Thus the time-stress equivalence principle provides an accelerated characterization technique to evaluate the long-term creep properties of plastic geogrids.

关 键 词：土工格栅 蠕变 时间-应力等效原理 

分 类 号：TU381[建筑科学—结构工程]