摘要
文章通过开展高密度聚乙烯土工格栅的拉伸强度试验和拉伸蠕变试验,比较张力水平大小对其拉伸蠕变的影响,并对不同类型土工格栅拉伸蠕变模型进行回归求解,以提出适用于高密度聚乙烯土工格栅拉伸蠕变的模型。结果表明,与普通土工格栅相比,高密度聚乙烯土工格栅具有很强的抗破坏和抗变形能力;所用的经验型蠕变模型和三参数粘弹性本构模型适用于反映低张力水平情况时的土工格栅蠕变行为;幂函数、双曲线函数、对数函数等三类经验型蠕变模型中幂函数型蠕变模型拟合土工格栅蠕变试验数据的精度最高。
Through the tensile strength test and tensile creep test of high-density polyethylene geogrid,this article compared the influence of tension level on its tensile creep,and conducted the regression solving on the tensile creep model of different types of geogrids,in order to propose the model suitable for the tensile creep of high-density polyethylene geogrid.The results showed that,compared to the common geogrid,high-density polyethylene geogrid has a strong anti-sabotage and anti-deformation ability;the empirical creep modeland three-parameter viscoelastic constitutive modelbeing adoptedare applicable to reflect thegeogrid creep behaviorunder low tension situation;among three empirical creep models of power function,hyperbolic functions,and logarithmic functions,the power function creep model has highest fitting accuracy with geogrids creep experiment data.
出处
《西部交通科技》
2016年第4期1-5,9,共6页
Western China Communications Science & Technology
基金
江西交通科技计划项目"生态型土工格栅加筋土挡墙关键技术研究"(2015C0006)
关键词
土工格栅
拉伸试验
蠕变特性
本构模型
拉伸强度
Geogrid
Tensile test
Creep characteristics
Constitutive model
Tensile strength
