基于有限元的土工格栅界面特性各向异性分析  

Anisotropic Analysis of Interface Characteristics of Geogrids Based on FEM

作　　者：李洋[1] 张军[1] 贾磊[1] 刘晓[1] 赵建斌[1] 薛春明[1] 孙贝[1] 

机构地区：[1]山西省交通科学研究院,山西太原030006

出　　处：《筑路机械与施工机械化》2016年第3期41-44,共4页Road Machinery & Construction Mechanization

基　　金：山西省科技厅自然科学基金(2014021033-1)

摘　　要：通过建立土工格栅直剪过程有限元模型,分析了双向格栅和单向格栅力学性能的各向异性,证明剪切角度对双向格栅的剪应力峰值没有影响。对比了单向格栅在不同法向压力和剪切速度下剪应力峰值的变化趋势,发现随着法向压力的增大和剪切速度的提高,剪切角度为45°的剪应力峰值与0°的剪应力峰值之差随之增加。Numerical simulation on geogridsk＇ direct shear process was conducted,and the biaxial and uniaxial geogrids＇ mechanical properties of anisotropy were analyzed.The peak value of shear stress of the biaxial geogrids showed little effect on the shear angle.Numerical simulation of uniaxial geogrids＇ shearing process in different directions was carried out,and the variation trends of peak value of shear stress at different normal stress and shear velocity were analyzed.With the increase of normal pressure and shear velocity,the difference of the peak value of shear stress at shear angles of 45° and 0° is increased.

关 键 词：土工格栅 界面特性 数值模拟 剪应力峰值 

分 类 号：U416.1[交通运输工程—道路与铁道工程]