期刊论文

中文

中国公路学报

1001-7372

2020

33

11

148-157

10.19721/j.cnki.1001-7372.2020.11.013

52008044:国家自然科学基金 51878076:国家自然科学基金 2018YFB1600200:科技部重点研发项目

本校为第一机构

粒料的回弹力学特性具有非线性和正交异性.为研究此特性,设计了一种综合考虑粒料应力依赖性和正交异性的动态回弹特性解决方案,该方案包含:改进的重复加载三轴试验方案、正交异性系数α、Uzan应力依赖模型.改进的试验方案包含多个应力水平,每个应力水平上通过施加应力扰动,实现压缩、拉伸和剪切3个应力状态;α表征粒料的正交异性程度,并减少正交异性增量本构方程中的未知数;Uzan三参数应力依赖模型表征模量和泊松比的应力依赖性.推导了增量本构方程,并计算了粒料的5个回弹特性参数:竖向模量、水平向模量、竖平面内泊松比、水平面内泊松比,剪切模量.使用该方案对3种粒料(石灰岩、砾石、花岗岩)进...

The resilient behavior of granular material is nonlinear and cross-anisotropic.A solution accounting for both stress-dependency and cross-anisotropy of the resilient characteristic has been proposed.The solution consists of three parts:an improved repeated load triaxial test(RLTT)program,a cross-anisotropic parameterα,and an Uzan stress-dependent model.The improved RLTT contains several stress levels.By applying stress disturbance at each level,three stress states were achieved:compressive,tensile and shear stress states.αis a measure of anis...