期刊论文

Mechanical calculation method and analysis of asphalt pavement considering different modulus in tension and compression

中文

土木工程学报

1000-131X

2020

53

1

110-117

10.15951/j.tmgcxb.2020.01.011

51908071:国家自然科学基金 51708071:国家自然科学基金 18C0194:湖南省教育厅科学研究项目 kjf190301:道路结构与材料交通行业重点实验室(长沙)开放基金

本校为第一机构

现行沥青路面设计理论为传统的线弹性理论,设计时采用抗压回弹模量作为材料刚度参数,并未充分考虑道路材料拉压模量具有显著差异的特点。为此,文章将双模量理论(即拉压模量不同弹性理论)引入到路面力学分析中,基于迭代思想建立考虑材料拉压模量不同的沥青路面结构数值计算方法,且利用ABAQUS二次开发平台UMAT编制计算子程序,对典型沥青路面结构进行力学分析。结果表明:路面关键点位的力学响应,基于双模量理论与传统线弹性理论的计算结果之间的偏差高达30%~ 50%,应引起高度重视;沥青路面表面存在着较大的拉应力和拉应变,应为沥青路面破坏源之一,建议将沥青面层的设计点位从层底移至路表轮隙区;应用...

The current design theory of asphalt pavement is the traditional linear elastic theory,in which the compressive resilient modulus is used as the stiffness parameter of materials in the design without considering the different characteristics of road materials in tension and compression.Therefore,the bimodulus theory(i.e.the elastic theory with different modulus in tension and compression)was introduced into pavement mechanical analysis in this study.Based on the idea of iteration,the numerical calculation method of asphalt pavement structure with different modulus in tension and compression is...