Advanced Characterization and Predictive Models of Deformation Behavior of Pavement and Railroad Track Foundation Geomaterials under Moving Wheel Loads

肖源杰 副教授/博导

主讲人：肖源杰 副教授/博导

邀请人：钱劲松 副教授

时间：2018年5月29日（周二）9:00—11:00

地点：交通运输工程学院103会议室

主讲人简介

  肖源杰博士分别获同济大学学士学位、东南大学硕士学位和美国伊利诺伊大学香槟分校(UIUC)硕士及博士学位。现任中南大学土木工程学院岩土工程系副教授、博士生导师，是"2011计划"轨道交通安全协同创新中心"轨道交通工程结构经时行为理论与性能提升技术"、"轨道-路基动力及岩土力学系统"和“重载铁路工程结构”等创新团队学术骨干。先后主持和承担了国家重点研发计划、国家自然科学基金高铁联合基金、面上项目和青年基金、湖南省自然科学基金以及中国铁路总公司和中交三公局科技开发计划等科研项目多项，累计发表SCI和EI收录论文四十余篇，出版学术专著1部，曾获美国TRB最佳论文奖等奖项。研究领域主要包括交通岩土工程、路基动力学分析、散粒体材料试验和数值模拟等。

主讲内容简介

The primary function of pavement and railroad track foundation layers is to distribute wheel loads and provide adequate protection of the subgrade. Advanced characterization and accurate prediction of the mechanical behavior of such foundation geomaterials under moving wheel loads are indispensable for achieving cost-effective design and longevity. This talk will present recent research efforts devoted to develop a customized, large-scale laboratory triaxial apparatus capable of simulating the moving wheel loads and conduct a series of advanced cyclic triaxial tests. The laboratory loading schemes involved different stress paths with both constant and variable confining pressures. The cyclic plastic deformation behavior of such UGMs subjected to stress paths induced by moving wheel loads were investigated. Mechanistic models capable of predicting the observed stress-path-dependent deformation behavior were further developed. The findings are useful for estimating permanent deformation behavior of unbound granular materials subjected to moving wheel loads and realistically assessing their suitability in pavement and railroad track foundation layers.

数据驱动的路面养护与管理