路基工程Issue(2)：7-10,14,5.
交通荷载作用下公路路基动力响应研究
Study on Dynamic Response of Highway Subgrade under Traffic Loads
摘要
Abstract
In connection with pavement structure of bidirectional four-lane highway subgrade, a finite element model is established with 3D consistent viscous-spring artificial boundary applied and then, based on vehicle dynamic analysis theory, traffic loads are applied to the model so that the dynamic response parameters could be obtained. The result calculated shows that, under standard axle load, going through 3m in depth, the attenuating rate of vertical dynamic stress is more than 80% , the depth inside the subgrade being affected by vertical dynamic stress is about 3m; the vertical dynamic stress on the subgrade surface decreases rapidly with the increase of distance to the felloe, within the range of 2m, the decrement is about 90% , and the decrement of vertical displacement is about 60% . The width on the subgrade being affected by traffic loads is about 6m.关键词
交通荷载/动力响应/有限元/公路路基Key words
traffic loads/ dynamic response/ finite element/ highway subgrade分类
建筑与水利引用本文复制引用
王佳,张家生,孟飞,宋良良..交通荷载作用下公路路基动力响应研究[J].路基工程,2013,(2):7-10,14,5.基金项目
国家自然科学基金项目(50908233) （50908233）
国家工程实验室基金项目(2008G031-Q) （2008G031-Q）
湖南省交通科技项目(200314) （200314）
