| 交通荷载作用下公路路基动力响应研究 |
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| 引用本文： | 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,2013,0(2):7-10. |
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| 作者姓名： | 王佳 张家生 孟飞 宋良良 |
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| 作者单位： | 中南大学土木工程学院，长沙 410075 |
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| 基金项目： | 国家自然科学基金项目（50908233）;国家工程实验室基金项目（2008G031-Q）;湖南省交通科技项目（200314） |
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| 摘 要： | 针对双向四车道高速公路路基路面结构形式，建立有限元模型，施加三维一致粘弹性人工边界，并基于车辆动力分析理论，对模型施加交通荷载，从而获得了路基的动力响应参数。计算结果表明:标准轴载作用下，路基内3 m深度处，竖向动应力衰减率达80 %以上，路基内竖向动应力的影响深度为3 m左右；路基顶面的竖向动应力随着距车轮外缘距离的增大迅速降低，2 m范围内衰减约90 %，竖向动位移衰减约60 %，交通荷载对路基的影响宽度为6 m左右。
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| 关 键 词： | 交通荷载 动力响应 有限元 公路路基 |
| 收稿时间： | 2019-11-11 |
Study on Dynamic Response of Highway Subgrade under Traffic Loads |
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| Authors: | WANG Jia ZHANG Jiasheng MENG Fei SONG Liangliang |
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| Affiliation: | (School of Civil Engineering, Central South University, Changsha 410075, China) |
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| 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. |
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| Keywords: | traffic loads dynamic response finite element highway subgrade |
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