| 路面不平度对低路堤动应力的影响研究 |
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| 引用本文： | 刘大鹏,李薇,王婧,刘梦溪.路面不平度对低路堤动应力的影响研究[J].路基工程,2023,0(1):93-98. |
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| 作者姓名： | 刘大鹏 李薇 王婧 刘梦溪 |
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| 作者单位： | 1.江苏建筑职业技术学院，江苏徐州 221116 |
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| 基金项目： | 江苏省高等学校自然科学研究重大项目（18KJA560001）；江苏省住建厅科技项目（2016ZD081）；江苏省青蓝工程资助 |
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| 摘 要： | 基于正弦函数变化的路面不平度和两自由度的四分之一车辆模型，推导出车辆随机动荷载计算公式，研究路面不平度对车辆荷载作用下低路堤动力响应的影响规律。建立车-路耦合三维动力有限元模型，计算分析6种工况下不同路面不平度时车辆随机动荷载作用下低路堤的动应力，得出低路堤动应力均随路面不平度值的增加而增大，且与车辆附加动荷载系数m近似为线性关系；提出不同路面不平度时车辆随机动荷载作用下低路堤动应力计算模型，并对比有限元模型得到的低路堤动应力与应力计算模型得到的低路堤动应力。
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| 关 键 词： | 低路堤 路面不平度 随机动荷载 动应力 应力计算模型 |
| 收稿时间： | 2022-11-09 |
Study on the Influence of Pavement Roughness on Dynamic Response of Low Embankment |
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| Abstract: | The calculation formula of vehicle random dynamic load is derived based on the sine function variation of road roughness and the quarter vehicle model with two degrees of freedom. The influence of road roughness on the dynamic response of low embankment under vehicle load is studied, In this paper, the vehicle road coupling 3D dynamic finite element model is established. The dynamic stress of low embankment under the action of vehicle random dynamic load under 6 working conditions with different road roughness is calculated by using the vehicle road coupling 3D dynamic finite element model. It is concluded that the dynamic stress of low embankment increases with the increase of road roughness value, and is approximately linear with the vehicle additional dynamic load coefficient. A calculation model of dynamic stress of low embankment under the action of random dynamic load of vehicles under different road roughness is proposed. It's compared that the low embankment dynamic stress obtained from the finite element model with the low embankment dynamic stress obtained from the stress calculation model. |
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