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超载对半刚性基层沥青路面应力的影响
发表时间：2008-01-31 浏览量：2395 下载量：886
| 全部作者： | 尹祖超，彭广银 |
| 作者单位： | 东南大学交通学院 |
| 摘 要： | 随着我国高速公路的建设，超载现象也变得越来越严重。本文分析了超载对沥青路面结构应力的影响，分别计算了不同轴重情况下应力分布情况。计算表明，超载对路面结构中性点（即正应力为零的点）的位置及表层σy拉应力区范围影响不大，但使面层剪应力，层底弯拉应力以及路基顶压应力显著增大，可见超载对路面破坏的严重性。超载情况下，各结构层模量及厚度对中性点位置以及各应力影响较复杂，程度不一。因此，路面设计应综合考虑各个设计指标，不能一味地优化某一指标。 |
| 关 键 词： | 道路工程；应力分析；中性点；半刚性基层沥青路面; 超载 |
| Title： | Influence of overloading on stress in asphalt pavement with semi-rigid base course |
| Author： | YIN Zuchao, PENG Guangyin |
| Organization： | Department of Transportation, Southeast University |
| Abstract： | The phenomenon of overloading is severer and severer along with the construction of highway in our country. Influence of overloading on asphalt pavement is discussed in the article, and also stressed distribution under different axle loads. It can be seen from the calculation that, the impact of overloading on neutral point whose normal stress is zero and tensile stress district on surface is minor. But overloading makes shear stress on surface, flexural-tensile stress at subbase course and compressive stress on top of subgrade increase remarkably. So it can discern the severity of overloading on pavement failure. Under overloading, the modulus and thickness of each course affect neutral point and each stress differently. So, each design index should be taken into account in pavement design, and we cannot optimize some fixed index blindly. |
| Key words： | road engineering; stress analysis; neutral point; asphalt pavement with semi-rigid base course; overloading |
| 发表期数： | 2008年5月第2期 |
| 引用格式： | 尹祖超，彭广银. 超载对半刚性基层沥青路面应力的影响[J]. 中国科技论文在线精品论文，2008，1（2）：224-229. |
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