车辆超载对公路使用寿命的影响

张韡; 张宜民; 魏朗; 段翔; 陈加宏

doi:10.19818/j.cnki.1671-1637.2012.06.013

车辆超载对公路使用寿命的影响

doi: 10.19818/j.cnki.1671-1637.2012.06.013

1.
长安大学汽车运输安全保障技术交通行业重点实验室，陕西西安 710064
2.
长安大学汽车学院，陕西西安 710064
3.
云南交通咨询有限公司，云南昆明 650031

基金项目:

"十一五" 国家科技支撑计划项目 2009BAG13A07

中央高校基本科研业务费专项资金项目 CHD2012JC061

详细信息

作者简介:
张韡(1973-), 男, 陕西佳县人, 长安大学副教授, 工学博士, 从事道路交通安全研究

中图分类号: U491.12
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- 被引次数: 0
出版历程
- 收稿日期: 2012-07-24
- 刊出日期: 2012-12-25

Influence of vehicle overloading on service life of highway

1.
Key Laboratory for Automotive Transportation Safety Technology of Ministry of Transport, Chang' an University, Xi'an 710064, Shaanxi, China
2.
School of Automobile, Chang'an University, Xi'an 710064, Shaanxi, China
3.
Yunnan Traffic Consulting Co., Ltd., Kunming 650031, Yunnan, China

More Information

Author Bio:
ZHANG Wei(1973-), male, associate professor, PhD, +86-29-82334367, zhweijx@chd.edu.cn

摘要

摘要: 分析了轴载与公路使用寿命的关系, 根据路面不平度的频域模型和时域模型, 建立了4自由度车辆动力学模型。利用Mathcad软件进行数值仿真计算, 获得不同工况下车辆前后轮的最大动载荷, 分析了车轮动载荷与车速、车轮载荷与超载、轮荷冲击系数与超载之间的关系, 并预测了不同载荷条件下公路的实际使用寿命。研究结果表明: 车轮动载荷和轮荷冲击系数与车速成线性增大关系, 当车速由10km·h^-1增大到100km·h^-1时, 车轮动载荷增大2.5~3.1倍, 轮荷冲击系数增大17%~20%;超载降低了车辆的轮荷冲击系数, 但使得车轮的实际最大载荷大幅增大; 在超载100%的情况下, 当以沥青层层底拉应力为设计指标时, 公路实际使用寿命下降96%, 当以半刚性材料层层底拉应力为设计指标时, 公路实际使用寿命下降99%。
- 公路使用寿命 /
- 路面不平度 /
- 超载 /
- 车轮载荷 /
- 动载荷 /
- 轴载
Abstract: The relationship between axle load and the service life of highway was analyzed. Based on the frequency domain model and time domain model of pavement roughness, vehicle dynamics model with four degrees of freedom was set up. Numerical simulation calculation was carried out by using Mathcad software, and the maximum dynamic loads of front and rear wheels under different conditions were obtained. The relationships among wheel dynamic load and vehicle velocity, wheel load and overloading, wheel load impact factor and overloading were analyzed respectively, the actual service lifes of highway under different conditions were forecasted. Analysis result shows that there are linear increasing relationships between wheel dynamic load and vehicle velocity, wheel load impact factor and vehicle velocity. When vehicle velocity increases from 10 km·h^-1 to 100 km·h^-1, wheel dynamic load increases by 2.5-3.1 times, and wheel load impact factor increases by 17%-20%. Overloading decreases wheel load impact factor, but increases the real maximum wheel load greatly. Under the condition of overloading 100%, the actual service life of highway will decrease by 96% while the bottom layer tensile stress of asphalt layer is taken as design index, and the actual service life of highway will decrease by 99% while the bottom layer tensile stress of semi-rigid material layer is taken as design index.
- service life of highway /
- pavement roughness /
- overloading /
- wheel load /
- dynamic load /
- axle load

HTML全文

图 1 路面不平度仿真结果

Figure 1. Simulation result of road roughness

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图 2 车辆振动模型

Figure 2. Vehicle vibration model

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图 3 前轮动载荷

Figure 3. Dynamic loads of front wheel

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图 4 后轮动载荷

Figure 4. Dynamic loads of rear wheel

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图 5 车轮载荷与超载的关系

Figure 5. Relationship between wheel load and overloading

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图 6 前轮轮荷冲击系数

Figure 6. Wheel load impact factors of front wheel

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图 7 后轮轮荷冲击系数

Figure 7. Wheel load impact factors of rear wheel

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图 8 超载与轮荷冲击系数的关系

Figure 8. Fig 8 Relationship between overloading and wheel load impact factor

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图 9 基于沥青层层底拉应力的实际使用寿命

Figure 9. Actual service lives based on bottom layer tensile stress of asphalt layer

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图 10 基于半刚性材料层层底拉应力的实际使用寿命

Figure 10. Actual service lives based on bottom layer tensile stress of semi-rigid material layer

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