沥青路面动态响应数值分析

罗辉; 朱宏平; 郝行舟

沥青路面动态响应数值分析

罗辉^1,,
朱宏平^{1, 2},
郝行舟¹

1.
华中科技大学土木工程与力学学院, 湖北武汉 430074
2.
华中科技大学控制结构湖北省重点实验室, 湖北武汉 430074

基金项目:

国家自然科学基金项目 10672063

教育部新世纪优秀人才支持计划项目 NCET-04-0720

武汉市建设科研计划项目 2006-39

详细信息

作者简介:
罗辉(1979-), 男, 湖北武汉人, 华中科技大学工学博士, 从事道路结构行为及理论研究

中图分类号: U416.01
计量
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- HTML全文浏览量: 91
- PDF下载量: 218
- 被引次数: 0
出版历程
- 收稿日期: 2007-02-12
- 刊出日期: 2007-08-25

Numerical analysis of dynamic response on asphalt pavement

1.
School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
2.
Hubei Key Laboratory of Control Structure, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China

More Information

Author Bio:
Luo Hui (1979-), male, EngD, +86-27-87556774, luohui@smail.hust.edu.cn

摘要

摘要: 为了优化沥青路面结构设计, 引入无反射边界, 依据结构动力理论, 利用有限元数值分析方法, 对多层沥青路面在移动荷载作用下的动态响应进行了分析。发现沥青面层的拉应力和路表弯沉随着基层模量、层间摩擦系数、行车速度和面层材料阻尼的增大而减小, 剪切应力随着轮胎接地压力和基层模量的增大而增大。分析结果表明: 基层设计需要综合优化设计, 简单增加基层模量和厚度都是不合适的; 良好的层间接触状态以及使用较大阻尼的材料, 有利于路面性能的改善; 提高行车速度可以延长路面的使用寿命。
- 路面工程 /
- 动力分析 /
- 无反射边界 /
- 粘弹性 /
- 层间接触状态
Abstract: In order to optimize the structural design of asphalt pavement, non-reflective boundary was introduced, structural dynamics theory was adopted, its dynamic responses under moving loads were analyzed by using finite element method. It is pointed that tensile stress and surface deflection decrease with the increases of base course modulus, friction coefficient, vehicle velocity and surface course damping, but the shear stress ascends with the raises of tire pressure and base course modulus. Analysis result shows that it is not appropriate to simply increase base course modulus and thickness, the base design should be optimized synthetically; good contacting condition and great damping material lead to fine pavement performance; the velocity increase of vehicle can extend pavement service life.
- pavement engineering /
- dynamic analysis /
- non-reflective boundary /
- viscoelasticity /
- contacting condition between interfaces

HTML全文

图 1 不同边界的位移

Figure 1. Displacements of different boundaries

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图 2 路面结构

Figure 2. Pavement structure

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图 3 动态荷载

Figure 3. Dynamic load

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图 4 时间历程响应

Figure 4. Response of time history

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图 5 基层模量的影响

Figure 5. Influence of base modulus

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图 6 基层厚度的影响

Figure 6. Influence of base thickness

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图 7 接触状态的影响

Figure 7. Influence of contacting condition

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图 8 阻尼的影响

Figure 8. Influence of damping

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图 9 行车速度的影响

Figure 9. Influence of vehicle velocity

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图 10 轮胎接地压力的影响

Figure 10. Influence of tire pressure

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表 1 结构参数

Table 1. Structure parameters

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表 2 沥青面层的材料参数

Table 2. Material parameters of asphalt surface course

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