[1]陈静云,孙依人,刘佳音,等.沥青路面黏弹性泊松比近似方法的比较[J].东南大学学报(自然科学版),2013,43(4):868-872.[doi:10.3969/j.issn.1001-0505.2013.04.036]
　Chen Jingyun,Sun Yiren,Liu Jiayin,et al.Comparison of approximate methods of viscoelastic Poissons ratio for asphalt pavements[J].Journal of Southeast University (Natural Science Edition),2013,43(4):868-872.[doi:10.3969/j.issn.1001-0505.2013.04.036]
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沥青路面黏弹性泊松比近似方法的比较()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第4期
页码:
868-872
栏目:
交通运输工程
出版日期:
2013-07-20

文章信息/Info

Title:
Comparison of approximate methods of viscoelastic Poissons ratio for asphalt pavements
作者:
陈静云; 孙依人; 刘佳音; 徐辉
大连理工大学交通运输学院, 大连 116024
Author(s):
Chen Jingyun;  Sun Yiren;  Liu Jiayin;  Xu Hui
School of Transportation and Logistics, Dalian University of Technology, Dalian 116024, China
关键词:
黏弹性;  泊松比;  沥青路面;  有限元法;  车辙
Keywords:
viscoelasticity;  Poissons ratio;  asphalt pavement;  finite element method;  rutting
分类号:
U416.217
DOI:
10.3969/j.issn.1001-0505.2013.04.036
摘要:
为了准确应用黏弹性泊松比分析沥青路面在车轮荷载作用下的动态响应,针对3种常用的黏弹性泊松比近似方法进行了比较研究.推导了这3种黏弹性泊松比(随时间变化泊松比、不可压缩泊松比和常数泊松比)的数值关系,进而建立了一种三维沥青路面黏弹性有限元模型,比较分析了不同温度、不同加载时间下,3种黏弹性泊松比近似方法对沥青路面横向正应力响应的影响.结果表明:不可压缩泊松比始终保持为0.5,适用于高温、低频加载条件;常数泊松比始终保持为0.1,适用于低温、高频加载条件;随时间变化泊松比在0.1~0.5之间变化,应用不受温度与加载模式的限制.采用正确的黏弹性泊松比近似方法对于流动性车辙的研究有重要意义.
Abstract:
In order to accurately employ the viscoelastic Poissons ratio for dynamic response analysis of asphalt pavements under wheel loading, three common approximate methods of viscoelastic Poissons ratio were comparatively studied. The numerical relationships among the three viscoelastic Poissons ratios, the time-dependent Poissons ratio, the incompressible Poissons ratio and the constant Poissons ratio, were proposed. Then, a three-dimensional viscoelastic finite element model of an asphalt pavement was derived. The influences of these three approximations of viscoelastic Poissons ratio on the transverse normal stresses of the asphalt pavement were compared under different temperatures and durations of load. The results show that the incompressible Poissons ratio always keeps at 0.5, which is applicable for high temperature and low frequency loading; the constant Poissons ratio always keeps at 0.1, which is suitable for low temperature and high frequency loading; the time-dependent Poissons ratio varies between 0.1 to 0.5, whose application is unconstrained by temperatures and loading modes. The application of correct approximation of viscoelastic Poissons ratio bears important implications for researches of flow rutting.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 陈静云(1956—),女,博士,教授,博士生导师,chenjy@dlut.edu.cn.
基金项目: 国家自然科学基金资助项目(50578031).
引文格式: 陈静云,孙依人,刘佳音,等.沥青路面黏弹性泊松比近似方法的比较［J］.东南大学学报:自然科学版,2013,43(4):868-872. ［doi:10.3969/j.issn.1001-0505.2013.04.036］
更新日期/Last Update: 2013-07-20