[1]吴旷怀,杨国良,张肖宁.考虑松弛的沥青混合料疲劳损伤累计模型研究[J].深圳大学学报理工版,2008,25(4):345-350.
　WU Kuang-huai,YANG Guo-liang,and ZHANG Xiao-ning.A fatigue damage model of asphalt mixture considering stress relaxation[J].Journal of Shenzhen University Science and Engineering,2008,25(4):345-350.
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考虑松弛的沥青混合料疲劳损伤累计模型研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第25卷
期数:
2008年4期
页码:
345-350
栏目:
材料科学
出版日期:
2008-10-31

文章信息/Info

Title:
A fatigue damage model of asphalt mixture considering stress relaxation
文章编号:
1000-2618(2008)04-0345-06
作者:
吴旷怀1; 杨国良1; 张肖宁2
1)广州大学土木工程学院，广州 510006
2)华南理工大学交通学院，广州 510640
Author(s):
WU Kuang-huai1; YANG Guo-liang1; and ZHANG Xiao-ning2
1)College of Civil Engineering，Guangzhou University，Guangzhou 510006，P．R．China
2)Institute of Road Engineering，South China University of Technology，Guangzhou 510640，P．R．China
关键词:
沥青混合料; 应变控制; 应力松弛; 损伤模型
Keywords:
asphalt mixture; strain-control; stress relaxation; fatigue model
分类号:
U 416.217；U 414
文献标志码:
A
摘要:
根据应变控制疲劳试验的受力特点，通过分解沥青混合料应变，控制疲劳试验输入和输出响应，分析沥青混合料应变控制疲劳试验过程中的松弛现象．基于损伤力学和粘弹理论，分析由应力松弛引起的疲劳损伤和演化规律，建立考虑应力松弛沥青混合料疲劳损伤累计模型．相同条件下一组大样本疲劳试验结果与模型计算结果的对比表明，提出的损伤演化模型不仅拟合效果良好，且揭示沥青混合料在重复载荷作用下初期模量衰减的粘弹非线性本质，有利于沥青混合料疲劳研究和寿命预测．
Abstract:
The cycled strain input and stress output were analyzed with the loading characteristic of the strain-control fatigue test．It was found that there was stress relaxation during the test of asphalt mixture．Based on the damage mechanics and viscoelastic theory，with the analysis of fatigue damage caused by stress relaxation and the law of evolution，a nonlinear mathematical model for evolution of fatigue damage of asphalt mixture was proposed．A comparison with the results of a set of large sample fatigue tests shows that the proposed damage evolution model not only has good fitting effect，but also discloses the nonlinear nature of viscoelasticity of asphalt mixture with initial modulus attenuation under repeated load．This has a certain theoretic significance in researches on fatigue of asphalt mixture and the prediction of fatigue life．

参考文献/References:

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［1］Didier Bodin，Gilles Pijaudier-Cabot，Chantal de La Roche．Continuum damage approach to asphalt concrete fatigue modeling［J］．Journal of Engineering Mechanics，2004(6)：700-708．
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［6］GUAN Hong-xin，ZHENG Jian-long，ZHANG Qi-sen．Viscoelastic fatigue damage model of bituminous mixture［J］．Mechanics in Engineering，2007，29(2)：50-53 (in Chinese)．
［7］HUANG Wei，DEN Xue-jun，Monismith C L．Fatigue equation of asphalt mixtures based on dissipated energy ［J］．China Journal of Highway and Transport，1995，8(1)：56-62 (in Chinese)．
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备注/Memo

备注/Memo:
收稿日期：2007-10-22；修回日期：2008-03-26
基金项目：国家西部交通建设科技资助项目（200431800004）
作者简介：吴旷怀(1969-)，男（汉族），湖南省桃江县人，广州大学副教授、博士．E-mail：wukuanghuai@163.com
更新日期/Last Update: 2008-11-26