沥青混合料的黏弹性疲劳损伤模型研究  

VISCOELASTIC FATIGUE DAMAGE MODEL OF BITUMINOUS MIXTURE

作　　者：关宏信[1] 郑健龙[1] 张起森[1] 

机构地区：[1]长沙理工大学公路工程学院,长沙410076

出　　处：《力学与实践》2007年第2期50-53,共4页Mechanics in Engineering

基　　金：国家自然科学基金项目资助(50178012).

摘　　要：从沥青混合料的黏弹性本构模型出发,按应变等效假设将损伤引进本构模型,推导周期应力条件下含损伤的耗散能表达式,进而得到黏弹性损伤演化方程和疲劳方程;该模型可以综合反映应力、加载频率和温度的影响,适合用来分析沥青路面的疲劳损伤问题;利用MTS开展了沥青混合料的疲劳损伤试验,确定了相应的黏弹性疲劳损伤模型参数,据此开展了模型验证,结果表明模型与实测值之间相关性很好．In this paper, the ＂strain equivalent assumption＂ is introduced into the viscoelastic constitutive model of bituminous mixture and the dissipation energy expression with damage, the viscoelastic damage evolution law and the fatigue function under cycling loading are deduced. The viscoelatic fatigue damage model consists of three factors： stress, frequency and temperature. A qualitative analysis indicates that the viscoelatic fatigue damage model can be applied to analyze fatigue damage of asphalt pavement. Laboratory fatigue tests of bituminous mixture at different stresses, frequencies and temperatures are carried out on MTS to obtain the parameters of viscoelatic fatigue damage model and the viscoelatic fatigue damage model is verified.

关 键 词：沥青混合料 黏弹性 疲劳损伤 模型 试验 

分 类 号：U416.217[交通运输工程—道路与铁道工程]