青藏公路沥青路面结构温度应力影响因素分析  

Analysis of influence factor on thermal stress of asphalt pavement structure on Qinghai-Tibet highway

作　　者：王磊 胡浩[2] 马骉[2] 褚凯[2] 

机构地区：[1]长安大学工程设计研究院,陕西西安710064 [2]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2010年第4期28-33,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200631800009);中交寒区道路工程重点实验室开放基金资助项目(HSKF2007-04)

摘　　要：针对青藏公路沿线常年低温、昼夜温差大等气候特点,利用ANSYS大型有限元分析软件,在温度场研究的基础上,计算分析了面层厚度、面层模量、面层线膨胀系数及不同气温状况对温度应力的影响。结果表明:随着面层厚度的增加,沥青混凝土路面面层底面的温度应力变化幅度最大;面层弹性模量对路面结构层温度应力的影响较大,但其影响深度有限;沥青路面结构层温度应力随着面层线膨胀系数的减小而减小,温度越低,其影响越大;温度越低,温差越大,沥青路面结构层的温度应力越大。Aiming at the climate feature of low temperature and large temperature difference on Qinghai-Tibet highway,this paper analyzed the influence of pavement thickness,elastic module,linear expansion coefficient and temperature on the thermal stress based on the study of temperature field by using ANSYS finite element analysis software.The results show that,with the increasing of pavement thickness,the thermal stress at the bottom of pavement has the largest changes.The influence of pavement elastic module to the thermal stress in asphalt pavement may be great,but only in the definite deep.The thermal stress in asphalt pavement decreases with the decreasing of pavement linear expansion coefficient,the lower the temperature,the larger the influence is.The thermal stress in asphalt pavement increases when the temperature is lower and the temperature difference is larger.3 tabs,12 figs,13 refs.

关 键 词：道路工程 青藏公路 沥青路面 温度应力 影响因素 

分 类 号：U416.217[交通运输工程—道路与铁道工程]