持续高低温下沥青复合路面温度应力分析  

Analysis on the Temperature Stress of Asphalt Compound Pavement Under the Continuous High and Low Temperature

作　　者：刘沐宇[1] 赵志斌[1] 阮艳彬[2] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点实验室,武汉430070 [2]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《武汉理工大学学报》2010年第10期1-5,共5页Journal of Wuhan University of Technology

基　　金：国家高技术研究发展计划(863计划)项目(2006AA11Z117)

摘　　要：以武汉长江隧道工程为依托,建立了隧道匝道明挖段沥青复合路面结构二维热分析几何模型,分析了在持续高、低温情况下复合路面结构的温度场分布及温度应力变化规律。研究表明:在持续高低温天气条件下沥青复合路面温度逐渐累积,沥青复合材料的应力松弛性难以发挥,路面结构应变能降低,应力急剧增加,沥青下面层最大温度应力可达3 MPa;要求重视隧道沥青复合路面结构设计,并相应提高沥青下面层材料的热稳定性和抗开裂性能。Taking Wuhan Yangtze River Tunnel project as object,the article establish thermal analysis model of asphalt compound pavement in the open excavation tunnel section by two-dimensional geometric finite element method.The paper research the surface temperature distribution and the temperature stress law of compound pavement structure in persistent high or cold weather conditions.Research shows that： the pavement temperature is accumulated gradually in this environment,so the stress-relaxation of asphalt compound material is hard to play,and the strain of pavement structure reduce,the stress dramatically increase,the maximum temperature stress of the below layer asphalt is up to 3 MPa.Calling attention to the tunnel complex asphalt pavement structure design,and corresponding increase the thermal stability and anti-cracking performance of the below layer asphalt mixture.

关 键 词：持续温度 沥青复合路面 热-结构耦合 温度应力 

分 类 号：U416.217[交通运输工程—道路与铁道工程]