机场刚性道面接缝传荷能力的评价  

Evaluation of Load Transfer Efficiency at Joints for Rigid Airport Pavement

作　　者：周正峰[1] 凌建明[2] 袁捷[2] 林小平[3] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]同济大学道路与交通工程教育部重点实验室,上海201804 [3]交通部科学研究院,北京100029

出　　处：《同济大学学报（自然科学版）》2010年第6期844-849,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金委员会与中国民用航空总局联合资助项目(60776818);中央高校基本科研业务费专项资金资助项目(SWJTU09BR12);西南交通大学青年教师科研起步资助项目(2009Q075)

摘　　要：基于ABAQUS有限元软件,按照"贡献面积"刚度分配原则,通过在相邻混凝土板侧面的对应结点设置弹簧单元,建立了考虑接缝传荷能力的机场刚性道面3维有限元分析模型.以重型落锤式弯沉仪(HWD)弯沉测试为基础,针对不同地基强度上的典型道面结构,考虑基层对接缝传荷能力的影响,应用有限元模型,分析了HWD承载板、单轴双轮起落架、双轴双轮起落架和三轴双轮起落架等荷载形式作用在接缝一侧板边中部时道面结构的板边应力和挠度,建立了HWD承载板测试得到的挠度传荷系数与接缝刚度之间的相关关系,以及与不同荷载形式作用的应力折减系数之间的相关关系,成果可用于评价机场刚性道面的接缝传荷能力,以及道面板边应力分析.Based on ABAQUS software,a comprehensive 3D finite element model to analyze the structrual response of jointed rigid airport pavement was established by distributing the stiffness to the nodes along the joint using the concept of contributing areas.Bending stress and deflection for typical pavement structure with varying subgrade strength and joint stiffness on edge loading case were calculated under various landing assemblies.Considering the effect of base course on the load transfer efficiency at joints,a new relationship between the deflection load transfer efficiency obtained from Heavy Weight Deflectometer（HWD） and joint stiffness is established,and relationships between the deflection load transfer efficiencies and the stress load transfer efficiencies subjected to various landing assemblies are established as well.The results provide an approach to evaluate load transfer efficiency at joints and analyze bending stress at slab edge.

关 键 词：机场 刚性道面 接缝 传荷能力 评价 3维有限元 重型落锤式弯沉仪(HWD) 

分 类 号：U416.216[交通运输工程—道路与铁道工程]