半刚性基层路表结构设计及疲劳寿命验算  

Semi-rigid base pavement structure design and fatigue life checking

作　　者：王志龙 赵志坤 Wang Zhilong;Zhao Zhikun(Qingyuan Comprehensive Service Station for Constraction Engineering,Qingyuan Guangdong 513099,China;Shenzhen Craftsmanship Construction Co.,Ltd.,Shenzhen Guangdong 518131,China)

机构地区：[1]清远市建设工程综合服务站,广东清远513099 [2]深圳市匠心建设有限公司,广东深圳518131

出　　处：《山西建筑》2024年第23期153-157,共5页Shanxi Architecture

基　　金：国家自然科学基金:华南典型红色问题土崩解演化过程中粒间吸力力链的时变规律研究(批准号:42102303)。

摘　　要：借助Abaqus软件,对半刚性基层沥青路面结构在不同工况及层间接触状态下的力学响应特性进行了深入分析。研究发现,竖向荷载、通量以及重车比例对结构的寿命具有显著影响,而水平荷载的增加则易于导致层间发生剪切破坏。此外,文章着重分析了三种不同结构层间接触状态的劣化性能演变,结果表明,层间接触的黏结能力对于结构的力学性能具有至关重要的作用。在此基础上,进一步探讨了环氧沥青结构和倒装结构的疲劳特性参数敏感性排序,并成功揭示了结构在不同荷载工况下的力学演变规律。即环氧+应力吸收层和环氧+倒装结构在标准荷载下展现出较为优异的性能,而在重载条件下,则推荐使用面层较厚的环氧+半刚性基层结构。同时,层间接触状态的变化对结构的力学性能具有显著影响,层间黏结性越好,结构越不易发生破坏。This paper employs Abaqus software to conduct an in-depth analysis of the mechanical response characteristics of semi-rigid base asphalt pavement structures under various working conditions and interlayer contact states.The study reveals that vertical loads,traffic volume,and the proportion of heavy vehicles have significant impacts on the structural lifespan,while an increase in horizontal loads is prone to inducing interlayer shear failure.Furthermore,this paper focuses on analyzing the deterioration performance evolution of three different structural interlayer contact states.The results indicate that the bonding capacity of interlayer contacts plays a crucial role in the mechanical properties of the structure.Based on this,the paper further explores the sensitivity ranking of fatigue characteristic parameters for epoxy asphalt structures and inverted structures,successfully uncovering the mechanical evolution laws of the structure under different load conditions.Specifically,the epoxy+stress-absorbing layer and epoxy+inverted structures exhibit superior performance under standard loads,while the use of thicker surface-layer epoxy+semi-rigid base structures is recommended under heavy-load conditions.Simultaneously,changes in interlayer contact states have a significant influence on the mechanical properties of the structure,with better interlayer bonding leading to increased structural resistance to damage.

关 键 词：有限元分析 半刚性基层路面 不同工况 疲劳验算 

分 类 号：TU997[建筑科学—市政工程] U416.2[交通运输工程—道路与铁道工程]