大跨径钢桥沥青铺装层裂缝行为研究进展  

Progressof Researches on Fracture Behavior of Long-span Steel Bridge Deck Asphalt Pavement

作　　者：何亮[1] 饶志鹏 凌天清[1] 李冠男[1] HE Liang;RAO Zhi-peng;LING Tian-qing;LI Guan-nan(Engineering Research Center of Bridge Structure and Material in the Mountainous Area Ministry of Education, National and Engineering Laboratory of Traffic Civil Engineering Materials, Chongqing Jiaotong University, Chongqing ,100074,China)

机构地区：[1]重庆交通大学交通土建工程材料国家地方联合工程实验室山区桥梁结构与材料教育部工程研究中心

出　　处：《公路》2018年第7期71-81,共11页Highway

基　　金：英国皇家学会牛顿基金国际交流项目,项目编号IE150750;国家自然科学基金国际合作与交流项目,项目编号51611130189;重庆市基础科学与前沿技术研究专项项目,项目编号cstc2017jcyjAX0076;山区桥梁结构与材料教育部工程研究中心开放基金,项目编号QLGCZX-JJ2016-4

摘　　要：综合国内外最新研究成果,对大跨径钢桥面沥青铺装层的裂缝行为展开了全面的分析,介绍了断裂力学相关理论,基于断裂力学理论采用室内试验与数值模拟手段研究了铺装层疲劳开裂,综述了裂缝行为机理以及裂缝几何因素（缝长、缝深）、铺装体系（铺装层、正交异性板、黏结层）及外界环境（温度、重载及超载、水）对铺装层裂缝行为的影响。研究结果表明,铺装层疲劳裂缝的研究方法主要有三点弯曲梁试验、楔入劈裂试验的室内试验与数值模拟,以及钢桥面铺装层体系足尺3D有限元模拟方法,运用离散元虚拟模型的细观分析方法对裂缝行为机理的研究较室内试验更好,且3D模型效果较2D更优;总体而言,铺装层裂缝扩展速率随裂缝长度、深度的增加而增大,外界荷载的持续作用使铺装层处于更加不利的工作状态,优化铺装体系设计可以延缓铺装层裂缝扩展速率。研究结果可为钢桥面沥青铺装的抗裂设计及后期维修养护工作提供参考依据。Based on the recent research results of the fracture behavior of long-span steel bridge deck asphalt pavement, in the paper the relevant theories of fracture mechanicsare introduced, and the fatigue cracking of pavement is studied by laboratory test and numerical simulation based on the theory of fracture mechanics, the mechanism of fracture behavior and the influences of the geometric factors of the cracks （crack length, crack depth）, pavement system （pavement, orthotropic plate, adhesive layer）, external environment （temperature, overloaded, water） on fracture behavior of pavement are summarized. Research result indicates that the test and numerical simulation of three-point bending beam test, wedge splitting test and, full 3D finite element simulation method of the steel deck pavement system are used for fatigue cracks evaluation of pavement. The meso-analysis method of discrete element virtual model provides effective results compared withlaboratory test, and the 3D model is better than 2D model. In general, the crack propagation rate increases with the increase of length and depth of the crack. Due to the continued effect of external loads, the stability of pavement will be in a more unfavorable working condition, and the crack propagation rate of pavement will be delayedby optimizing pavement system design, which provides reference for the anti - cracking design and post - maintenance and maintenance work of the asphalt pavement.

关 键 词：沥青铺装层裂缝 钢箱梁桥 断裂力学 影响因素 研究进展 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]