基面层间接触状态对沥青路面力学响应影响  

Impact of base-surface contact conditions on mechanical response of asphalt pavement

作　　者：李彦伟[1,2] 穆柯[3,4] 石鑫[2] 王选仓[4] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]石家庄市交通运输局,河北石家庄050051 [3]中交第一公路勘察设计研究院有限公司,陕西西安710068 [4]长安大学公路学院,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2014年第2期38-44,共7页Journal of Chang’an University(Natural Science Edition)

基　　金：国家重点基础研究发展计划项目(2012CB026100);中交集团科技研发项目(2011-ZJKJ-16)

摘　　要：为了研究沥青路面基面层间结合状态对其使用性能的影响,分析了不同层间粘结状况下路面力学响应状况,建立了基于脱层失效理论的基面层间有限元模型,采用子结构分析方法系统研究了精铣刨、胶粉改性沥青、SBS改性沥青、基质沥青等不同层间处治措施对路用性能的影响,并通过室内层间直剪试验对预估模型进行了验证。研究结果表明:与传统定义层间摩擦因数的方法相比,脱层失效理论的层间接触模型更能有效反映不同层间材料、不同粘结层厚度对路面力学性能的影响,并能分析随轮载加重而造成的层间材料刚度损失;在面层厚度较薄、水平力系数较大、超载严重的路段采用精铣刨等处治措施,能有效改善层间受力状况,提高道路寿命。In order to study the impact of the base-surface contact conditions on pavement per- formance, the mechanical response of pavement under different bonding conditions between base and surface layer was analyzed. A numerical model based on delamination failure theory was es- tablished. Substructure analysis was used to study the bonding state influence on pavement with fine milling, rubber, SBS and conventional asphalt. Direct shear test was used to verify the pre- diction model. The results show that compared with traditional methods, delamination failure theory can reflect mechanical properties of interlayer with different materials and thicknesses; loss of stiffness in interlayer material can be considered with the increasing wheel load; fine mill- ing and other measures can improve the interlayer stress state under following condition, thin pavement, large horizontal load coefficient and heavy traffic. 2 tabs, 17 figs, 13 refs.

关 键 词：道路工程 基面层间 脱层失效 子结构 有限元 

分 类 号：U416.217[交通运输工程—道路与铁道工程]