层间接触状态对路表动态黏弹弯沉的影响  

Influence on the Surface Dynamic Viscoelastic Deflection of Interlayer Bonding Condition

作　　者：曹丹丹[1] 赵延庆[2] 付国志 

机构地区：[1]大连理工大学土木工程学院,大连116024 [2]大连理工大学交通运输学院,大连116024

出　　处：《北京工业大学学报》2017年第4期600-605,共6页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(51208080);山西交通科技资助项目(2015-1-22);内蒙古交通科技资助项目(NJ-2014-21)

摘　　要：为研究结构层接触状态对路表弯沉影响,采用ABAQUS软件对半刚性、柔性基层沥青路面结构进行动态黏弹性分析,分析过程中将沥青混合料作为黏弹性材料,荷载选用落锤式弯沉仪(FWD)典型荷载,计算沥青路面结构在不同结构层处于滑动状态下路表弯沉时程曲线,并与连续状态进行对比分析.结果表明:对于多层路面结构体系,结构层接触状态对路表弯沉具有明显影响,其中面-基层滑动状态对路表弯沉影响程度最大,荷载中心处的弯沉峰值相对于连续状态均增加了50%以上,而且接触状态对路表弯沉的影响还与层位的位置相关.研究结果表明,在对路面进行力学分析时,应充分考虑层间接触状态,尤其对于利用弯沉值进行路面质量评价以及模量反演更为重要.In order to learn the effect of interlayer bonding condition on surface deflection, software ABAQUS was adapted to do dynamic viscoelastic analysis for asphalt pavement with semi-rigid base and flexible base,asphalt concrete was considered as viscoelastic material and the load was falling weight deflectometer （FWD ） load in the process. Surface deflection time-history curve under any interlayer smooth condition was calculated and compared with the results under all interlayers bonded for the same asphalt pavement. Results indicate that interlayer bonding condition has significant influence on the surface deflection for the multiple layers structure. Th e conditions between surface and base has a significant influence on a content to 50%,the influence has a relationship with the location where smooth occurs. It can be concluded that for mechanical response analysis of the asphalt pavement,the interlayer condition should be considered,especially for the assessment and modulus back-calculation process.

关 键 词：道路工程 接触状态 路表弯沉 时程曲线 

分 类 号：U416.217[交通运输工程—道路与铁道工程]