层间接触状态对路表动态黏弹弯沉的影响

发布时间：2018-03-17 13:13

本文选题：道路工程　切入点：接触状态　出处：《北京工业大学学报》2017年04期 　论文类型：期刊论文

【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.
[Abstract]:In order to study the influence of the contact state of the structure layer on the deflection of the pavement surface, the dynamic viscoelastic analysis of semi-rigid and flexible asphalt pavement structure was carried out by using ABAQUS software. The asphalt mixture was used as the viscoelastic material in the process of analysis. The typical load of falling weight deflectometer (FWD) is used to calculate the time history curve of pavement surface deflection under the sliding state of different structure layers, and to compare with the continuous state. The results show that: for multi-layer pavement structure system, The contact state of the structure layer has obvious influence on the surface deflection, among which the surface-base sliding state has the greatest influence on the surface deflection, and the peak value of the deflection at the load center is increased by more than 50% compared with the continuous state. Moreover, the influence of contact state on the deflection of road surface is also related to the position of the layer. The results show that the interlayer contact state should be fully taken into account in the mechanical analysis of pavement. Especially, it is more important for pavement quality evaluation and modulus inversion using deflection value.
【作者单位】：大连理工大学土木工程学院;大连理工大学交通运输学院;
【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)
【分类号】：U416.2

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