摘要
沥青路面的平整状况对车辆行驶的安全性与舒适性具有较大影响,路面平整度不良也会导致各种道路病害的发生。结合美国NCHRP计划研究成果,采用力学-经验法的路面设计方法阐述了沥青路面平整度发展规律,借助拉丁超立方抽样和多元回归分析等计算机模拟技术来对沥青路面国际平整度指数(IRI)敏感性研究。研究表明:利用MEP-DG软件进行路面材料的参数敏感性分析时,借助多元回归分析方法可以对影响因素进行有效的筛选与定性分析;土基回弹模量、表面层的有效沥青含量、中面层的泊松比、有效沥青含量和空隙率对沥青路面的IRI具有显著影响。
Asphalt pavement smoothness plays an important role influencing running safety and comfort. Pavement unevenness can lead more pavement disease. This research adopts mechanistic-empirical pavement design guide （MEP DG） to study the development rule of pavement smoothness combined with the research result of national cooperative highway research program （NCHRP） project, computer aided engineering （CAE） simulation techniques, such as the lat-in hypercube sampling （LHS） technique and the multiple regression analysis, were applied to process sensitively analysis of material properties parameters on international roughness index（IRI）. The results of the study show that multiple re- gression analysis can determine the remarkable influence factor more efficiently and process to qualitative analysis when applying the MEPDG software in sensitively analysis of IRI. This research results show that subgrade resilience modulus, effective binder content of the surface layer and the Poisson＇s ratio, effective binder content and air void of the middle layer have significant effect to IRI of asphalt pavement.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2012年第6期42-47,共6页
Journal of Wuhan University of Technology
基金
国家自然科学基金(51178056)
中国博士后基金(201104503)
关键词
道路工程
MEPDG软件
多元回归
敏感性分析
LHS抽样
road engineering
MEPDG software
multiple regression analysis
sensitivity analysis
Latin Hy percube Sampling
