设置OLSM-25防裂层的沥青路面车辆荷载应力有限元分析  

Finite Element Analysis on Traffic Load Stress of Asphalt Pavement with Open-graded Large Stone Asphalt Mixes( OLSM-25) Anti-cracking Layer

作　　者：赵亚兰[1] 郭红兵[1] 陈拴发[2] 

机构地区：[1]陕西交通职业技术学院公路工程系,陕西西安710018 [2]长安大学交通铺面材料教育部工程研究中心,陕西西安710064

出　　处：《郑州大学学报（工学版）》2015年第5期88-91,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：中央高校基本科研业务费专项资金项目(CHD 2010JC011);陕西省教育厅专项科研计划项目(14JK1067)

摘　　要：针对刚性基层沥青路面的反射裂缝问题,提出采用OLSM-25(Open-graded Large Stone Asphalt Mixes,OLSM)作为防裂层的方法,以国内外OLSM参考级配为基础,结合试验段修筑情况,采用三维有限元方法,建立设置OLSM-25防裂层的沥青路面有限元模型,对其车辆荷载应力进行有限元数值分析,提出OLSM-25防裂层荷载应力的实用计算公式,为设置OLSM-25防裂层的沥青路面结构设计提供理论依据.结果表明:在车辆荷载偏载作用下,轴载、贫混凝土基层厚度、沥青面层厚度、OLSM-25防裂层模量及厚度对OLSM-25防裂层的荷载应力具有显著影响.In view of the problem of the reflective cracking in the rigid base asphalt pavement, a method of using Open-graded Large Stone asphalt Mixes （OLSM） as the anti-cracking layer is proposed. On the basis of the reference gradation of OLSM in the domestic and international, combined with the test roads construction, by means of three-dimensional finite element method, the finite element model of asphalt pavement with OL- SM-25 anti-cracking layer has been established. Finite element numerical analysis on traffic load stress of asphalt pavement with OLSM-25 anti-cracking layer have been done. And practical formula of traffic load stress for OLSM-25 anti2craeking layer has been proposed. All these provide a theoretical basis for structural design of asphalt pavement with OLSM-25 anti-cracking layer. The result show that： under the action of the asymmetric traffic load, axle load, thickness of lean concrete base, thickness of the asphalt surface layer, modulus and thickness of OLSM-25 anti-cracking layer have significant influence on the traffic load stress of OLSM-25 anticracking layer.

关 键 词：道路工程 开级配大粒径沥青碎石 三维有限元 车辆荷载应力 数值分析 防裂层 

分 类 号：U416.224[交通运输工程—道路与铁道工程]