长寿命沥青路面沥青层力学分析及其层位划分研究  

Mechanical Analysis and Asphalt Layer Subdivision of Long Life Asphalt Pavement(LLAP)Structures

作　　者：聂忆华[1] 张起森[2] 

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]长沙理工大学,湖南长沙410076

出　　处：《公路交通科技》2008年第5期13-17,共5页Journal of Highway and Transportation Research and Development

基　　金：交通部西部交通建设科技资助项目(200431800002);中南林业科技大学青年基金资助项目(101-0708)

摘　　要：基于我国沥青路面设计理论及标准，参考国际成功的长寿命沥青路面结构，选取不同的长寿命沥青路面结构与材料参数，如结构层厚度、模量和泊松比等，采用BISAR3．0路面力学计算程序计算不同深度处的力学响应，分析其计算结果。数据分析结果表明，对于长寿命沥青路面结构：其力学响应规律具有普遍性，在综合考虑各种结构层材料性能与厚度条件下，沥青层内0～7cm为高受力复合区域，是各种损坏最易发生区域；沥青层最大拉应变易出现在沥青层表面和沥青层底面，是产生路表开裂和沥青层底疲劳开裂的主要原因；沥青层合理划分为3层，分别为磨耗层、联结层和下承层，给出了各结构层应满足的力学性能要求及厚度范围。Based on asphalt pavement design theory and criterions in China, and referring to successful long life asphalt pavement structures in foreign countries, the stress-strain data in different depths were calculated by using BISAR3.0 program, taking different structures and materials, such as different structure thickness, modulus and Poisson ratio, etc. The data analysis results show that it is a high compound stress area in 0 ～ 7 cm depth under surface in asphalt layer and easy to emerge various damages in many kinds of long life asphalt pavement structures and materials; the maximum tensile strain always appears in surface or the bottom of asphalt layer, so it is easy to induce surface cracking and bottom fatigue cracking. The asphalt layer was subdivided to three layers as wearing course, binding course and sub surface, and each subdivisional layer＇s mechanical demands and thickness demands were put forward.

关 键 词：道路工程 长寿命沥青路面(LLAP) 力学计算 层位划分 

分 类 号：U416.217[交通运输工程—道路与铁道工程]