含层间界面的沥青混合料复合小梁弯曲疲劳试验  

Flexural Fatigue Test on Beams of Asphalt Mixture Involving Inter-surface

作　　者：艾长发[1] 成猛[1] 杨涛[1] 邱延峻[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《公路交通科技》2011年第12期27-31,38,共6页Journal of Highway and Transportation Research and Development

基　　金：中央高校基本科研业务费专项资金项目(SWJTU09CX013);四川省交通厅科技项目(SC2008.1-3-1)

摘　　要：为探讨层间界面条件对沥青路面疲劳寿命的影响,完善路面疲劳模型,采用小梁弯曲疲劳试验方法,测定不同粘层油用量、不同温度、不同加载等试验条件下复合小梁试件的疲劳寿命。研究结果表明:(1)由于层间界面的存在,导致沥青路面结构整体性减弱,疲劳寿命减小;(2)随着粘层油用量的增加,疲劳寿命呈现先增加后减小的变化规律,并且粘层油用量存在一个最佳值,在此最佳用量下,沥青路面的抗疲劳性能明显提高;(3)与低温条件相比,常温条件下沥青路面的疲劳破损更容易发生,并且车辆超载,轴重增大,会显著降低沥青路面的疲劳寿命;(4)确定了疲劳寿命与粘层油用量、温度、加载量之间的相互关系,通过数值回归分析,建立了疲劳寿命与各影响因素之间的相互作用关系式。The fatigue life of composite beam samples were measured using method of flexural fatigue test in different tack asphalt coat contents, temperatures and loads to study the influence of interlamination contact on the fatigue life of asphalt pavement and perfect the pavement fatigue model. The results show that （ 1 ） the integrity and fatigue life of asphalt pavement decreased due to the existence of interlamination contact; （2） the fatigue life first increased, then decreased with the increase of the content of tack asphalt coat, and there was an optimum content of tack asphalt coat for usage, which can put the fatigue resistance in a higher level ; （3） the fatigue failure would happen more easily at normal temperature than at low temperature, and the fatigue life would decrease significantly if vehicle is overweight ; （4） the relation of fatigue life with content of tack asphalt coat, temperature and load was found out, and the total fatigue equations were set up.

关 键 词：道路工程 疲劳模型 小梁弯曲疲劳试验 沥青混合料 粘层油 

分 类 号：U414.750.3[交通运输工程—道路与铁道工程]