间接拉伸试验条件下沥青混合料变形特性  

Deformation behaviors of asphalt mixtures under indirect tensile experiment

作　　者：张蕾[1,2] 陈静云[3] 乔英娟[4] 王哲人[2] 

机构地区：[1]交通部公路科学研究院,北京100088 [2]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150001 [3]大连理工大学土木水利学院,辽宁大连116024 [4]同济大学交通运输工程学院,上海200092

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第6期856-858,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50578031)

摘　　要：为分析沥青混合料的劈裂拉伸性能,采用数字图像测量方法,实现了试样表面轴向变形和径向变形的同步测定,得到了粗骨料沥青混合料和细骨料沥青混合料在不同温度下的宏观力学性能及应力-应变关系。结果表明:粗骨料沥青混凝土呈脆性破坏趋势,细骨料沥青混凝土在破坏前进入塑性屈服阶段;材料的弹性压缩和剪切膨胀与载荷历史紧密相连,反映了材料的结构性变形过程。该成果对沥青路面的拉伸开裂研究具有一定的参考价值。In order to analyze the tensile performance of asphalt mixtures, a digital image processing system is used for indirect tensile test. The variation of axial and radial deformation of specimen is measured. The macro-mechanical performance and stress-strain relationship between fine and coarse asphalt concretes at different temperatures are obtained. It is seen that coarse asphalt concrete takes on brittle failure and fine asphalt concrete enters plastic yielding phase before failure. The elastic compression and shear dilatation of material is relative to loading history and reflect the structural deformation progressing of material. This result is significant to study the tensile failure of asphalt pavement.

关 键 词：间接拉伸试验 数字图像测量 应力应变关系 

分 类 号：U416.217[交通运输工程—道路与铁道工程]