沥青路面三向应变响应现场实测研究  

Field Measurement of Three-Direction Strain Response of Asphalt Pavement

作　　者：董泽蛟[1] 柳浩 谭忆秋[1] 陈凤晨[1] 王宝新 

机构地区：[1]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090 [2]北京市政路桥控股工业建材集团研发中心,北京100045

出　　处：《华南理工大学学报（自然科学版）》2009年第7期46-51,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50808056);教育部高等学校博士学科点新教师基金资助项目(20070213014);哈尔滨工业大学优秀青年教师培养计划项目(HITQNJS.2007.032)

摘　　要：沥青路面动态应变测试是掌握结构内部真实受力状态的有效手段.与单点单一方向应变测试方法不同,文中设计了沥青路面三向应变的测试方法,并给出了光纤光栅应变传感器的现场布设工艺,最后对不同荷载条件下的动态应变现场实测结果进行了初步分析.结果表明:沥青路面现场三向应变测试提供的信息丰富,从测试结果中能够看出沥青路面具有粘弹特性;不同荷载条件作用下,路面结构的应变响应具有显著的差别,基本随着车辆速度的增大而减小.文中最后给出了沥青路面应变现场测试的建议及进一步的研究方向.The measurement of dynamic strain of asphalt pavement helps to effectively reveal the real mechanical state within the pavement structure. In this paper, a three-direction strain measurement method at a single testing point, which is different from the traditional unilateral measurement at a single point, is proposed. Then, the in-situ layout scheme for Fiber Bragg Grating （FBG） strain sensors is presented, and the measured three-direction dyna- mic strain in different loading conditions are compared and analyzed. The results show that the three-direction strain measurement provides more useful information about the observable viscoelastic characteristics of asphalt pavement, and that the strain response of pavement varying with loading conditions basically decreases with the increase of vehicle speed. Some suggestions for the field strain measurement and its further development are finally offered in this paper.

关 键 词：道路工程 三向应变 沥青路面 光纤光栅应变传感器 

分 类 号：U416.2[交通运输工程—道路与铁道工程]