华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (7): 46-51.

• 交通运输工程 • 上一篇    下一篇

沥青路面三向应变响应现场实测研究

董泽蛟1  柳浩2  谭忆秋1  陈凤晨1  王宝新2   

  1. 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
  • 收稿日期:2008-08-27 修回日期:1900-01-01 出版日期:2009-07-25 发布日期:2009-07-25
  • 通信作者: 董泽蛟(1979-),男,副教授,博士后,主要从事道路智能监检测及路面计算力学研究. E-mail:hitdzj@hit.edu.cn
  • 作者简介:董泽蛟(1979-),男,副教授,博士后,主要从事道路智能监检测及路面计算力学研究.
  • 基金资助:

    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)

Field Measurement of Three-Direction Strain Response of Asphalt Pavement

Dong Ze-jiao1  Liu Hao2  Tan Yi-qiu1  Chert Feng-chen1  Wang Bao-xin2   

  1. 1. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China; 2. Center of Pavement Material Research and Development, Beijing Municipal Road and Bridge Holding Company, Beijing 100045, China
  • Received:2008-08-27 Revised:1900-01-01 Online:2009-07-25 Published:2009-07-25
  • Contact: 董泽蛟(1979-),男,副教授,博士后,主要从事道路智能监检测及路面计算力学研究. E-mail:hitdzj@hit.edu.cn
  • About author:董泽蛟(1979-),男,副教授,博士后,主要从事道路智能监检测及路面计算力学研究.
  • Supported by:

    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.

关键词: 道路工程, 三向应变, 沥青路面, 光纤光栅应变传感器

Abstract:

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.

Key words: road engineering, three-direction strain, asphalt pavement, Fiber Bragg Grating strain sensor