Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (7): 46-51.

• Traffic & Transportation Engineering • Previous Articles     Next Articles

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）

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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