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Experimental study on strain monitoring of asphalt concrete using FBG(Fiber Bragg Grating)(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2011年03期
Page:
17-20
Research Field:
Publishing date:
2011-06-30

Info

Title:
Experimental study on strain monitoring of asphalt concrete using FBG(Fiber Bragg Grating)
Author(s):
XIE Jian-guang1;  WANG Qiu-tong2;  LIU Shu-long2;  LI Ke1;  ZHANG Song1
1. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; 2. CCCC Nanjing Highway and Bridge Consultants Co Ltd, Nanjing 210014, Jiangsu, China
Keywords:
road engineering;  FBG sensor;  asphalt concrete;  rutting test;  strain monitoring
PACS:
U416.217
DOI:
-
Abstract:
A packaged FBG strain sensor based on the principle of FBG sensing and characteristics of asphalt concrete pavement was designed for the experimental study on strain monitoring of asphalt concrete. The designed structure of FBG sensor and strain sensing performance was presented. A calibration test for FBG sensor was implemented, its strain sensitivity coefficient of FBG sensor is 1.1 pm/με, and the fiber grating strain sensing performance would not be changed by packaging technology. The correlation between pressure and axial strain is 0.038 7 με/N after embedded in SMA-13 asphalt concrete. Sensor static test by ANSYS 11.0 simulation show that sensor strain sensitivity correction factor η is equal to 0.928. FBG strain sensor was used to monitor internal structure of asphalt concrete axial strain. The dynamic test for 5 hours by rutting test show that when increasing the number of rolling, the axial strain can be increased. Monitoring result can reflect the fundamental changes of strain in structural layers of asphalt concrete.The sensor can be used to monitor the strain of asphalt pavement to provide a new method decision-making for pavement maintenance. 7 figs, 9 refs.

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Memo

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Last Update: 2011-06-30