RESEARCH ON SENSING CHARACTERISTICS OF CFRP PLATES COUPLED WITH LARGE-RANGE FIBER GRATINGS

ZENG Zeying; ZHU Wanxu; LIU Fengrong; WEI Wei; LI Mengguo; LI Mingxia

doi:10.13204/j.gyjzG20010406

Volume 50 Issue 9

Nov. 2020

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ZENG Zeying, ZHU Wanxu, LIU Fengrong, WEI Wei, LI Mengguo, LI Mingxia. RESEARCH ON SENSING CHARACTERISTICS OF CFRP PLATES COUPLED WITH LARGE-RANGE FIBER GRATINGS[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(9): 174-180. doi: 10.13204/j.gyjzG20010406

Citation:

ZENG Zeying, ZHU Wanxu, LIU Fengrong, WEI Wei, LI Mengguo, LI Mingxia. RESEARCH ON SENSING CHARACTERISTICS OF CFRP PLATES COUPLED WITH LARGE-RANGE FIBER GRATINGS[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(9): 174-180. doi: 10.13204/j.gyjzG20010406

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RESEARCH ON SENSING CHARACTERISTICS OF CFRP PLATES COUPLED WITH LARGE-RANGE FIBER GRATINGS

doi: 10.13204/j.gyjzG20010406

ZENG Zeying^1,2,3,
ZHU Wanxu^1,2,3,
LIU Fengrong^1,2,3,
WEI Wei^1,2,3,
LI Mengguo^1,2,3,
LI Mingxia^{1,2,3
,
,}

1. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, Guilin 541004, China;
2. Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin 541004, China;
3. College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China

Received Date: 2020-06-05
Publish Date: 2020-11-23

Abstract

Abstract

Traditional reinforcement maintenance methods are difficult to obtain the full-life cycle monitoring status of the bridge during the reinforcement process as well as the reinforcement effect. Therefore, a method for coupling a CFRP board with a pre-compressed long-range fiber bragg grating (FBG) sensor to make a self-sensing CFRP board was proposed. In order to test the stress and strain measurement accuracy of the fiber grating self-sensing CFRP board, based on the relevant calculation principle of national standard static performance index, the calibration and tension test of light grating sensing performance index in self-sensing CFRP plate were carried out, and the error of sensing characteristic theory and test strain sensitivity were analyzed. The test results showed that the fiber grating in self-sensing CFRP had good sensing performance, its strain reached more than 1.2×10^-2, the test strain sensitivity was not less than 1.18 pm/10^-6, the hysteresis was not more than 1.52%, the linearity was not more than 3.35%, and the repeatability was not more than 2.29%. The total accuracy was not more than 3.92%, which could meet the actual engineering requirements.
- self-sensing cerp plate,
- FBG sensor,
- calibration test,
- sensing performance

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References(17)

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