Laser & Optoelectronics Progress, Volume. 54, Issue 12, 120603(2017)
Oblique Crack Monitoring of Concrete Beam with Macro FBG Strain Sensor
In order to meet the needs of bridge structure health monitoring, the home-made long-gauge fiber Bragg grating (FBG) macro strain sensor is used to measure average shear strain and identify occurrence of oblique cracks. The FBG is used as a measuring element and five couples of crossed topologies are designed. We use the cross topological theory to measure different parts of concrete T-beam, and analyze relationship between the average shear strain of the structure and load in crossed topological coverage. The experimental results show that the measuring method of the long-gauge FBG crossed topology is effective to identify occurrence and development of oblique cracks, and this method has good application value in engineering practice.
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Pang Xiangrun, Wang Dapeng. Oblique Crack Monitoring of Concrete Beam with Macro FBG Strain Sensor[J]. Laser & Optoelectronics Progress, 2017, 54(12): 120603
Category: Fiber Optics and Optical Communications
Received: Jul. 7, 2017
Accepted: --
Published Online: Dec. 11, 2017
The Author Email: Dapeng Wang (wangdapeng@usts.edu.cn)