Finite element analysis-based study of fiber Bragg grating sensor for cracks detection in reinforced concrete

Lili Wang; Xiangjun Xin; Jun Song; Honggang Wang; Yaozhang Sai

doi:10.1117/1.OE.57.2.027103

15 February 2018 Finite element analysis-based study of fiber Bragg grating sensor for cracks detection in reinforced concrete

Lili Wang, Xiangjun Xin, Jun Song, Honggang Wang, Yaozhang Sai

Author Affiliations +

Optical Engineering, Vol. 57, Issue 2, 027103 (February 2018). https://doi.org/10.1117/1.OE.57.2.027103

Abstract

Fiber Bragg sensor is applied for detecting and monitoring the cracks that occur in the reinforced concrete. We use the three-dimensional finite element model to provide the three-axial stresses along the fiber Bragg sensor and then converted the stresses as a wavelength deformation of fiber Bragg grating (FBG) reflected spectrum. For the crack detection, an FBG sensor with 10-mm length is embedded in the reinforced concrete, and its reflection spectrum is measured after loading is applied to the concrete slab. As a result, the main peak wavelength and the ratio of the peak reflectivity to the maximal side-mode reflectivity of the optic-fiber grating represent the fracture severity. The fact that the sharp decreasing of the ratio of the peak reflectivity to the maximal side-mode reflectivity represents the early crack is confirmed by the theoretical calculation. The method can be used to detect the cracks in the reinforced concrete and give safety evaluation of large-scale infrastructure.

Citation Download Citation

Lili Wang, Xiangjun Xin, Jun Song, Honggang Wang, and Yaozhang Sai "Finite element analysis-based study of fiber Bragg grating sensor for cracks detection in reinforced concrete," Optical Engineering 57(2), 027103 (15 February 2018). https://doi.org/10.1117/1.OE.57.2.027103

Received: 21 September 2017; Accepted: 23 January 2018; Published: 15 February 2018

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available