Highly dense strain measurement of concrete retrofitted with smart fabric

M. Imai; H. Suzuki

doi:10.1117/12.878394

18 April 2011 Highly dense strain measurement of concrete retrofitted with smart fabric

M. Imai, H. Suzuki

Proceedings Volume 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011; 798318 (2011) https://doi.org/10.1117/12.878394
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

A significant technical advancement in distributed fiber optic strain sensors has been accomplished: Brillouin optical correlation domain analysis (BOCDA) provides a high spatial resolution and the smallest measurement interval due to Brillouin scattering stimulated by the correlation of two counter-propagating lightwaves. In a BOCDA-based system, the measurement position can be varied continuously by changing the modulation frequency, whereas other systems require a sophisticated A/D board for localizing the measurement position. In fact, 50 mm is the current limit of the measurement interval in conventional time-domain-based systems, because higher sampling rates are required to process information traveling at the speed of lightwaves. This paper presents an experimental study on cracked concrete specimen retrofitted with a ply of smart fabric; a fiber optic sensor (FOS) is woven into the fabric. The strain distribution along the sensing fiber is measured to detect the debonding of the smart fabric from the concrete specimen under loading, and the measured highly dense strain information obtained using BOCDA is found to potentially facilitate a better understanding of structural behavior.

Citation Download Citation

M. Imai and H. Suzuki "Highly dense strain measurement of concrete retrofitted with smart fabric", Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 798318 (18 April 2011); https://doi.org/10.1117/12.878394

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