Concrete structure monitoring with distributed long-gauge optical fiber sensor

DOI

10.2991/icsmim-15.2016.206How to use a DOI?

Keywords

long-gauge optical fiber sensor; distributed strain; BOTDA; concrete crack; structural health monitoring.

Abstract

The distributed optical fiber sensing technology, Brillouin Optical Time Domain Analysis (BOTDA), is considered as an effective method for concrete structure monitoring due to its excellent strain sensing performance. However, its sensing accuracy is greatly decreased around the cracks by the influence of spatial resolution. In this paper a new type of optical fiber sensor is proposed based on BOTDA, namely long-gauge sensor, to improve the strain sensing performance especially around concrete cracks. The measurement principle of BOTDA was explained as well as the long-gauge sensor structure and performance. Finally some experiments were implemented to verify the actual sensing performance. From the results it can be concluded that the proposed method can be applied to accurately measure the strain distribution even under the case of large cracks. Considering some other sensing advantages, such as long-term sensing stability, the proposed method presents broad application propects especially in long-term SHM.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yongsheng Tang
PY  - 2016/01
DA  - 2016/01
TI  - Concrete structure monitoring with distributed long-gauge optical fiber sensor
BT  - Proceedings of the 2015 4th International Conference on Sensors, Measurement and Intelligent Materials
PB  - Atlantis Press
SP  - 1124
EP  - 1127
SN  - 2352-538X
UR  - https://doi.org/10.2991/icsmim-15.2016.206
DO  - 10.2991/icsmim-15.2016.206
ID  - Tang2016/01
ER  -