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Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating Sensors
Glass fiber-reinforced polymer (GFRP) bolts have been widely used in some applications of grouted anchors because of the advantages of better resistance to corrosion, high strength-to-weight ratio, low electromagnetic properties, and so on. This study presents a field test to assess the feasibility...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480335/ https://www.ncbi.nlm.nih.gov/pubmed/30925714 http://dx.doi.org/10.3390/s19071507 |
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author | Kou, Hai-Lei Li, Wang Zhang, Wang-Chun Zhou, Yuan Zhou, Xiao-Long |
author_facet | Kou, Hai-Lei Li, Wang Zhang, Wang-Chun Zhou, Yuan Zhou, Xiao-Long |
author_sort | Kou, Hai-Lei |
collection | PubMed |
description | Glass fiber-reinforced polymer (GFRP) bolts have been widely used in some applications of grouted anchors because of the advantages of better resistance to corrosion, high strength-to-weight ratio, low electromagnetic properties, and so on. This study presents a field test to assess the feasibility of fiber Bragg grating (FBG) sensors in monitoring the stress profile of GFRP anchors during pulling test. Two GFRP anchors were fully instrumented with FBG sensors and then installed into the ground using a drilling and grouting method. To measure the stress profile along test anchors, seven bare FBG sensors were arranged in a single optical fiber and then embedded in the middle of GFRP bolts in the process of extrusion molding. The procedure for embedding bare FBG sensors into GFRP bolts is introduced first. Then, the axial forces and shear stresses that were calculated from the measurements of the FBG sensors are discussed. The field test results indicate that the embedded FBG technology was feasible to monitor the stress state of GFRP anchors during pulling. |
format | Online Article Text |
id | pubmed-6480335 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64803352019-04-29 Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating Sensors Kou, Hai-Lei Li, Wang Zhang, Wang-Chun Zhou, Yuan Zhou, Xiao-Long Sensors (Basel) Article Glass fiber-reinforced polymer (GFRP) bolts have been widely used in some applications of grouted anchors because of the advantages of better resistance to corrosion, high strength-to-weight ratio, low electromagnetic properties, and so on. This study presents a field test to assess the feasibility of fiber Bragg grating (FBG) sensors in monitoring the stress profile of GFRP anchors during pulling test. Two GFRP anchors were fully instrumented with FBG sensors and then installed into the ground using a drilling and grouting method. To measure the stress profile along test anchors, seven bare FBG sensors were arranged in a single optical fiber and then embedded in the middle of GFRP bolts in the process of extrusion molding. The procedure for embedding bare FBG sensors into GFRP bolts is introduced first. Then, the axial forces and shear stresses that were calculated from the measurements of the FBG sensors are discussed. The field test results indicate that the embedded FBG technology was feasible to monitor the stress state of GFRP anchors during pulling. MDPI 2019-03-28 /pmc/articles/PMC6480335/ /pubmed/30925714 http://dx.doi.org/10.3390/s19071507 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kou, Hai-Lei Li, Wang Zhang, Wang-Chun Zhou, Yuan Zhou, Xiao-Long Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating Sensors |
title | Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating Sensors |
title_full | Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating Sensors |
title_fullStr | Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating Sensors |
title_full_unstemmed | Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating Sensors |
title_short | Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating Sensors |
title_sort | stress monitoring on gfrp anchors based on fiber bragg grating sensors |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480335/ https://www.ncbi.nlm.nih.gov/pubmed/30925714 http://dx.doi.org/10.3390/s19071507 |
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