Performance Evaluation of GFRP Rock Bolt Sensor for Rock Slope Monitoring by Double Shear Test

This study aims to evaluate the sensing performance of glass fiber-reinforced polymer (GFRP) rock bolt sensors instrumented with strain gauges for monitoring rockslides. Experimental studies are conducted with four different types of GFRP rock bolt sensors and concrete blocks having central holes an...

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Main Authors: Jung-Doung Yu, Jong-Sub Lee, Bibek Tamang, Sungyong Park, Sukhyun Chang, Jungmyeon Kim, Yongseong Kim
Format: Article
Language:English
Published: Hindawi Limited 2020-01-01
Series:Advances in Civil Engineering
Online Access:http://dx.doi.org/10.1155/2020/8870698
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spelling doaj-bd29c2fc7a48492ba17b108ff61c2eef2020-11-25T01:25:40ZengHindawi LimitedAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88706988870698Performance Evaluation of GFRP Rock Bolt Sensor for Rock Slope Monitoring by Double Shear TestJung-Doung Yu0Jong-Sub Lee1Bibek Tamang2Sungyong Park3Sukhyun Chang4Jungmyeon Kim5Yongseong Kim6School of Civil, Environmental, and Architectural Engineering, Korea University, Seoul 02841, Republic of KoreaSchool of Civil, Environmental, and Architectural Engineering, Korea University, Seoul 02841, Republic of KoreaDepartment of Regional Infrastructure Engineering, Kangwon National University, Chuncheon 24341, Republic of KoreaCitizens Safety Division, Yongin City Hall, Yongin, Gyeonggi-do 17019, Republic of KoreaDepartment of Regional Infrastructure Engineering, Kangwon National University, Chuncheon 24341, Republic of KoreaDong Myeong Engineering Consultants & Architecture, Hwaseong-si, Gyeonggi-do, Republic of KoreaDepartment of Regional Infrastructure Engineering, Kangwon National University, Chuncheon 24341, Republic of KoreaThis study aims to evaluate the sensing performance of glass fiber-reinforced polymer (GFRP) rock bolt sensors instrumented with strain gauges for monitoring rockslides. Experimental studies are conducted with four different types of GFRP rock bolt sensors and concrete blocks having central holes and two shear joints. Two GFRP rock bolt sensors are inserted into holes and then fixed in concrete blocks with cement grout and soil, respectively. The other two are coated with heat-shrink tubes to protect strain gauges and wires, which are then fixed in concrete blocks with cement grout and soil, respectively. Double shear tests are performed to produce shear deformations of GFRP rock bolt sensors, and then strain change with shear displacement is monitored. The results manifest that the variation in strain with shear displacement is more sensitive in the GFRP rock bolt sensor fixed with soil than with cement grout. Also, strain gauge wires in the GFRP rock bolt sensor fixed with cement grout are broken earlier than with soil. Furthermore, it is confirmed that the heat-shrink tube effectively protects strain gauges and wires, so that GFRP rock bolt sensors coated with heat-shrink tubes work for a longer time than the uncoated sensors. The present study shows that the GFRP rock bolt sensor can be useful for monitoring rock slope failure.http://dx.doi.org/10.1155/2020/8870698
collection DOAJ
language English
format Article
sources DOAJ
author Jung-Doung Yu
Jong-Sub Lee
Bibek Tamang
Sungyong Park
Sukhyun Chang
Jungmyeon Kim
Yongseong Kim
spellingShingle Jung-Doung Yu
Jong-Sub Lee
Bibek Tamang
Sungyong Park
Sukhyun Chang
Jungmyeon Kim
Yongseong Kim
Performance Evaluation of GFRP Rock Bolt Sensor for Rock Slope Monitoring by Double Shear Test
Advances in Civil Engineering
author_facet Jung-Doung Yu
Jong-Sub Lee
Bibek Tamang
Sungyong Park
Sukhyun Chang
Jungmyeon Kim
Yongseong Kim
author_sort Jung-Doung Yu
title Performance Evaluation of GFRP Rock Bolt Sensor for Rock Slope Monitoring by Double Shear Test
title_short Performance Evaluation of GFRP Rock Bolt Sensor for Rock Slope Monitoring by Double Shear Test
title_full Performance Evaluation of GFRP Rock Bolt Sensor for Rock Slope Monitoring by Double Shear Test
title_fullStr Performance Evaluation of GFRP Rock Bolt Sensor for Rock Slope Monitoring by Double Shear Test
title_full_unstemmed Performance Evaluation of GFRP Rock Bolt Sensor for Rock Slope Monitoring by Double Shear Test
title_sort performance evaluation of gfrp rock bolt sensor for rock slope monitoring by double shear test
publisher Hindawi Limited
series Advances in Civil Engineering
issn 1687-8086
1687-8094
publishDate 2020-01-01
description This study aims to evaluate the sensing performance of glass fiber-reinforced polymer (GFRP) rock bolt sensors instrumented with strain gauges for monitoring rockslides. Experimental studies are conducted with four different types of GFRP rock bolt sensors and concrete blocks having central holes and two shear joints. Two GFRP rock bolt sensors are inserted into holes and then fixed in concrete blocks with cement grout and soil, respectively. The other two are coated with heat-shrink tubes to protect strain gauges and wires, which are then fixed in concrete blocks with cement grout and soil, respectively. Double shear tests are performed to produce shear deformations of GFRP rock bolt sensors, and then strain change with shear displacement is monitored. The results manifest that the variation in strain with shear displacement is more sensitive in the GFRP rock bolt sensor fixed with soil than with cement grout. Also, strain gauge wires in the GFRP rock bolt sensor fixed with cement grout are broken earlier than with soil. Furthermore, it is confirmed that the heat-shrink tube effectively protects strain gauges and wires, so that GFRP rock bolt sensors coated with heat-shrink tubes work for a longer time than the uncoated sensors. The present study shows that the GFRP rock bolt sensor can be useful for monitoring rock slope failure.
url http://dx.doi.org/10.1155/2020/8870698
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