Cargando…

Monitoring of Epoxy-Grouted Bonding Strength Development between an Anchored Steel Bar and Concrete Using PZT-Enabled Active Sensing

Anchored steel bars have been widely used in retrofitting of existing concrete structures. The bonding strength between the anchored steel bar and the concrete is critical to the integrity of the strengthened concrete structure. This paper presents a method to monitor epoxy-grouted bonding strength...

Descripción completa

Detalles Bibliográficos
Autores principales: Jiang, Jian, Hei, Chuang, Feng, Qian, Jiang, Jinwei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539751/
https://www.ncbi.nlm.nih.gov/pubmed/31064124
http://dx.doi.org/10.3390/s19092096
_version_ 1783422462833197056
author Jiang, Jian
Hei, Chuang
Feng, Qian
Jiang, Jinwei
author_facet Jiang, Jian
Hei, Chuang
Feng, Qian
Jiang, Jinwei
author_sort Jiang, Jian
collection PubMed
description Anchored steel bars have been widely used in retrofitting of existing concrete structures. The bonding strength between the anchored steel bar and the concrete is critical to the integrity of the strengthened concrete structure. This paper presents a method to monitor epoxy-grouted bonding strength development by using a piezoceramic-enabled active sensing technique. One concrete beam with an anchored steel bar was involved in the monitoring test, and two concrete beams with six anchored steel bars were used in the pull-out test. To enable the active sensing, a Lead Zirconate Titanate (PZT) patch was bonded to the surface of the exposed end, and piezoceramic smart aggregates were embedded in each concrete specimen. During the monitoring experiment, signals from PZT sensors and smart aggregates were acquired at intervals of 0, 20, 40, 60, 80, and 100 min. In addition, a pull-out test was performed on each of the remaining six anchored steel bars in the two concrete beams, while the signal was recorded in the test. Furthermore, a wavelet packet analysis was applied to analyze the received signal energies to investigate the bonding strength development between the concrete and the anchored steel bar during the epoxy solidification process. The test results demonstrate the effectiveness of the proposed method in monitoring the bonding strength development between the anchored steel bar and the concrete, using the PZT-enabled active sensing.
format Online
Article
Text
id pubmed-6539751
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-65397512019-06-04 Monitoring of Epoxy-Grouted Bonding Strength Development between an Anchored Steel Bar and Concrete Using PZT-Enabled Active Sensing Jiang, Jian Hei, Chuang Feng, Qian Jiang, Jinwei Sensors (Basel) Article Anchored steel bars have been widely used in retrofitting of existing concrete structures. The bonding strength between the anchored steel bar and the concrete is critical to the integrity of the strengthened concrete structure. This paper presents a method to monitor epoxy-grouted bonding strength development by using a piezoceramic-enabled active sensing technique. One concrete beam with an anchored steel bar was involved in the monitoring test, and two concrete beams with six anchored steel bars were used in the pull-out test. To enable the active sensing, a Lead Zirconate Titanate (PZT) patch was bonded to the surface of the exposed end, and piezoceramic smart aggregates were embedded in each concrete specimen. During the monitoring experiment, signals from PZT sensors and smart aggregates were acquired at intervals of 0, 20, 40, 60, 80, and 100 min. In addition, a pull-out test was performed on each of the remaining six anchored steel bars in the two concrete beams, while the signal was recorded in the test. Furthermore, a wavelet packet analysis was applied to analyze the received signal energies to investigate the bonding strength development between the concrete and the anchored steel bar during the epoxy solidification process. The test results demonstrate the effectiveness of the proposed method in monitoring the bonding strength development between the anchored steel bar and the concrete, using the PZT-enabled active sensing. MDPI 2019-05-06 /pmc/articles/PMC6539751/ /pubmed/31064124 http://dx.doi.org/10.3390/s19092096 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
Jiang, Jian
Hei, Chuang
Feng, Qian
Jiang, Jinwei
Monitoring of Epoxy-Grouted Bonding Strength Development between an Anchored Steel Bar and Concrete Using PZT-Enabled Active Sensing
title Monitoring of Epoxy-Grouted Bonding Strength Development between an Anchored Steel Bar and Concrete Using PZT-Enabled Active Sensing
title_full Monitoring of Epoxy-Grouted Bonding Strength Development between an Anchored Steel Bar and Concrete Using PZT-Enabled Active Sensing
title_fullStr Monitoring of Epoxy-Grouted Bonding Strength Development between an Anchored Steel Bar and Concrete Using PZT-Enabled Active Sensing
title_full_unstemmed Monitoring of Epoxy-Grouted Bonding Strength Development between an Anchored Steel Bar and Concrete Using PZT-Enabled Active Sensing
title_short Monitoring of Epoxy-Grouted Bonding Strength Development between an Anchored Steel Bar and Concrete Using PZT-Enabled Active Sensing
title_sort monitoring of epoxy-grouted bonding strength development between an anchored steel bar and concrete using pzt-enabled active sensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539751/
https://www.ncbi.nlm.nih.gov/pubmed/31064124
http://dx.doi.org/10.3390/s19092096
work_keys_str_mv AT jiangjian monitoringofepoxygroutedbondingstrengthdevelopmentbetweenananchoredsteelbarandconcreteusingpztenabledactivesensing
AT heichuang monitoringofepoxygroutedbondingstrengthdevelopmentbetweenananchoredsteelbarandconcreteusingpztenabledactivesensing
AT fengqian monitoringofepoxygroutedbondingstrengthdevelopmentbetweenananchoredsteelbarandconcreteusingpztenabledactivesensing
AT jiangjinwei monitoringofepoxygroutedbondingstrengthdevelopmentbetweenananchoredsteelbarandconcreteusingpztenabledactivesensing