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Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy

Grouted splice sleeve (GSS) connectors are mainly used in precast concrete structures. However, errors in manual operation during construction cause grouted defects in the GSS connector, which can lead to a negative effect on the overall mechanical properties of the structures. Owing to the complex...

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Detalles Bibliográficos
Autores principales: Li, Zuohua, Zheng, Lilin, Chen, Chaojun, Long, Zhili, Wang, Ying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480554/
https://www.ncbi.nlm.nih.gov/pubmed/30959871
http://dx.doi.org/10.3390/s19071642
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author Li, Zuohua
Zheng, Lilin
Chen, Chaojun
Long, Zhili
Wang, Ying
author_facet Li, Zuohua
Zheng, Lilin
Chen, Chaojun
Long, Zhili
Wang, Ying
author_sort Li, Zuohua
collection PubMed
description Grouted splice sleeve (GSS) connectors are mainly used in precast concrete structures. However, errors in manual operation during construction cause grouted defects in the GSS connector, which can lead to a negative effect on the overall mechanical properties of the structures. Owing to the complex structure of precast concrete members with a GSS connector, it is difficult to detect grouted defects effectively using traditional ultrasonic parameters. In this paper, a wavelet packet analysis algorithm was developed to effectively detect grouted defects using the ultrasonic method, and a verified experiment was carried out. Laboratory detection was performed on the concrete specimens with a GSS connector before grouting, in which the grouted defects were mimicked with five sizes in five GSS connectors of each specimen group. A simple and convenient ultrasonic detection system was developed, and the specimens were detected. According to the proposed grouted defect index, the results demonstrated that when the grouted defects reached certain sizes, the proposed method could detect the grouted defects effectively. The proposed method is effective and easy to implement at a construction site with simple instruments, and so provides an innovative method for grouted defects detection of precast concrete members.
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spelling pubmed-64805542019-04-29 Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy Li, Zuohua Zheng, Lilin Chen, Chaojun Long, Zhili Wang, Ying Sensors (Basel) Article Grouted splice sleeve (GSS) connectors are mainly used in precast concrete structures. However, errors in manual operation during construction cause grouted defects in the GSS connector, which can lead to a negative effect on the overall mechanical properties of the structures. Owing to the complex structure of precast concrete members with a GSS connector, it is difficult to detect grouted defects effectively using traditional ultrasonic parameters. In this paper, a wavelet packet analysis algorithm was developed to effectively detect grouted defects using the ultrasonic method, and a verified experiment was carried out. Laboratory detection was performed on the concrete specimens with a GSS connector before grouting, in which the grouted defects were mimicked with five sizes in five GSS connectors of each specimen group. A simple and convenient ultrasonic detection system was developed, and the specimens were detected. According to the proposed grouted defect index, the results demonstrated that when the grouted defects reached certain sizes, the proposed method could detect the grouted defects effectively. The proposed method is effective and easy to implement at a construction site with simple instruments, and so provides an innovative method for grouted defects detection of precast concrete members. MDPI 2019-04-06 /pmc/articles/PMC6480554/ /pubmed/30959871 http://dx.doi.org/10.3390/s19071642 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
Li, Zuohua
Zheng, Lilin
Chen, Chaojun
Long, Zhili
Wang, Ying
Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy
title Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy
title_full Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy
title_fullStr Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy
title_full_unstemmed Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy
title_short Ultrasonic Detection Method for Grouted Defects in Grouted Splice Sleeve Connector Based on Wavelet Pack Energy
title_sort ultrasonic detection method for grouted defects in grouted splice sleeve connector based on wavelet pack energy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480554/
https://www.ncbi.nlm.nih.gov/pubmed/30959871
http://dx.doi.org/10.3390/s19071642
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AT chenchaojun ultrasonicdetectionmethodforgrouteddefectsingroutedsplicesleeveconnectorbasedonwaveletpackenergy
AT longzhili ultrasonicdetectionmethodforgrouteddefectsingroutedsplicesleeveconnectorbasedonwaveletpackenergy
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