Acoustic Emission-based crack tracking for existing concrete structures: Influence of number of load cycles and loading speed

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

Abstract

Acoustic Emission (AE)-based crack tracking is a promising approach to locate cracks in concrete structures. Different from conventional AE, this approach uses AE activities during crack closure. But, AE activities during crack closure may be influenced by the number of load cycles and loading speed. This may challenge the applicability of AE-based crack tracking, especially for existing concrete structures with many load cycles in the service life. This paper investigates the influence of the number of load cycles and loading speed on AE-based crack tracking. A total of 80 load cycles were applied on a pre-cracked concrete beam. The last 5 cycles had increasing loading speeds. AE-based crack tracking was carried out in each load cycle. For calibration, Digital Image Correlation (DIC) was performed to measure the crack opening and closure. We found that AE-based crack tracking can locate the cracks, while, with many load cycles, it cannot indicate the crack width. Loading speed had little influence on AE-based crack tracking. The results of this paper put forward the applicability of AE-based crack tracking for existing concrete structures.
Original languageEnglish
Title of host publicationBridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations
Subtitle of host publicationProceedings of the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020)
EditorsH. Yokota, D.M. Frangopol
Place of PublicationLondon
PublisherCRC Press
Pages2393-2399
Number of pages7
Edition1st
ISBN (Electronic)9780429279119
DOIs
Publication statusPublished - 2021
Event10th International Conference on Bridge Maintenance, Safety and Management - Online due to COVID-19, Japan
Duration: 11 Apr 202118 Apr 2021
https://www.iabmas2020.org/index.html

Conference

Conference10th International Conference on Bridge Maintenance, Safety and Management
Abbreviated titleIABMAS 2020
CountryJapan
Period11/04/2118/04/21
Internet address

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