Journal article
Acoustic emission monitoring of containment structures during post-tensioning
Engineering structures, v 209, p109930
15 Apr 2020
Abstract
This paper introduces a method based on acoustic emission (AE) to monitor the onset of delamination in post-tensioned concrete containment structures. The method is based on clustering AE occurring during post-tensioning and/or re-tensioning such structures. In particular, the investigation is focused on AE of a large-scale, curved concrete wall subject to monotonically increasing prestressing forces. This specimen is a representative of typical cylindrical concrete structures, such as water storage tanks, silos, bins, and nuclear containment structures. To analyze AE data, this paper uses both time-driven and hit-driven features extracted from AE. To this end, a novel approach is proposed to analyze and visualize hit-driven features. To detect and localize such defects, the proposed approach identifies an optimal number of clusters in AE data and interprets each cluster based on the physical mechanism that generates it. Such interpretations are compared with the state of stresses and modified Mohr-Coulomb failure criteria. The results show that the AE events are due to three categories of source mechanisms, micro shear cracking, micro tensile cracking, and macro delamination cracking. To validate the results, comparisons are made with through-thickness expansion measurements of the wall. The results demonstrate that the proposed approach can detect delamination defects and enable decision makers to take remedial and preventive actions.
Metrics
Details
- Title
- Acoustic emission monitoring of containment structures during post-tensioning
- Creators
- Arvin Ebrahimkhanlou - The University of Texas at AustinJongkwon Choi - Univ Texas Austin, Dept Civil Architectural & Environm Engn, FSEL, 10100 Burnet Rd,Bldg 177, Austin, TX 78758 USATrevor D. Hrynyk - The University of Texas at AustinSalvatore Salamone - The University of Texas at AustinOguzhan Bayrak - The University of Texas at Austin
- Publication Details
- Engineering structures, v 209, p109930
- Publisher
- Elsevier
- Number of pages
- 18
- Grant note
- MPR Associates
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000522248800002
- Scopus ID
- 2-s2.0-85076000575
- Other Identifier
- 991021889909004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Civil