Correlation of load-bearing behavior of reinforced concrete members and velocity changes of coda waves
- The integral collection of information such as strains, cracks, or temperatures by ultrasound offers the best prerequisites to monitor structures during their lifetime. In this paper, a novel approach is proposed which uses the collected information in the coda of ultrasonic signals to infer the condition of a structure. This approach is derived from component tests on a reinforced concrete beam subjected to four-point bending in the lab at Ruhr University Bochum. In addition to ultrasonic measurements, strain of the reinforcement is measured with fiber optic sensors. Approached by the methods of moment-curvature relations, the steel strains serve as a reference for velocity changes of the coda waves. In particular, a correlation between the relative velocity change and the average steel strain in the reinforcement is derived that covers 90% of the total bearing capacity. The purely empirical model yields a linear function with a high level of accuracy (\(R^{2}\)=0.99, RMSE≈90\(\mu\)strain).
| Author: | Felix ClaußORCiDGND, Niklas EppleORCiDGND, Mark Alexander AhrensORCiDGND, Ernst NiederleithingerORCiDGND, Peter MarkORCiDGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-88405 |
| DOI: | https://doi.org/10.3390/ma15030738 |
| Parent Title (English): | Materials |
| Publisher: | MDPI |
| Place of publication: | Basel |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2022/04/22 |
| Date of first Publication: | 2022/01/19 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Tag: | coda wave interferometry; cracking; fiber optic sensors; moment-curvature relationship; reinforced concrete; strain; stress; structural health monitoring; tests; ultrasound |
| Volume: | 15 |
| Issue: | 3, Article 738 |
| First Page: | 738-1 |
| Last Page: | 738-17 |
| Institutes/Facilities: | Lehrstuhl für Massivbau |
| Dewey Decimal Classification: | Technik, Medizin, angewandte Wissenschaften / Ingenieurbau, Umwelttechnik |
| open_access (DINI-Set): | open_access |
| faculties: | Fakultät für Bau- und Umweltingenieurwissenschaften |
| Licence (English): |  Creative Commons - CC BY 4.0 - Attribution 4.0 International |
