Abstract
This paper presents some of the initial results from an ongoing research project which concerns a new NSMR strengthening method, expected to provide high ductility and strengthening effect as well as increased response consistency. A prestress of 1100 MPa activation was applied to the ductile NSMR system and compared to a reference beam. Ductility in this system is provided by a response controlling anchorage system, which interacts with the adhesively bonded NSMR. The proposed adhesive has a low E-modulus which is expected to reduce stress concentration issues of adhesively bonded joints when compared to stiffer epoxy adhesives are used, where IC-debonding seems to be the dominating failure mode. A beam deflection increase of approximately 105% has been observed when using the low E-modulus adhesive compared to the the epoxy adhesive. Change in the failure modes were furthermore observed, where the brittle de-bonding failure modes were mitigated thus extending the yielding regime with approximately 150%.
Original language | English |
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Title of host publication | Proceedings of the 3rd RILEM Spring Convention and Conference (RSCC 2020) : Service Life Extension of Existing Structures |
Editors | José Sena-Cruz, Luis Correia, Miguel Azenha |
Number of pages | 13 |
Volume | 3 |
Publisher | Springer |
Publication date | 2022 |
Pages | 349-361 |
ISBN (Print) | 978-3-030-76464-7 |
ISBN (Electronic) | 978-3-030-76465-4 |
DOIs | |
Publication status | Published - 2022 |
Event | 3rd RILEM Spring Convention and Conference (RSCC 2020) - Guimarães, Portugal Duration: 10 Mar 2020 → 14 Mar 2020 Conference number: 3 |
Conference
Conference | 3rd RILEM Spring Convention and Conference (RSCC 2020) |
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Number | 3 |
Country/Territory | Portugal |
City | Guimarães |
Period | 10/03/2020 → 14/03/2020 |
Series | RILEM Bookseries |
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Volume | 34 |
ISSN | 2211-0844 |
Bibliographical note
Publisher Copyright:© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
Keywords
- Activation
- Anchorage
- CFRP
- Ductility
- Ductility mechanism
- Flexible adhesive
- NSMR
- Strengthening