Abstract
Debonding at the FRP-concrete interface is one of the main failure modes in RC structures strengthened with externally bonded FRP under dynamic loading. Most debonding failures occur in the concrete adjacent to the FRP under static loading. Similar failure occurs in many cases under dynamic loading, although the mode shift phenomenon exists where failure may occur in the adhesive layer or at the concrete-adhesive or adhesive-FRP interfaces. This paper is concerned with the FRP debonding failure where failure occurs in the concrete adjacent to the adhesive-concrete interface, as in most static loading cases. It is well known that the strength of concrete-like materials under high strain rate events is higher than that under static loading, and this increase of strength is described commonly using the Dynamic Increase Factor (DIF). This paper presents a numerical study on the uniaxial tension DIF, with a particular focus on how the DIF may be included in an appropriate manner in the FE modelling using a local concrete model. The inevitable mesh-dependency issue due to numerical localization and its implications on the rate effect in meso-scale modelling of FRP-concrete bond behaviour are discussed.
Original language | English |
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Title of host publication | Insights and Innovations in Structural Engineering, Mechanics and Computation - Proceedings of the 6th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2016 |
Publisher | CRC Press/Balkema |
Pages | 1482-1487 |
Number of pages | 6 |
ISBN (Print) | 9781138029279 |
Publication status | Published - 01 Jan 2016 |
Event | 6th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2016 - Cape Town, South Africa Duration: 05 Sep 2016 → 07 Sep 2016 |
Conference
Conference | 6th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2016 |
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Country/Territory | South Africa |
City | Cape Town |
Period | 05/09/2016 → 07/09/2016 |
ASJC Scopus subject areas
- Mechanical Engineering
- Civil and Structural Engineering