Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018 |
| Herausgeber/-innen | Nigel Powers, Dan M. Frangopol, Riadh Al-Mahaidi, Colin Caprani |
| Seiten | 465-471 |
| Seitenumfang | 7 |
| Publikationsstatus | Veröffentlicht - 2018 |
| Extern publiziert | Ja |
| Veranstaltung | 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018 - Melbourne, Australien Dauer: 9 Juli 2018 → 13 Juli 2018 |
Publikationsreihe
| Name | Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018 |
|---|
Abstract
This paper proposes a novel retrofitting system for the strengthening of steel I-beams using prestressed unbonded carbon fiber reinforced polymer (CFRP) plates. The system relies on a pair of mechanical clamps. Each clamp holds two flat CFRP plates (each 50 × 1.4 mm) and anchors their prestressing forces to the steel I-beam via friction. The proposed system does not require any adhesive between the CFRP plates and the steel substrate; therefore, surface preparation and adhesive curing are not needed, which reduces the time and cost of retrofitting. The design considerations of the mechanical clamps, the most important elements of the proposed unbonded system, are explained. A finite element (FE) model was established to optimize the design of the required mechanical parts, and a set of pull-off tests was performed to evaluate the capacity of the optimized system. The experimental results show that the proposed system is capable of transferring almost the entire tensile capacity of the normal modulus CFRP plates to the steel substrate via friction, while no sliding of the joint was observed. Moreover, the proposed flat prestressed unbonded reinforcement (FPUR) system was applied on a 6.4-m-long steel I-beam and the high performance of the system was confirmed based on the results of a set of four-point static and fatigue tests. Relying on the laboratory experimental tests, the proposed FPUR system was applied on the cross-girders of an almost 120-year-old steel bridge in Australia to monitor its long-term performance as a strengthening solution to increase the capacity and/or fatigue life of existing metallic I-beams.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Tief- und Ingenieurbau
- Ingenieurwesen (insg.)
- Sicherheit, Risiko, Zuverlässigkeit und Qualität
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- BibTex
- RIS
Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018. Hrsg. / Nigel Powers; Dan M. Frangopol; Riadh Al-Mahaidi; Colin Caprani. 2018. S. 465-471 (Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Flat prestressed unbonded reinforcement (FPUR) system for strengthening of steel I-beams
AU - Hosseini, Ardalan
AU - Ghafoori, Elyas
AU - Motavalli, Masoud
AU - Nussbaumer, Alain
AU - Zhao, Xiao Ling
AU - Al-Mahaidi, Riadh
N1 - Publisher Copyright: © 2018 Taylor & Francis Group, London, UK.
PY - 2018
Y1 - 2018
N2 - This paper proposes a novel retrofitting system for the strengthening of steel I-beams using prestressed unbonded carbon fiber reinforced polymer (CFRP) plates. The system relies on a pair of mechanical clamps. Each clamp holds two flat CFRP plates (each 50 × 1.4 mm) and anchors their prestressing forces to the steel I-beam via friction. The proposed system does not require any adhesive between the CFRP plates and the steel substrate; therefore, surface preparation and adhesive curing are not needed, which reduces the time and cost of retrofitting. The design considerations of the mechanical clamps, the most important elements of the proposed unbonded system, are explained. A finite element (FE) model was established to optimize the design of the required mechanical parts, and a set of pull-off tests was performed to evaluate the capacity of the optimized system. The experimental results show that the proposed system is capable of transferring almost the entire tensile capacity of the normal modulus CFRP plates to the steel substrate via friction, while no sliding of the joint was observed. Moreover, the proposed flat prestressed unbonded reinforcement (FPUR) system was applied on a 6.4-m-long steel I-beam and the high performance of the system was confirmed based on the results of a set of four-point static and fatigue tests. Relying on the laboratory experimental tests, the proposed FPUR system was applied on the cross-girders of an almost 120-year-old steel bridge in Australia to monitor its long-term performance as a strengthening solution to increase the capacity and/or fatigue life of existing metallic I-beams.
AB - This paper proposes a novel retrofitting system for the strengthening of steel I-beams using prestressed unbonded carbon fiber reinforced polymer (CFRP) plates. The system relies on a pair of mechanical clamps. Each clamp holds two flat CFRP plates (each 50 × 1.4 mm) and anchors their prestressing forces to the steel I-beam via friction. The proposed system does not require any adhesive between the CFRP plates and the steel substrate; therefore, surface preparation and adhesive curing are not needed, which reduces the time and cost of retrofitting. The design considerations of the mechanical clamps, the most important elements of the proposed unbonded system, are explained. A finite element (FE) model was established to optimize the design of the required mechanical parts, and a set of pull-off tests was performed to evaluate the capacity of the optimized system. The experimental results show that the proposed system is capable of transferring almost the entire tensile capacity of the normal modulus CFRP plates to the steel substrate via friction, while no sliding of the joint was observed. Moreover, the proposed flat prestressed unbonded reinforcement (FPUR) system was applied on a 6.4-m-long steel I-beam and the high performance of the system was confirmed based on the results of a set of four-point static and fatigue tests. Relying on the laboratory experimental tests, the proposed FPUR system was applied on the cross-girders of an almost 120-year-old steel bridge in Australia to monitor its long-term performance as a strengthening solution to increase the capacity and/or fatigue life of existing metallic I-beams.
UR - http://www.scopus.com/inward/record.url?scp=85067066375&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85067066375
SN - 9781138730458
T3 - Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018
SP - 465
EP - 471
BT - Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018
A2 - Powers, Nigel
A2 - Frangopol, Dan M.
A2 - Al-Mahaidi, Riadh
A2 - Caprani, Colin
T2 - 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018
Y2 - 9 July 2018 through 13 July 2018
ER -