Details
| Original language | English |
|---|---|
| Title of host publication | 10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021 |
| Editors | Alper Ilki, Medine Ispir, Pinar Inci |
| Publisher | Springer Science and Business Media Deutschland GmbH |
| Pages | 2267-2276 |
| Number of pages | 10 |
| ISBN (print) | 9783030881658 |
| Publication status | Published - 27 Nov 2021 |
| Externally published | Yes |
| Event | 10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021 - Virtual, Online Duration: 8 Dec 2021 → 10 Dec 2021 |
Publication series
| Name | Lecture Notes in Civil Engineering |
|---|---|
| Volume | 198 LNCE |
| ISSN (Print) | 2366-2557 |
| ISSN (electronic) | 2366-2565 |
Abstract
Among different details in old riveted railway bridges throughout the world, connections such as stringer-to-floor-beam double-angle connections are one of the most fatigue-prone details. These connections are subjected to fatigue loadings due to the secondary out-of-plane deformation. However, there are only few traditional strengthening techniques that are proved to be not so effective in permanently addressing the fatigue issue. In this study, a novel un-bonded prestressed retrofitting solution is proposed for strengthening riveted/bolted steel angle connections. The strengthening system consists of prestressed carbon fiber reinforced polymer (CFRP) rods, which are clamped at the ends using mechanical wedge-barrel anchors. The prestressing force of CFRP rods are transmitted to the strengthened member using the clamps functioning purely by friction. Therefore, an adhesive bonding is not required, and, no damage is imposed to the parent structure. The installation procedure consists of two main stages: presetting the wedges into the barrels, and, prestressing the CFRP rods. For the presetting, a novel method is introduced, making it possible to apply high presetting forces on-site. The application of prestressing force is done by pumping the hydraulic jacks. The static behavior of the strengthening system is experimentally investigated through pull-off tests. In addition, the fatigue behavior of the strengthening system is studied by the laboratory tests on stringer-to-floor-beam double-angle connections. Furthermore, stress distribution in the clamping system and connected parts was analyzed using a Finite Element (FE) model leading to final design of the system.
Keywords
- Finite-element (FE), Post-tensioning, Prestressed CFRP rod, Wedge-barrel anchor
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021. ed. / Alper Ilki; Medine Ispir; Pinar Inci. Springer Science and Business Media Deutschland GmbH, 2021. p. 2267-2276 (Lecture Notes in Civil Engineering; Vol. 198 LNCE).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Development of a Strengthening System for Riveted/Bolted Steel Connections Using Prestressed CFRP Rods
AU - Heydarinouri, H.
AU - Motavalli, M.
AU - Nussbaumer, A.
AU - Ghafoori, E.
N1 - Publisher Copyright: © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2021/11/27
Y1 - 2021/11/27
N2 - Among different details in old riveted railway bridges throughout the world, connections such as stringer-to-floor-beam double-angle connections are one of the most fatigue-prone details. These connections are subjected to fatigue loadings due to the secondary out-of-plane deformation. However, there are only few traditional strengthening techniques that are proved to be not so effective in permanently addressing the fatigue issue. In this study, a novel un-bonded prestressed retrofitting solution is proposed for strengthening riveted/bolted steel angle connections. The strengthening system consists of prestressed carbon fiber reinforced polymer (CFRP) rods, which are clamped at the ends using mechanical wedge-barrel anchors. The prestressing force of CFRP rods are transmitted to the strengthened member using the clamps functioning purely by friction. Therefore, an adhesive bonding is not required, and, no damage is imposed to the parent structure. The installation procedure consists of two main stages: presetting the wedges into the barrels, and, prestressing the CFRP rods. For the presetting, a novel method is introduced, making it possible to apply high presetting forces on-site. The application of prestressing force is done by pumping the hydraulic jacks. The static behavior of the strengthening system is experimentally investigated through pull-off tests. In addition, the fatigue behavior of the strengthening system is studied by the laboratory tests on stringer-to-floor-beam double-angle connections. Furthermore, stress distribution in the clamping system and connected parts was analyzed using a Finite Element (FE) model leading to final design of the system.
AB - Among different details in old riveted railway bridges throughout the world, connections such as stringer-to-floor-beam double-angle connections are one of the most fatigue-prone details. These connections are subjected to fatigue loadings due to the secondary out-of-plane deformation. However, there are only few traditional strengthening techniques that are proved to be not so effective in permanently addressing the fatigue issue. In this study, a novel un-bonded prestressed retrofitting solution is proposed for strengthening riveted/bolted steel angle connections. The strengthening system consists of prestressed carbon fiber reinforced polymer (CFRP) rods, which are clamped at the ends using mechanical wedge-barrel anchors. The prestressing force of CFRP rods are transmitted to the strengthened member using the clamps functioning purely by friction. Therefore, an adhesive bonding is not required, and, no damage is imposed to the parent structure. The installation procedure consists of two main stages: presetting the wedges into the barrels, and, prestressing the CFRP rods. For the presetting, a novel method is introduced, making it possible to apply high presetting forces on-site. The application of prestressing force is done by pumping the hydraulic jacks. The static behavior of the strengthening system is experimentally investigated through pull-off tests. In addition, the fatigue behavior of the strengthening system is studied by the laboratory tests on stringer-to-floor-beam double-angle connections. Furthermore, stress distribution in the clamping system and connected parts was analyzed using a Finite Element (FE) model leading to final design of the system.
KW - Finite-element (FE)
KW - Post-tensioning
KW - Prestressed CFRP rod
KW - Wedge-barrel anchor
UR - http://www.scopus.com/inward/record.url?scp=85121901710&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-88166-5_196
DO - 10.1007/978-3-030-88166-5_196
M3 - Conference contribution
AN - SCOPUS:85121901710
SN - 9783030881658
T3 - Lecture Notes in Civil Engineering
SP - 2267
EP - 2276
BT - 10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021
A2 - Ilki, Alper
A2 - Ispir, Medine
A2 - Inci, Pinar
PB - Springer Science and Business Media Deutschland GmbH
T2 - 10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021
Y2 - 8 December 2021 through 10 December 2021
ER -