Details
| Original language | English |
|---|---|
| Pages (from-to) | 974-984 |
| Number of pages | 11 |
| Journal | Composite structures |
| Volume | 207 |
| Publication status | Published - 1 Jan 2019 |
| Externally published | Yes |
Abstract
In recent years, retrofitting of steel structures has emerged as a major issue in structural engineering and construction management. As the adhesive bond is often the critical aspect controlling the actual performance of steel profiles externally strengthened by composite plates, this paper investigates the bond behavior of fiber reinforced polymer (FRP) composites glued to steel substrate; the effect of prestress, being relevant in practical applications, is also covered herein. A simplified mechanical model, based on assuming mode II fracture for FRP-to-steel debonding is formulated at first, and then, a numerical solution is implemented. The proposed solution is validated by experimental tests. Finally, a parametric study highlights the role of several relevant parameters on the response of carbon FRP plates under prestress-release tests; it paves the way for further developments of the present study aimed to predict the prestress force release and lap-shear behavior of FRP-to-steel bonded joints based on the mechanical properties of the materials and the bond-slip relationship assumed for the adhesive interface.
Keywords
- Debonding, FRP, Lap-shear test, Numerical modeling, Prestress release, Steel
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- Civil and Structural Engineering
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In: Composite structures, Vol. 207, 01.01.2019, p. 974-984.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Behavior of prestressed CFRP plates bonded to steel substrate
T2 - Numerical modeling and experimental validation
AU - Martinelli, Enzo
AU - Hosseini, Ardalan
AU - Ghafoori, Elyas
AU - Motavalli, Masoud
N1 - Funding Information: The authors gratefully acknowledge the financial support provided by the Swiss National Science Foundation (SNSF Project No. 200021-153609). The authors would like to thank the technicians of the Structural Engineering Research Laboratory of Empa for their outstanding cooperation in performing the experimental tests. Furthermore, supports from S&P Clever Reinforcement Company AG, Switzerland through the provision of the materials used in the current study is acknowledged. Publisher Copyright: © 2018 Elsevier Ltd
PY - 2019/1/1
Y1 - 2019/1/1
N2 - In recent years, retrofitting of steel structures has emerged as a major issue in structural engineering and construction management. As the adhesive bond is often the critical aspect controlling the actual performance of steel profiles externally strengthened by composite plates, this paper investigates the bond behavior of fiber reinforced polymer (FRP) composites glued to steel substrate; the effect of prestress, being relevant in practical applications, is also covered herein. A simplified mechanical model, based on assuming mode II fracture for FRP-to-steel debonding is formulated at first, and then, a numerical solution is implemented. The proposed solution is validated by experimental tests. Finally, a parametric study highlights the role of several relevant parameters on the response of carbon FRP plates under prestress-release tests; it paves the way for further developments of the present study aimed to predict the prestress force release and lap-shear behavior of FRP-to-steel bonded joints based on the mechanical properties of the materials and the bond-slip relationship assumed for the adhesive interface.
AB - In recent years, retrofitting of steel structures has emerged as a major issue in structural engineering and construction management. As the adhesive bond is often the critical aspect controlling the actual performance of steel profiles externally strengthened by composite plates, this paper investigates the bond behavior of fiber reinforced polymer (FRP) composites glued to steel substrate; the effect of prestress, being relevant in practical applications, is also covered herein. A simplified mechanical model, based on assuming mode II fracture for FRP-to-steel debonding is formulated at first, and then, a numerical solution is implemented. The proposed solution is validated by experimental tests. Finally, a parametric study highlights the role of several relevant parameters on the response of carbon FRP plates under prestress-release tests; it paves the way for further developments of the present study aimed to predict the prestress force release and lap-shear behavior of FRP-to-steel bonded joints based on the mechanical properties of the materials and the bond-slip relationship assumed for the adhesive interface.
KW - Debonding
KW - FRP
KW - Lap-shear test
KW - Numerical modeling
KW - Prestress release
KW - Steel
UR - http://www.scopus.com/inward/record.url?scp=85055891484&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2018.09.023
DO - 10.1016/j.compstruct.2018.09.023
M3 - Article
AN - SCOPUS:85055891484
VL - 207
SP - 974
EP - 984
JO - Composite structures
JF - Composite structures
SN - 0263-8223
ER -