The Reinforcing Effect of Nano-Modified Epoxy Resin on the Failure Behavior of FRP-Plated RC Structures
The ability to manipulate concrete-based and composite materials at the nanoscale represents an innovative approach to improving their mechanical properties and designing high-performance building structures. In this context, a numerical investigation of the reinforcing effect of nano-modified epoxy...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/5/1139 |
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| author | Umberto De Maio Daniele Gaetano Fabrizio Greco Paolo Lonetti Paolo Nevone Blasi Andrea Pranno |
| author_facet | Umberto De Maio Daniele Gaetano Fabrizio Greco Paolo Lonetti Paolo Nevone Blasi Andrea Pranno |
| author_sort | Umberto De Maio |
| collection | DOAJ |
| description | The ability to manipulate concrete-based and composite materials at the nanoscale represents an innovative approach to improving their mechanical properties and designing high-performance building structures. In this context, a numerical investigation of the reinforcing effect of nano-modified epoxy resin on the structural response of fiber-reinforced polymer (FRP)-plated reinforced concrete (RC) components has been proposed. In detail, an integrated model, based on a cohesive crack approach, is employed in combination with a bond–slip model to perform a failure analysis of strengthened structures. In particular, the proposed model consists of cohesive elements located on the physical interface between concrete and FRP systems equipped with an appropriate bond–slip law able to describe the reinforcing effect induced by the incorporation of nanomaterials in the bonding epoxy resin. Preliminary analyses, performed on reinforced concrete prisms, highlight an increment of 28% in the bond strength between concrete and the FRP system, offered by the nanomaterials embedded in the adhesive layer with respect to the standard one. Moreover, the numerically predicted structural response of a nano-modified FRP-plated beam shows an increment of around 5.5% in the failure load and a reduction in the slip between concrete and the FRP plate of around 76%, with respect to the reinforced beam without nanomaterial incorporation. Finally, the good agreement with experimental results, taken from the literature, highlights the excellent capability of the proposed model to simulate the mechanical behavior of such types of reinforced structures, emphasizing the beneficial effects of the nano-enhanced epoxy resin on the bond strength between concrete and FRP systems. |
| first_indexed | 2024-03-11T03:54:20Z |
| format | Article |
| id | doaj.art-fd3a7a777e264333ab717369ea0ac062 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T03:54:20Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-fd3a7a777e264333ab717369ea0ac0622023-11-18T00:44:05ZengMDPI AGBuildings2075-53092023-04-01135113910.3390/buildings13051139The Reinforcing Effect of Nano-Modified Epoxy Resin on the Failure Behavior of FRP-Plated RC StructuresUmberto De Maio0Daniele Gaetano1Fabrizio Greco2Paolo Lonetti3Paolo Nevone Blasi4Andrea Pranno5Department of Civil Engineering, University of Calabria, 87036 Rende, ItalyDepartment of Civil Engineering, University of Calabria, 87036 Rende, ItalyDepartment of Civil Engineering, University of Calabria, 87036 Rende, ItalyDepartment of Civil Engineering, University of Calabria, 87036 Rende, ItalyDepartment of Civil Engineering, University of Calabria, 87036 Rende, ItalyDepartment of Civil Engineering, University of Calabria, 87036 Rende, ItalyThe ability to manipulate concrete-based and composite materials at the nanoscale represents an innovative approach to improving their mechanical properties and designing high-performance building structures. In this context, a numerical investigation of the reinforcing effect of nano-modified epoxy resin on the structural response of fiber-reinforced polymer (FRP)-plated reinforced concrete (RC) components has been proposed. In detail, an integrated model, based on a cohesive crack approach, is employed in combination with a bond–slip model to perform a failure analysis of strengthened structures. In particular, the proposed model consists of cohesive elements located on the physical interface between concrete and FRP systems equipped with an appropriate bond–slip law able to describe the reinforcing effect induced by the incorporation of nanomaterials in the bonding epoxy resin. Preliminary analyses, performed on reinforced concrete prisms, highlight an increment of 28% in the bond strength between concrete and the FRP system, offered by the nanomaterials embedded in the adhesive layer with respect to the standard one. Moreover, the numerically predicted structural response of a nano-modified FRP-plated beam shows an increment of around 5.5% in the failure load and a reduction in the slip between concrete and the FRP plate of around 76%, with respect to the reinforced beam without nanomaterial incorporation. Finally, the good agreement with experimental results, taken from the literature, highlights the excellent capability of the proposed model to simulate the mechanical behavior of such types of reinforced structures, emphasizing the beneficial effects of the nano-enhanced epoxy resin on the bond strength between concrete and FRP systems.https://www.mdpi.com/2075-5309/13/5/1139nano-modified epoxy resinnanomaterialsstrengthened structurescohesive zone modelfinite element modeling |
| spellingShingle | Umberto De Maio Daniele Gaetano Fabrizio Greco Paolo Lonetti Paolo Nevone Blasi Andrea Pranno The Reinforcing Effect of Nano-Modified Epoxy Resin on the Failure Behavior of FRP-Plated RC Structures Buildings nano-modified epoxy resin nanomaterials strengthened structures cohesive zone model finite element modeling |
| title | The Reinforcing Effect of Nano-Modified Epoxy Resin on the Failure Behavior of FRP-Plated RC Structures |
| title_full | The Reinforcing Effect of Nano-Modified Epoxy Resin on the Failure Behavior of FRP-Plated RC Structures |
| title_fullStr | The Reinforcing Effect of Nano-Modified Epoxy Resin on the Failure Behavior of FRP-Plated RC Structures |
| title_full_unstemmed | The Reinforcing Effect of Nano-Modified Epoxy Resin on the Failure Behavior of FRP-Plated RC Structures |
| title_short | The Reinforcing Effect of Nano-Modified Epoxy Resin on the Failure Behavior of FRP-Plated RC Structures |
| title_sort | reinforcing effect of nano modified epoxy resin on the failure behavior of frp plated rc structures |
| topic | nano-modified epoxy resin nanomaterials strengthened structures cohesive zone model finite element modeling |
| url | https://www.mdpi.com/2075-5309/13/5/1139 |
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