Design provisions for crack spacing and width in RC elements externally bonded with FRP |
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| Authors: | Francesca Ceroni Marisa Pecce |
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| Affiliation: | 1. Laboratory of Reinforced Concrete, Department of Civil Engineering, Democritus University of Thrace (DUTh), 67100 Xanthi, Greece;2. Composite Material Research Laboratory, Department of Mechanical Engineering, University of New Orleans, LA 70148, USA;1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;1. Dept. of Structural Engrg. and Geotechnics, Sapienza University of Rome, via A. Gramsci 53, 00197 Rome, Italy;2. Dept. of Civil Engineering, University of Minho, Campus de Azurém, 4810-058 Guimarães, Portugal;1. Department of Structures for Engineering and Architecture, University of Naples Federico II, via Claudio 21, 80125 Napoli, Italy;2. Engineering Department, University of Sannio, Piazza Roma 21, 82100 Benevento, Italy |
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| Abstract: | Verification of serviceability is a key issue in reinforced concrete (RC) elements; for RC elements externally bonded with fibre reinforced plastic (FRP) laminates and sheets cracking phenomena are usually verified by adopting the same approach used for steel RC elements. The available code provisions for crack width and spacing in steel RC elements are reviewed in this paper in order to ascertain the reliability of their application to RC elements strengthened with FRP sheets. Experimental results belonging to test programmes performed by the authors and other researchers on RC elements externally bonded with FRP were compared with existing code provisions in terms of crack width and spacing.A new formula for crack spacing, calibrated on the experimental results, is proposed for use in the expression given by the published version of EC2 for calculating crack width in RC elements externally bonded with FRP. |
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