Experimental and Numerical Study of Carbon Fibre-Reinforced Polymer-Strengthened Reinforced Concrete Beams under Static and Impact Loads

This study aims to investigate the behaviour of reinforced concrete (RC) beams strengthened by Carbon Fibre-Reinforced Polymer (CFRP) under static and impact loads. A series of RC beams were tested and categorized into four groups, namely, unstrengthened RC beams (B1), RC beams strengthened with a C...

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Bibliographic Details
Published inFibers Vol. 12; no. 8; p. 63
Main Authors Mussa, Mohamed H., Mutalib, Azrul A., Hao, Hong
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2024
Subjects
Carbon fiber reinforced concretes
Carbon fiber reinforced plastics
CFRP strengthening
Comparative analysis
Concrete
Cracks
Dynamic loads
Dynamic tests
experimental and numerical study
Failure modes
Fiber reinforced polymers
Impact loads
impact test
Load resistance
Numerical analysis
Numerical models
Polymer industry
Polymers
RC beams
Reinforced concrete
Shear strength
Shear stress
Static loads
Stress concentration
Switzerland
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Summary:This study aims to investigate the behaviour of reinforced concrete (RC) beams strengthened by Carbon Fibre-Reinforced Polymer (CFRP) under static and impact loads. A series of RC beams were tested and categorized into four groups, namely, unstrengthened RC beams (B1), RC beams strengthened with a CFRP longitudinal strip in the tension zone (B2), RC beams wrapped with CFRP fabric (B3), and RC beams strengthened with a combination of both CFRP longitudinal strips and wraps (B4). The results show that the average load–displacement capacity of RC beam group (B4) was improved by 84.88% as compared with the unstrengthened beam (B1) under static loads. The dynamic test results demonstrated an increase in the deflection resistance of RC beam group (B4) by −57.89% as compared with unstrengthened RC beam group (B1) under identical drop weights of 1 m. In addition, a collapse failure mode was noticed in the unstrengthened beams, while minor damage was recorded mainly in the case of RC beam group (B4). Furthermore, the numerical analysis conducted using LS-DYNA software (V 971 R6.0.0) proved that the adopted numerical models can efficiently predict the behaviour of RC beams under dynamic loads, with maximum differences reaching up to −12.5% compared with the experimental test results.
ISSN:2079-6439
2079-6439
DOI:10.3390/fib12080063