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Computers and Concrete
  Volume 26, Number 3, September 2020, pages 293-307

Design-oriented strength and strain models for GFRP-wrapped concrete
Houssem Messaoud, Amar Kassoul and Abdelkader Bougara

    The aim of this paper is to develop design-oriented models for the prediction of the ultimate strength and ultimate axial strain for concrete confined with glass fiber-reinforced polymer (GFRP) wraps. Twenty of most used and recent designoriented models developed to predict the strength and strain of GFRP-confined concrete in circular sections are selected and evaluated basing on a database of 163 test results of concrete cylinders confined with GFRP wraps subjected to uniaxial compression. The evaluation of these models is performed using three statistical indices namely the coefficient of the determination (R2), the root mean square error (RMSE), and the average absolute error (AAE). Based on this study, new strength and strain models for GFRP-wrapped concrete are developed using regression analysis. The obtained results show that the proposed models exhibit better performance and provide accurate predictions over the existing models.
Key Words
    glass fiber-reinforced polymer (GFRP); confined concrete; strength model; strain model; statistical analysis
Houssem Messaoud, Amar Kassoul and Abdelkader Bougara: Laboratory of Structures, Geotechnics and Risks (LSGR), Department of Civil Engineering, Hassiba Benbouali University of Chlef, Algeria

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