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Advances in Concrete Construction
  Volume 3, Number 3, September 2015 , pages 161-185

Statistical evaluation of the monotonic models for FRP confined concrete prisms
Farid Hosseinpour and Adel E. Abdelnaby

    FRP confining is a widely used method for seismic retrofitting of concrete columns. Several studies investigated the stress-strain behavior of FRP confined concrete prisms with square and rectangular sections both experimentally and analytically. In some studies, the monotonic stress-strain behavior of confined concrete was investigated and compressive strength models were developed. To study the reliability of these models, thorough statistical tests are required. This paper aims to investigate the reliability of the presented models using statistical tests including t-test, wilcoxon rank sum test, wilcoxon signed rank test and sign test with a level of significance of 5%. Wilk Shapiro test was also employed to evaluate the normality of the data distribution. The results were compared for different cross section and confinement types. To see the accuracy of the models when there were no significant differences between the results, the coefficient of confidence was used.
Key Words
    compressive strength; statistical tests; FRP confined concrete; square and rectangular sections
Farid Hosseinpour and Adel E. Abdelnaby: Department of Civil Engineering, The University of Memphis, Memphis, TN 38152, USA

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