ANALIZA WEIBULL A REZISTENȚEI LA IMPACT A BETONULUI AUTOCOMPACTANT RANFORSAT CU CFRP RECICLAT WEIBULL RELIABILITY ANALYSIS OF IMPACT RESISTANCE ON SELF-COMPACTING CONCRETE REINFORCED WITH RECYCLED CFRP PIECES
Revista Română de Materiale / Romanian Journal of Materials
The variations in impact strength of self-compacting concrete reinforced with recycled Carbon Fibre Reinforced Polymer (CFRP) Pieces were examined using Weibull reliability analysis. For this purpose, the experimental results of an earlier research were investigated statistically using the two parameter Weibull distribution. The shape and scale parameter of Weibull distribution function was determined from five statistical methods namely Least-Squares (LS) regression of Y on X, Least-Squares
... X, Least-Squares (LS) regression of X on Y, Empirical Method (EM), Energy Factor Pattern Method (EPM) and Graphical Method (GM). The Weibull parameters were used to describe the impact strengths (number of blows required to cause first crack and failure) in terms of reliability. Further, regression equations were developed between the impact strength and reliability of self-compacting concrete reinforced with recycled CFRP Pieces. In order to validate the developed linear regression equations, six reliable statistical indicators namely Root Mean Square Error (RMSE), Mean Absolute Percentage Error (MAPE), Mean Absolute Deviation (MAD), Integral Absolute Error (IAE), Relative Root Mean Square Error (RRMSE) and Relative Percentage Error (RPE) have been used. Results suggested that the LS-X on Y, EM and EPM are more effective to estimate the Weibull parameters. The developed linear regressions equations which were validated by six statistical indicators show a good fit and higher accuracy.