Machine learning model for predicting ultimate capacity of FRP-reinforced normal strength concrete structural elements

Limited studies are available on the mathematical estimates of the compressive strength (CS) of glass fiber -embedded polymer (glass-FRP) compressive elements. The present study has endeavored to estimate the CS of glass-FRP normal strength concrete (NSTC) compression elements (glass-FRP-NSTC) employing two various methodologies; mathematical modeling and artificial neural networks (ANNs). The dataset of 288 glass-FRP-NSTC compression elements was constructed from the various testing investigations available in the literature. Diverse equations for CS of glass-FRP-NSTC compression elements suggested in the previous research studies were evaluated employing the constructed dataset to examine their correctness. A new mathematical equation for the CS of glass-FRP-NSTC compression elements was put forwarded employing the procedures of curve-fitting and general regression in MATLAB. The newly suggested ANN equation was calibrated for various hidden layers and neurons to secure the optimized estimates. The suggested equations reported a good correlation among themselves and presented precise estimates compared with the estimates of the equations available in the literature with R2= 0.769, and R2 =0.9702 for the mathematical and ANN equations, respectively. The statistical comparison of diverse factors for the estimates of the projected equations also authenticated their high correctness for apprehending the CS of glass-FRP-NSTC compression elements. A broad parametric examination employing the projected ANN equation was also performed to examine the effect of diverse factors of the glass-FRP-NSTC compression elements.

Automated summary

Limited studies are available on the estimation of compressive strength (CS) of glass fiber-embedded polymer (glass-FRP) compressive elements. This study used mathematical modeling and artificial neural networks (ANNs) to estimate the CS of glass-FRP normal strength concrete (NSTC) compression elements. A dataset of 288 glass-FRP-NSTC compression elements was constructed from various testing investigations in the literature. New mathematical and ANN equations were proposed for estimating the CS, and were found to have good correlation and accurate estimates compared to existing equations in the literature.