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Empirical modeling of shear strength of steel fiber reinforced concrete beams by gene expression programming

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Abstract

The addition of steel fibers into concrete improves the postcracking tensile strength of hardened concrete and hence significantly enhances the shear strength of reinforced concrete reinforced concrete beams. However, developing an accurate model for predicting the shear strength of steel fiber reinforced concrete (SFRC) beams is a challenging task as there are several parameters such as the concrete compressive strength, shear span to depth ratio, reinforcement ratio and fiber content that affect the ultimate shear resistance of FRC beams. This paper investigates the feasibility of using gene expression programming (GEP) to create an empirical model for the ultimate shear strength of SFRC beams without stirrups. The model produced by GEP is constructed directly from a set of experimental results available in the literature. The results of training, testing and validation sets of the model are compared with experimental results. All of the results show that GEP model is fairly promising approach for the prediction of shear strength of SFRC beams. The performance of the GEP model is also compared with different proposed formulas available in the literature. It was found that the GEP model provides the most accurate results in calculating the shear strength of SFRC beams among existing shear strength formulas. Parametric studies are also carried out to evaluate the ability of the proposed GEP model to quantitatively account for the effects of shear design parameters on the shear strength of SFRC beams.

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  1. Department of Civil Engineering, Nigde University, Nigde, Turkey

    Ilker Fatih Kara

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  1. Ilker Fatih Kara
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Correspondence to Ilker Fatih Kara.

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Kara, I.F. Empirical modeling of shear strength of steel fiber reinforced concrete beams by gene expression programming. Neural Comput & Applic 23, 823–834 (2013). https://doi.org/10.1007/s00521-012-0999-x

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  • DOI: https://doi.org/10.1007/s00521-012-0999-x

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