Despite their frequent occurrence in practice, only limited studies on the shear behavior of reinforced concrete (RC) circular\nmembers are available in the literature. Such studies are based on poor assumptions about the physical model, often resulting\nin being too conservative, as well as technical codes that essentially propose empirical conversion rules. On this topic in this\npaper, an evolutionary approach named EPR is used to create a structured polynomial model for predicting the shear strength of\ncircular sections.The adopted technique is an evolutionary data mining methodology that generates a transparent and structured\nrepresentation of the behavior of a system directly from experimental data. In this study experimental data of 61 RC circular\ncolumns, as reported in the technical literature, are used to develop the EPR models. As final result, physically consistent shear\nstrength models for circular columns are obtained, to be used in different design situations. The proposed formulations are\ncompared with models available frombuilding codes and literature expressions, showing that EPR technique is capable of capturing\nand predicting the shear behavior of RC circular elements with very high accuracy. A parametric study is also carried out to evaluate\nthe physical consistency of the proposed models.
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