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Computers and Concrete Volume 14, Number 4, October 2014 , pages 479-501 DOI: https://doi.org/10.12989/cac.2014.14.4.479 |
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Shear strength of RC beams. precision, accuracy, safety and simplicity using genetic programming |
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Antoni Cladera, Juan L. Pérez-Ordóñez and Fernando Martínez-Abella
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| Abstract | ||
| This paper presents the improvement of the EC-2 and EHE-08 shear strength formulations for concrete beams with shear reinforcement. The employed method is based on the genetic programming (GP) technique, which is configured to generate symbolic regression from a set of experimental data by considering the interactions among precision, accuracy, safety and simplicity. The size effect and the influence of the amount of shear reinforcement are examined. To develop and verify the models, 257 experimental tests on concrete beams from the literature are used. Three expressions of considerable simplicity, which significantly improve the shear strength prediction with respect to the formulations of the different studied codes, are proposed. | ||
| Key Words | ||
| artificial intelligence; genetic programming; reinforced concrete; shear strength; beams; stirrups; concrete codes | ||
| Address | ||
| Antoni Cladera: Department of Physics, University of the Balearic Islands, Ctra. Valldemossa km. 7.5, E-07122 Palma, Spain Juan L. Pérez-Ordóñez: School of Building Engineering and Technical Architecture, University of A Coruña, Campus de Elviña, E-15192 La Coruña, Spain Fernando Martínez-Abella: Department of Construction Technology, University of A Coruña, Campus de Elviña, E-15192 La Coruña, Spain | ||