Determination of reinforcement diameters of reinforced concrete deep beams with genetic algorithms

Abstract

Genetic algorithms, a stochastic research method, emerged by adapting the development process of biological systems to the computer environment. Operations carried out in genetic algorithms are performed on units stored in computer memory, similar to natural populations. Today, many linear or nonlinear methods have been developed for the solution of optimization problems. Since genetic algorithms are heuristic, they may not find the optimum result for a given problem. However, it gives very close to optimum values for problems that cannot be solved by known methods or whose solution time increases exponentially with the solution of the problem. Genetic algorithms are initially applied to nonlinear optimization problems. In this study, a genetic algorithm was applied to the single-span beam, a single-span beam with a gap in its body. While applying to the genetic algorithm the problems developed back-controlled selection, randomly mixed crossover, double-sensitivity mutation operators, and backward-controlled stopping criterion were used. As a result, developed genetic algorithm operators were applied to the too-big-sized beam problems. These beams' dimensions were too big but they weren’t deep beams according to ACI 318-95 rules.

Keywords: Deep beams; genetic algorithms; reinforcement diameters; selection Operator.