Abstract
This paper presents an improved version of the big bang-big crunch (BB-BC) algorithm namely exponential BB-BC algorithm (EBB-BC) for optimum design of steel frames according to ASD-AISC provisions. It is shown that the standard version of the algorithm sometimes is unable to provide reasonable solutions for problems from discrete design optimization of steel frames. Therefore, by investigating the shortcomings of the BB-BC algorithm, it is aimed to enhance the algorithm for solving complicated steel frame optimization problems. In order to evaluate the performance of the proposed algorithm, the optimization results attained using the EBB-BC algorithm are compared to those of other well known metaheuristics. The numerical results demonstrate the efficiency and robustness of the proposed algorithm in practical design optimization of steel frames.
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