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Structural Engineering and Mechanics Volume 17, Number 5, May 2004 , pages 707-725 DOI: https://doi.org/10.12989/sem.2004.17.5.707 |
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Optimal design using genetic algorithm with nonlinear elastic analysis |
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Seung-Eock Kim, Weon-Keun Song and Sang-Soo Ma
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| Abstract | ||
| An optimal design method with nonlinear elastic analysis is presented. The proposed nonlinear elastic method overcomes the drawback of the conventional LRFD method that accounts for nonlinear effect by using the moment amplification factors of B1 and B2. The genetic algorithm used is a procedure based on Darwinian notions of survival of the fittest, where selection, crossover, and mutation operators are employed to look for high performance ones among sections in the database. They are satisfied with the constraint functions and give the lightest weight to the structure. The objective function taken is the total weight of the steel structure and the constraint functions are strength, serviceability, and ductility requirement. Case studies of a planar portal frame, a space two-story frame, and a three-dimensional steel arch bridge are presented. | ||
| Key Words | ||
| nonlinear elastic analysis; optimal design; genetic algorithm. | ||
| Address | ||
| Seung-Eock Kim; Civil & Environmental Engineering, Construction Tech. Research Institute, Sejong University, Seoul, Korea Weon-Keun Song and Sang-Soo Ma; Korea Infrastructure Safety and Technology Corporation, Korea | ||