02860nam a2200409 4500 20260818170836.0 010998 th eng .b11722514 AIT Thesis no.ST-98-05 Torregosa, Ribelito F. Optimization of steel frames using genetic algorithms Bangkok : Asian Institute of Technology, 1998 50, A4, B35, C3, D3 leaves Thesis ; no. ST-98-05 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering Thesis (M.Eng.) - Asian Institute of Technology, 1998 Genetic algorithm (GA) is a new technique in optimization procedure that works best in design problems with discrete variables. It employs the survival of the fittest philosophy in determining the optimum combination. Genetic algorithm program was developed using Fortran Programming Language. Test was conducted in order to determine the reliability of the program by optimizing a beam using both exact and GA. Genetic algorithm were used to optimize plane frames under different load cases. Database of steel sizes was provided as the discrete variables. Three different search procedures were tested in the study. These are the elitist without mutation, non-elitist and elitist with mutation search. Different crossover types, population sizes, and crossover probabilities were used and the best method was determined. To examine the performance of genetic algorithms, case studies were conducted and the results obtained were compared with the results from other optimization techniques reported by other authors to some engineering journals. Genetic algorithms Structural frames Mathematical models Worsak Kanok-Nukulchai, Chairperson Gupta, Satyendra P., Examination committee Pennung Warnitchai, Examination Committee Wijeyewickrema, Anil C., Examination committee Royal Thai Government (King's scholarship), Scholarship donor Asian Institute of Technology. Thesis ; no. ST-98-05 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B13146 .b11722514 mnait y 240403 0 980901 m a y 0 mnait mnarc 22 40 Barcode : 30050120660864 CREATED : 2014-02-04 RECORD # : i1278560x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160007042 CREATED : 2016-03-22 RECORD # : i12901532 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 84072 84072 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ST-98-05 30050120660864 2026-08-18 17:08:36 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-98-05 30050160007042 2026-08-18 17:08:36 1 2026-08-18 40