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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.24 No.2
- 발행연도
- 2017.1
- 수록면
- 227 - 237 (11page)
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This paper presents optimization of a long-span portal steel frame under dynamic wind loads using a surrogate-assisted evolutionary algorithm. Long-span portal steel frames are often used in low-rise industrial and commercial buildings. The structure needs be able to resist the wind loads, and at the same time it should be as light as possible in order to be cost-effective. In this work, numerical model of a portal steel frame is constructed using structural analysis program (SAP2000), with the web-heights at five locations of I-sections of the columns and rafters as the decision variables. In order to evaluate the performance of a given design under dynamic wind loading, the equivalent static wind load (ESWL) is obtained from a database of wind pressures measured in wind tunnel tests. A modified formulation of the problem compared to the one available in the literature is also presented, considering additional design constraints for practicality. Evolutionary algorithms (EA) are often used to solve such non-linear, black-box problems, but when each design evaluation is computationally expensive (e.g., in this case a SAP2000 simulation), the time taken for optimization using EAs becomes untenable. To overcome this challenge, we employ a surrogate-assisted evolutionary algorithm (SAEA) to expedite the convergence towards the optimum design. The presented SAEA uses multiple spatially distributed surrogate models to approximate the simulations more accurately in lieu of commonly used single global surrogate models. Through rigorous numerical experiments, improvements in results and time savings obtained using SAEA over EA are demonstrated.
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참고문헌 (42)
참고문헌 신청
Adeli, H. / 1996 / Hybrid CPN–neural dynamics model for discrete optimization of steel structures / Comput. -Aided Civil Infra. Eng 11(5):355~366
Musa Artar / 2015 / Optimum design of composite steel frames with semi-rigid connections and column bases via genetic algorithm / Steel and Composite Structures, An International Journal 19(4):1035~1053
Musa Artar / 2015 / Optimum design of steel space frames with composite beams using genetic algorithm / Steel and Composite Structures, An International Journal 19(2):503~519
Zekeriya Aydın / 2015 / Cost minimization of prestressed steel trusses considering shape and size variables / Steel and Composite Structures, An International Journal 19(1):43~58
Begg, D. W. / 1998 / Algorithms for optimal design of smart structural systems / Comput. -Aided Civil Infra. Eng 13(6):415~423
Musa Artar / 2015 / Optimum design of composite steel frames with semi-rigid connections and column bases via genetic algorithm / Steel and Composite Structures, An International Journal 19(4):1035~1053
Musa Artar / 2015 / Optimum design of steel space frames with composite beams using genetic algorithm / Steel and Composite Structures, An International Journal 19(2):503~519
Zekeriya Aydın / 2015 / Cost minimization of prestressed steel trusses considering shape and size variables / Steel and Composite Structures, An International Journal 19(1):43~58
Begg, D. W. / 1998 / Algorithms for optimal design of smart structural systems / Comput. -Aided Civil Infra. Eng 13(6):415~423
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