Optimum design of steel frames with sizing and orientation design variables using a reformulated evolution strategy

Hasançebi O.

STRUCTURES, cilt.52, ss.273-285, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.istruc.2023.04.003
  • Dergi Adı: STRUCTURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.273-285
  • Anahtar Kelimeler: Structural optimization, Metaheuristics, Evolution strategy, Steel frames, Discrete sizing optimization, Optimal selection of column orientations, SPACE FRAMES, SEARCH, OPTIMIZATION, ALGORITHM
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Sizing optimization of steel frame structures has been traditionally conducted based on fixed orientations of structural members. However, it seems more expedient to search for an optimum design where orientations of column members are considered as design variables together with sizing of all members for the minimum weight design of a steel frame. In order to solve the resulting optimization problem effectively, a reformulated evolution strategy (ES) algorithm is proposed and employed in the present study. The numerical investigations are carried out using three test problems regarding the optimum design of steel space frames. In each test problem, a frame is first designed for the minimum weight considering sizing design variables only, where initial orientations of the column members are kept unchanged. Next, sizing and orientation design variables are considered simultaneously for minimizing the weight of the same frame. The results obtained in the foregoing two cases are compared and the associated optimal layouts for the column orientations are depicted. The study reveals that the optimal selection of column orientations has a significant influence on the minimum weight design of steel frames.