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  Challenge Journal of Structural Mechanics (2024) 10(3) 86-94
  Design optimization is an important engineering design topic. One of the important issues in structural design is to minimize the cost. This study based on an engineering problem of Welded Beam Design aims to minimize the cost of the beam with machine learning...
• Optimal metaheuristic design of CFRP wrapping for enhancing the shear capacity of reinforced concrete columns
  Ammar Khalbous, Gebrail Bekdaş, Sinan Melih Nigdeli, Aylin Ece Kayabekir
  Challenge Journal of Structural Mechanics (2026) 12(1) 55-64
  Reinforced concrete (RC) columns are prone to brittle shear failure under lateral loads like earthquakes, especially in older structures. Carbon fiber reinforced polymer (CFRP) wrapping effectively enhances shear capacity, ductility, and energy dissipation. Th...
• Determination of waste crushed baked clay aggregate concrete with granular composite material preparations
  Fatih Şamdan, İbrahim Çelikyürek, Mehmet Canbaz
  Challenge Journal of Concrete Research Letters (2024) 15(4) 112-119
  Waste baked clay is an industrial waste that causes environmental pollution. Therefore, the possible utilization of this material would reduce environmental pollution. Utilization of baked clay as aggregate in concrete would have a positive effect on the econo...
• Decision-making model based multilayer perceptrons for estimation of optimum design properties for truss structure
  Melda Yücel, Gebrail Bekdaş, Sinan Melih Nigdeli
  Challenge Journal of Structural Mechanics (2021) 7(4) 170-179
  Many branches of the structural engineering discipline have many problems, which require the generating an optimum model for beam-column junction area reinforcement, weight lightening for members such a beam, column, slab, footing formed as reinforced concrete...
• Optimum design of reinforced concrete columns employing teaching-learning based optimization
  Gebrail Bekdaş, Sinan Melih Niğdeli
  Challenge Journal of Structural Mechanics (2016) 2(4) 216-219
  In structural engineering, the design of reinforced concrete (RC) structures needs an initial de-sign for cross sectional dimensions. After these dimensions are defined, the design constraints and the required reinforcement bars are calculated. But the require...