Ph.D. Tezi Görüntüleme

      In this study, optimum designs of different steel frame systems are carried out by using genetic algorithm that mimics biological processes. Optimization processes are repeated for the case of considering concrete slab effects on steel beams in finite element analyses. Traditional constraints such as stress, maximum displacement, inter-storey drift and geometric dimensions and dynamic constraints such as natural frequencies or periods are used for the optimizations. A program is developed in MATLAB to carry out practically all these applications. Many different examples are examined to show the validity of the used method. The results obtained from the examples are confirmed by available literature results. According to the results, it is observed that dynamic constraints play active role in optimum designs and taking the effects of concrete slab on steel beams into consideration on the FEM analyses significantly reduces the steel weight in the optimum designs.

      Key Words: Genetic algorithm, Finite element method, Steel frame, Composite beam, Dynamic analysis, Semi-rigid connection, Damage assessment.