چكيده به لاتين
In the present research we try to solve some design problems of the composite structures using metaheuristic optimization algorithms. Finding the applicable results for the designers is the main aim.
Composite floor optimization and the buckling restrained braces (BRB) optimization are the main objectives of this research. The compressive capacity of the concrete is the good fature of the composite floor systems and it can use for optimizing this type of problems. Also concrete power of confinement is a suitable means for avoiding the buckling in the optimized the braced frames.
By considering stress, deflection, vibration and practical constraints, the composite floor optimization was performed. Performing 99 optimizations and considering stress, drift and low cycle fatigue, reduced length BRB, the optimization is performed.
Results show that for the composite floor, the use of semi rigid connections, castellated beams or both of these, can reduce the structural weight by 25, 30 and 35 percent, respectively. Also selecting a deck with higher price and considering different number of floor divisions can decrease the total cost of the floor.
The results show that by selecting suitable angle and reducing the BRB length, the total cost of the braced frames can be reduced.
