چكيده به لاتين
Enhanced colliding body optimization (ECBO), Vibrating particles system (VPS) and Enhanced Vibrating particles system (EVPS) is used for the design of composite steel floor systems. A parametric study was also presented to investigate the effects of algorithms parameters on Their efficiency. Then, Performance and the convergence rate of these algorithms are compared. The study presents the economical comparison between composite standard I beams, composite asymmetric I beams, composite castellated beams and composite asymmetric castellated beams, designed from standard W sections. Increasing beam capacity by using asymmetric castellated beams is an efficient method to save the costs. Constraints include the application of stress, stability, deflection and vibration limitations according to the load and resistance factor (LRFD) design. the Objective function is the total cost of the floor consisting of the steel profile cost, cutting and welding cost, concrete cost, steel deck cost, shear stud cost and construction costs.
Results show that using asymmetric castellated beams can decrease the total cost of the floor. It can be seen from convergence history diagrams that the convergence rate of the VPS algorithm is higher than that of the ECBO. Anyway, both of VPS and ECBO algorithms can consistently find the optimum floor configuration by minimizing the total cost while satisfying all design criteria.
Keywords:
Enhanced Vibrating particles system (EVPS); Vibrating particles system (VPS); Steel floor systems; Structural optimization; composite asymmetric castellated beams.