Economic Design of Steel Bridge Decks with Open Ribs(Mechanics, Strength & Structure Design)

概要

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In order to minimize the cost of welded orthotropic deck bridge structures, optimization studies should be performed, which need mathematical formulation of the cost function. The previously used Pahl-Beelich method is modified by using the COSTCOMP program to have cost functions for various welding methods. Illustrative numerical examples of different welded orthotropic deck bridge structures have been worked out to show the influence of fabrication cost on the optimal sizes of the structure. The analysis of the bridge deck is made by the Pelikan-Esslinger method. Static stress, fatigue, overall and local buckling constraints have been taken into account. It is shown that the optimal sizes depend on welding method, so, to achieve economic structures, the designer should consider also the fabrication aspects. The optimization is made by the Hillclimb method of Rosenbrock in Fortran language on PC.
大阪大学の論文