Optimum Design of Prestressed Concrete Plank Girder Using Hill Climbing Algorithm
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Abstract
This research presents an application of a hill climbing algorithm for optimum design of prestressed concrete plank girders in order to determine the design parameters based on the Engineering Institute of Thailand standard, E.I.T. 1009-34, 2553 by strength design method for trucks HS20 - 44 according to AASHTO LRFD 1992 standards. The algorithm was developed using Microsoft Visual Basic 6.0 and it was tested with 3 frequently-used examples. The examples are single-span with the simply supported varied by length of girders. The objective function is to find the lowest price. The design variable consists of the strength of concrete (fc’) Yield strength of reinforcement steel (fy) Ultimate strength of prestressing strand (fpu) Sizes and quantities of reinforcing steel, Prestressing strand and the cross-sectional area of plank girder. The statistical analysis revealed that the design of prestressed concrete plank girders by the hill climbing algorithm gave 11.17 % cheaper than when applying traditional methods.
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References
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