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        A Discrete Optimization Process for the Design of Horizontal Girders of Rising Sector Gate Using PIAnO

        Kabsoo Lee,Hyuckmoon Gil,Xiaozhe Lu,Young-Doo Kwon 한국강구조학회 2014 International Journal of Steel Structures Vol.14 No.3

        Many small dams have recently been constructed on several major rivers in the Republic of Korea to utilize these waterresources and control water flows. One such water body is the Gangjeong reservoir in the Nakdong River; a rising sector gatewas mounted on this reservoir. The finite element analysis (FEA) confirmed the empirical design of the gate to be safe withminor modifications. However, the positions of the horizontal girders are critical in the design of a gate, and it is must bedetermined by a trial-and-error process. To find the optimal solution for the positions and thicknesses of horizontal girders ina rising sector gate, this paper proposed a new procedure using the commercial optimization package, PIAnO, as well as Pro-Engineer, Hypermesh, and Abaqus. The optimal positions of the horizontal girders are selected from 9 predefined positions. A special technique was developed and applied to change the discrete position set, such as (1, 4, 8) to a continuousdimensionless variable. For this, a FORTRAN program was written to convert the dimensionless variable to a set of positionnumbers, and vice versa.

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