Abstract
A robust and efficient optimization algorithm based on the generalized geometric programming technique has been developed for minimum-weight design of multispan steel plate girders used in highway bridges. Plate girders can be of homogeneous or hybrid construction, using high-strength flange plates and low-strength web plate. The basis of the design is the American Association of State Highway and Transportation Officials (AASHTO) specifications. The plate girders are subjected to live (moving) loads according to AASHTO specifications. The algorithm has been implemented in an interactive FORTRAN-77 program with graphic capabilities.
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