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- W235830959 abstract "In this study, a rational optimization algorithm is developed to provide preliminary designs of steel-box girder bridges with optimum construction cost and the sensitivity analysis on various design variables has been performed using the developed optimization program. Due to many advantages, when comparing with other open-section girder types, such as higher torsional rigidity, better resistance against corrosion, the steel-box girder deck is widely adopted for middle and long-span bridges. In current design practice, the design variables of steel-box girder are selected mainly on the basis of engineer's experience and direct observation. Then the assumed sections are checked for design limit states. Therefore, the resulted design sections are doubtful in the optimum viewpoint. To achieve more rational design, systematic design procedure is required. by which the design constraints on steel-box girder are satisfied and the design variables with minimum cost are obtained. In most design practice, design variables are discrete rather than continuous. In the proposed optimum design process, the design variables are forced to be selected from the available discrete value set. The efficiency of the developed program has been verified by designing various examples and the resulting optimum cost with discrete variables has been compared with those of continuous variables. Based on the sensitivity analysis of optimum section, some essential guidelines for rational design of steel-box girder bridges are suggested." @default.
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- W235830959 date "1996-01-01" @default.
- W235830959 modified "2023-09-24" @default.
- W235830959 title "Optimization of Steel Box Girder Bridges Using Discrete Design Variables" @default.
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