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Title |
Optimal Strengthening in RC Hollow Slab Bridges Using External Prestressing
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Keywords |
외부 프리스트레싱 ; RC 중공슬래브교 ; 최적보강 External prestressing ; RC hollow slab bridge ; Optimal strengthening |
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Abstract |
In this study, the optimal method is applied to strengthening of RC hollow slab bridges using external prestressing. The Queen-post and King-post shapes are considered to find the effective tendon configurations. In order to achieve the objective rating factor, the optimal configurations and tendon forces are obtained by using the Sequential Unconstrained Minimization Technique (SUMT). The object function for optimal strengthening is constituted with the dimensionless function of material costs. The constraints are formulated by design specification and the rating factor. The validity of this study is presented by the analysis of the results of strengthening of the RC hollow slab bridges.
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