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contributor authorM. Z. Cohn
contributor authorZ. Lounis
date accessioned2017-05-08T20:55:40Z
date available2017-05-08T20:55:40Z
date copyrightSeptember 1994
date issued1994
identifier other%28asce%290733-9445%281994%29120%3A9%282653%29.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/32062
description abstractSuperstructure design of short‐ and medium‐span highway bridge systems may be conceived as a process of multilevel and multiobjective optimization. Three optimization levels are identified: (1) Level 1—component optimization; (2) level 2—structural configuration optimization; and (3) level 3—overall system optimization. Designs may be optimized by separately or simultaneously considering one, two, or more of the following objectives: cost, prestressing steel or concrete consumption, and superstructure depth. The optimal solution may be found by a sequence of nonlinear programming and sieve‐search techniques. Levels 1 and 2 optimizations identify the best solutions for specific components (precast I‐girders, voided and solid slabs, single‐ and two‐cell box girders) and layouts (for precast I‐girder: one, two, and three; simple or continuous spans). Level 3 optimization selects the overall best system for given bridge lengths, widths, and traffic loadings. The present study results in: (1) A systematic procedure for bridge design; (2) a rational approach to optimization of standard precast sections; (3) direct design aids for selection of optimized bridge systems; and (4) simplified optimality criteria for preliminary design.
publisherAmerican Society of Civil Engineers
titleOptimal Design of Structural Concrete Bridge Systems
typeJournal Paper
journal volume120
journal issue9
journal titleJournal of Structural Engineering
identifier doi10.1061/(ASCE)0733-9445(1994)120:9(2653)
treeJournal of Structural Engineering:;1994:;Volume ( 120 ):;issue: 009
contenttypeFulltext


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