Optimization of cable-stayed bridges with box-girder decks

• Author(s): Simões, L. M. C. ; Negrão, J. H. J. O.
• Date: 2000
• Persistent ID: http://hdl.handle.net/10316/4042
• Origin: Estudo Geral - Universidade de Coimbra
• Subject(s): Cable-stayed bridges; Optimization; Box-girder decks
• Document Type: Article
• Language: English

Description

Box-girder decks are very effective solutions for long span cable-stayed bridges, due to their high torsional stiffness and streamlined profile, which usually lead to a good aerodynamic behaviour. A study on the optimization of such structural system is presented in this paper. The deck is modelled through the assembly of planes of plate-membrane elements. A multicriteria approach is considered for the optimization itself, with constraints on maximum stresses, minimum stresses in stays and deflections under dead load condition. Two illustrative examples are shown. http://www.sciencedirect.com/science/article/B6V1P-4096248-7/1/70aca7f007d58c643e9a67f5eee9e090