Optimum design of concrete cable-stayed bridges. Issue 5 (3rd May 2016)

• Record Type: Journal Article
• Authors: Martins, Alberto M.B.; Simões, Luís M.C.; Negrão, João H.J.O.
• Is Part Of: Engineering optimization. Volume 48:Issue 5(2016)
• Page Start: 772
• Page End: 791
• Publication Date: 2016-05-03
• Subjects: structural optimization -- concrete cable-stayed bridges -- cable forces -- cross-sectional design variables -- time-dependent effects -- construction stages; Engineering design -- Periodicals; Mathematical optimization -- Periodicals; 620.0042
• DOI: 10.1080/0305215X.2015.1057057
• Languages: English
• ISSNs: 0305-215X

Abstract

Abstract : The design of cable-stayed bridges involves a significant number of design variables and design objectives. The concrete cable-stayed bridge optimization is formulated here as a multi-objective optimization problem with objectives of minimum cost, minimum deflections and minimum stresses. A numerical method is developed to obtain the optimum design of such structures. This numerical method includes: structural analysis, sensitivity analysis and optimization. The structural analysis accounts for all the relevant effects (concrete time-dependent effects, construction stages and geometrical nonlinear effects). The structural response to changes in the design variables is achieved by a discrete direct sensitivity analysis procedure, and an entropy-based approach was used for structural optimization. The features and applicability of the proposed method are demonstrated by numerical examples concerning the optimization of a real-sized concrete cable-stayed bridge.