Optimal prestress design of composite cable-stayed bridges. (1st June 2017)

• Record Type: Journal Article
• Authors: Fabbrocino, F.; Modano, M.; Farina, I.; Carpentieri, G.; Fraternali, F.
• Is Part Of: Composite structures. Volume 169(2017)
• Page Start: 167
• Page End: 172
• Publication Date: 2017-06-01
• Subjects: Cable-stayed bridges -- Composite bridges -- Pre-stressing sequence -- Force equilibrium method -- Optimal bridge design; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2016.09.008
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: The present study considers the optimal pre-tensioning design of lattice structures forming composite cable-stayed bridges. With reference to a model problem, a target bending moment distribution over the longitudinal beams is identified, with the aim of achieving an optimized use of the material composing the bridge. Next, a procedure for the optimization of cable forces is developed, in order to achieve the desired bending moment distribution through the application of a self-equilibrated state of stress induced by optimal cable pre-tensioning. Results indicate that the given design approach is suitable for the optimization of the pre-tensioning sequence of arbitrary composite cable-stayed bridges.