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. Re-sults indicate that the given design approach is suitable for the optimization of the pre-tensioning sequence of arbitrary composite cable-stayed bridges
Optimal Prestress Design of Composite Cable-Stayed Bridges
FRATERNALI, Fernando
2017-01-01
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. Re-sults indicate that the given design approach is suitable for the optimization of the pre-tensioning sequence of arbitrary composite cable-stayed bridgesI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.