Un modello continuo quasi-secante per l'analisi dei ponti strallati di grande luce (in Italian) - A quasi-secant continuous model for the analysis of long-span cable-stayed bridges

In this paper a non-linear continuous model for the statical analysis of long-span cable-stayed bridges with fan scheme and H-shaped towers is proposed. This model is based on a quasi-secant, formulation of the stays-deck interaction, involving quadratic dsplacements, whereas for the girder an Euler-Bernoulli/De Saint Venant approach is employed. The solution of the statical problem, in which flexural and torsional terms are coupled, is obtained by means of a perturbative technique and according to the prevailing truss, structural behaviour. The obtained results for some study-cases are compared with both those relevant to classical models and numerical solutions, proving the effectiveness and the applicability of the proposed model.