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Statical behaviour of long-span cable-stayed bridges. (English) Zbl 0579.73074
Summary: The aim of this study is to examine the statical behaviour of the long- span cable-stayed bridge with fan scheme by means of a suitable continuous model. The given solution of the statics basic equations of the model focalizes a prevailing truss behaviour of the bridge. This solution in fact - developed according to the perturbative technique - gives as the generating term the ”truss solution” of the bridge and, as correction terms - of higher order in the perturbative parameter - the local bending effects on the girder. According to this solution it is possible to achieve a synthetic understanding of the statical behaviour of the bridge and to express, by simple formulas, the more interesting required quantities. The obtained results are checked with some numerical solutions obtained via finite element methods that confirm the soundness of the proposed model.
MSC:
74E30Composite and mixture properties