Ponte in curva sorretto da gusci anticlastici speculari in cemento armato progettati con l’uso del metodo TNA (Thrust Network Analysis)
Fenu Luigi;Congiu Eleonora;
2017-01-01
Abstract
Since Maillart’s curved arch bridges in concrete, different typologies of curved bridges in both steel and concrete have been constructed. On the contrary, since Musmeci’s shell supported bridge in Potenza, only one significant shell bridge has been designed. In this paper it is shown how to design a curved footbridge supported by an anticlastic concrete shell by shaping the average surface of the shell by means of an auxiliary three-dimensional network of thrust lines (i.e. applying the Thrust Network Analysis method). The paper shows how Thrust Network Analysis (TNA) was applied for shaping the shell in an unconventional way, through exploiting some peculiar characteristics of anticlastic membranes. FEM analysis was finally carried out, showing how shell form is effective in transferring deck loads to foundations, through exploiting concrete mechanical properties by minimizing tensile stresses.File | Dimensione | Formato | |
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