Numerical analysis of the steel roofing structure of the Umberto I Gallery in Naples

In this paper, the stress level in the steel roofing structure of the Umberto I Gallery in Naples is analysed by using a three dimensional numerical model implemented in a non-linear finite element code. The geometrical and mechanical properties of the structure have been obtained through a wide investigation on available historical documentation. The considered design actions, namely self-load, wind and snow, have been evaluated and combined on the basis of the Eurocode 1 provisions. The numerical results have allowed the actual safety factor respect to the ultimate limit state to be evaluated. In addition, the role played by each member in the overall structural behaviour of the roofing system has been clarified. Finally, some considerations on the structural vulnerability to corrosion damage have been developed.