14th European Conference on Earthquake Engineering, 30th Aug. – 3rd Sept., 2010, Republic of Macedonia
G. Martire, B. Faggiano & F.M. Mazzolani, R. Landolfo, A. Zollo & T.A. Stabile
In this paper the seismic behaviour of the Submerged Floating Tunnel (SFT) is investigated. The Submerged Floating Tunnel is an innovative structural solution for the realization of waterway crossings, which features several advantages and seems to be a solution particularly suitable for waterway crossings to be realized in high seismicity zones, thanks to the deformability of the overall structural system. Moreover the interaction with the water provides additional damping and inertia. Time domain dynamic analyses are carried out considering a ground multi-support excitation scenario, being relevant due to the significant distance among the tunnel supports. Synthetic accelerograms are generated by simulating the fault breaking mechanism. Moreover the propagation of vertical ground motion into the water and the fluid-structure interaction are considered. Different structural solutions are considered, mainly differing for the cable system configuration. The dynamic properties of the considered solutions and the main aspects of their structural response are illustrated.
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