On the internal blast loading of submerged floating tunnels in concrete with circular and rectangular cross-sections

Tunnel-mooring-train coupled dynamic analysis for submerged floating tunnel under wave excitations

Damage assessment and mitigation measures of underwater tunnel subjected to blast loads

Elastic-slip interface effect on dynamic stress around twin tunnels in soil medium subjected to blast waves

A state-of-the-art review of road tunnel subjected to blast loads

Experimental and numerical studies of tubular concrete structures subjected to blast loading

Hydrodynamic Loads on a Submerged Floating Tube Bridge Induced by a Passing Ship or Two Ships in Maneuver in Calm Water

A submerged floating tube bridge (SFTB) is a bridge hidden below the water surface and thus, able to preserve the landscape and to lower the noise impact on the fjord environment. A twin tube STFB with a main span of 5100 m has been proven to be a feasible, robust, safe and competitive solution to cross the Bjørnafjord. Horizontal stability is ensured by the use of a space frame structure between the tubes, resulting in beam-like construction. Two alternatives have been proposed for the vertical stabilization: tension leg tethers or floating pontoons. The design has undergone rigorous response analyses, proving that the concept has a low sensitivity to changes in the design or the environmental loads. Collisions of submarines on the main tubes or tethers has been evaluated, together with the possibility of a collision of a ship on a pontoon. Fires and explosions have been assessed thoroughly, considering the safety procedures from the preliminary design of the structure. The necessary marine operations for the installation phases have been detailed and the serviceability life for the structure has been analysed together with the maintenance for a safe and robust design. The adaptability and robustness of the structure to the site recalls to the possible application for international similar crossings and the structure shows a high potential in the pre-casting field.

Arianna Minoretti

Papers

On the internal blast loading of submerged floating tunnels in concrete with circular and rectangular cross-sections

Experimental and numerical studies of tubular concrete structures subjected to blast loading

Hydrodynamic Loads on a Submerged Floating Tube Bridge Induced by a Passing Ship or Two Ships in Maneuver in Calm Water

The Submerged Floating Tube Bridge: The invisible bridge crossing the Bjørnafjord

A Submerged Floating Tube Bridge Concept for the Bjørnafjord Crossing: Marine Operations