Submerged Floating Tunnel: Dynamic response due to earthquakes

The submerged floating tunnel (SFT) is a conceptual idea that originates from the 19th century. The idea consists of a tunnel tube floating underwater where it is kept at a fixed depth by its buoyancy and by tethers that are anchored to the seabed and or by floating pontoons at the water surface. The tunnel is placed deep enough to avoid extreme...