Vibration behavior and response to an accidental collision of SFT prototype in Qiandao Lake (China)

This article presents free vibration analysis of the submerged floating tunnel (SFT) prototype, which has been designed to be built in Qiandao Lake (China). As an approximation the supporting effect of the tethers is omitted in the calculation of beam-like bending vibrations. As a case study, the response of the SFT prototype to an accidental collision by an object like a sinking boat is examined. The deformation and the stress of the SFT are computed and the safety assessment is given. Finally, by using the plastic hinge model, the energy absorption capacity of the aluminium alveolate layer is estimated.