Displacement response of submerged floating tunnel tube due to single moving load

摘要

In this paper, the submerged floating tunnel(SFT) tube is simplified as an elastically supported beam with two springs and dampings at each end. The kinematic equation for SFT tube under a single moving load is established to investigate kinematic problems. By using the Galerkin method, the kinematic equation at the mid-span section of SFT tube can be solved, and the mid-span displacement of SFT tube is gained by numerical simulation method. The influence of anchor stiffness, moving load and moving velocity on SFT tube can be learned about by analyzing the simulation results. The present results indicate that the anchor stiffness plays a significant role in influencing the SFT tube's displacement. At the same time, it also decides the vibration frequency of SFT tube. Moreover, the magnitude and velocity of the single moving load can also have an obvious impact on the tube's mid-span displacement. The research results would provide as a theoretical reference for further study and futural construction of SFT.