ABSTRACT
Submerged floating tunnel (SFT) is an innovative structure for strait crossing. However, it faces the risk of collision during operation period, which will be a great threat to the safety of SFT. To improve the safety level of the structure, the high performance fiber concrete (HPFC) was introduced into the SFT design. The numerical simulation was conducted to investigate the dynamic behavior of the high performance fiber concrete tube of the SFT. The modified damaged plasticity concrete model (CDPM), which takes the influence of different fibers in to account, was used to simulate the nonlinear properties of HPFC. Compared with the normal concrete tube, the impact resistance of HPFC tube was studied. The results indicate that the fibers can improve the dynamic performance of the concrete material, such as the dynamic tensile strength and ductility. The HPFC tube shows a better impact resistance than normal concrete section, and it is suitable for SFT structure.
