中文摘要：

运用大型有限元通用软件ANSYS和钢拱架与混凝土间的粘结滑移退化模型，分析了海底隧道典型初期支护裂缝及钢拱架锈蚀对二次衬砌安全性的影响规律。相对于未开裂前，拱顶开裂造成二次衬砌边墙安全系数最大降幅达5．0％，拱腰开裂造成未开裂侧二次衬砌边墙安全系数最大降幅达15．6％；初期支护承受全部围岩荷载时，钢拱架锈蚀对二次衬砌拱顶安全系数的影响最大，80％锈蚀率时拱顶安全系数降幅为10．0％左右。

英文摘要：

The influence of typical cracks of primary support and steel arch corrosion on the security of secondary lining of subsea tunnel was analyzed by using engineering software ANSYS and a bond-slip and bond degradation model between steel arch and concrete. Compared with the case of no cracks, safety factor of side- wall of the secondary lining dropped by 5.5% for crown cracks, while safety factor of opposite sidewall of secondary lining dropped by 15.6% for wall cracks. If primary support undertakes all surrounding rock load, the influence of steel arch corrosion on safety factor of secondary lining crown will be most serious, and the safety factor will have a 10.0% drop when the steel arch corrosion rate is up to 80%.