中文摘要：

针对交叉盾构隧道,考虑混凝土非线性特性,采用混凝土塑性损伤本构模型,在列车轮轨上施加随时间变化的现场实测振动荷载,模拟了列车在隧道中行驶的全过程,分析了速度350 km/h高速列车作用下交叉盾构隧道动力响应与损伤特性。研究表明：列车高速行驶过程中结构的应力与损伤主要集中在隧道中部区域;列车高速行驶于上部隧道时下部隧道受到的应力较小;隧道结构的拉致损伤大小和范围明显大于压致损伤;隧道的压致损伤和拉致损伤主要分布在隧道底部约130°的区域,且拱底位置损伤较大。

英文摘要：

For spatial intersecting shield tunnel,t he field measured vibration load changing with the time was applied on the wheel and rail of the train by considering the nonlinear characteristics of concrete and adopting the plastic damage model of concrete,the train running process in the tunnel was simulated and the dynamic characteristics and damage properties of the intersecting shield tunnel were analyzed under the action of high speed train with350 km /h. Research results show that stress and damage of the structure are mainly concentrated in the middle area of the tunnel during the high speed train traveling,the lower tunnel has less stress when the train is running in the upper tunnel,the tension-induced damage degree and extent of tunnel structure is significantly larger than the compression-induced damage,both damages are mainly distributed at 130° region of the tunnel bottom,and the damage at the arch bottom is relatively large.