中俄东线长江盾构隧道内钢架结构计算
Calculation of Steel Frame Structure in Yangtze River Shield Tunnel of China Russia East Line

中俄东线盾构隧道穿越为该线控制性工程，隧道内需设置用于管片运输、管道安装和混凝土运输的钢架结构。为模拟钢架结构的最不利荷载工况，确保钢架结构稳定性和车辆运行安全性，本文利用ANSYS建立了参数化、精细化钢架有限元模型，采用逐步加载法(单车行驶、多车并行)和移动荷载法对钢架结构进行计算分析。结果表明：1) 荷载过钢架时，钢架#4轨道跨中为荷载最不利位置，多车并行对钢架结构受力变形最大值影响不大，可按轨道单车行驶进行计算；2) 钢架结构在荷载作用下受力变形均满足规范要求，但应关注刹车时钢架结构的纵向侧移；3) 钢架结构整体刚度较大，行车速度较低，不会发生共振现象，车辆冲击效应不显著。
The shield tunnel crossing of China Russia east line is a control project of the line, and the steel frame structure used for segment transportation, pipeline installation and concrete transporta-tion should be set in the tunnel. In order to simulate the most unfavorable load conditions of steel frame structure and ensure the stability of steel frame structure and the safety of vehicle operation, a parameterized and refined finite element model of steel frame is established by using ANSYS, and the calculation and analysis of steel frame structure are carried out by using step-by-step loading method (single vehicle driving, multi vehicle parallel) and moving load method. The results show that: 1) when the load passes through the steel frame, the middle of the steel frame #4 track span is the most unfavorable position for the load, and the multi vehicle parallel has little effect on the maximum stress and deformation of the steel frame structure, which can be calculated as a single vehicle running on the track; 2) The stress and deformation of the steel frame structure under the action of load meet the requirements of the code, but the longitudinal lateral displacement of the steel frame structure during braking should be paid attention to; 3) The overall stiffness of the steel frame structure is large, the driving speed is low, the resonance phenomenon will not occur, and the vehicle impact effect is not significant.