以大西客运专线上跨朔黄铁路特大桥为依托工程,通过对其转体施工过程中振动监测数据及有限元模拟结果的对比分析,研究结构转体过程中的振动规律。结果表明,依托工程转体结构的振动基本只受处于垂直于其横桥向的平面内的前三阶振型影响。其中对称振型对墩底弯矩无贡献,剩下的两阶反对称振型对墩底弯矩的贡献大致在同一数量级上。 Based on the project of the Trans-Shuohuang Railway Bridge on the West-Passenger Dedicated Railway, the vibration law during the swivel of the structure is studied through the comparative analysis of the vibration monitoring data and the finite element simulation results during the swivel construction. The results show that the vibration of the swivel structure depends basically on the first three modes in the plane perpendicular to its transverse direction. Among them, the symmetrical modes do not contribute to the moment of abutment, and the contribution of the remaining two modes of anti-symmetry to the moment of abutment is about the same order of magnitude.