将列车－梁－钢塔墩视为一整体振动系统，采用随机振动理论，首先用计算机模拟了货物列车通过天生桥钢塔架高墩（高４３ｍ）全过程，然后从理论上分析了该墩横向振动特性，结果与现场实测吻合较好。由此，讨论高达９０ｍ钢塔架墩横向振动振型及振幅。研究结果表明，抢修钢塔架高墩横向刚度较一般桥墩小，但货物列车限速通过时，仍能保持车轮不脱轨，其运行平稳性良好。 The train-beam-steel tower pier is regarded as a whole vibration system. Based on the theory of stochastic vibration, the whole process of the cargo train passing through the high pier (43m high) of the Tianshengqiao steel tower is simulated by computer. Then, Vibration characteristics, the results with the field measured good agreement. Thus, the horizontal vibration mode and amplitude of 90m steel tower pier are discussed. The results show that the transverse stiffness of high pier repairing steel tower is smaller than that of ordinary piers. However, when the speed limit of cargo train passes, the wheel can still keep the wheels without derailment and the running stability is good.