高速列车通过时跨线钢板梁桥的风致振动及其对策研究

Research of Wind-Induced Vibration of Steel Plate Girder Overhead Bridge and Measures Against Vibration Thereof Due to High-Speed Running Train

日本东静冈车站跨线桥是一座横跨新干线东海道本线的四跨连续钢板梁桥,在架设中,跨度 60 m的第二跨在东海道新干线列车于桥下通过时发生了列车风压作用引起的风致振动。计算了带有雨棚桥面通道的钢板梁桥的结构动力特性,分析了设置小型调质阻尼器(TMD)对抑制桥梁在高速列车通过时由风压引起的振动的有效性,并通过实桥的测量确认了TMD的减振作用。

The overhead bridge at East-Shizuoka Railway Station in Japan is a 4-span continuous steel plate girder bridge crossing Tokaido Line of Shinkansen. During erection of the bridge, the wind-induced vibration due to wind pressure from the high-speed train running beneath took place on the second 60-m span of the bridge. In this paper, the authors calculate the structural dynamic behavior of the steel plate girder bridge with rain shelter, analyze the effectiveness of small type turned mass damper (TMD) used for suppressing the bridge vibration due to the wind pressure from the train and confirm the vibration reduction capacity of the TMD though measurement of the actual bridge.