大跨度双幅连续钢箱梁桥涡激振动特性风洞试验研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (14) : 206-210.

论文

大跨度双幅连续钢箱梁桥涡激振动特性风洞试验研究

秦浩，廖海黎，李明水

作者信息 +

Study of vortex induced vibration performance for long span continuous steel twin box beam bridge based on wind tunnel test

QIN Hao，LIAO Hai-li，LI Ming-shui

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文章历史 +

摘要

基于崇启大跨度连续梁桥，设计制作大尺度全桥气弹性模型，通过风洞试验对其在均匀流下响应进行研究，确定大跨度双幅钢箱梁连续梁桥涡激振动特性，分析双幅主梁产生两主涡振区机理，模拟外加结构阻尼对涡激振动减振效果。结果可为大跨度双幅钢箱梁连续梁桥抗风设计提供参考。

Abstract

The long span continuous steel beam bridge, which the damping ratio was low and the structure was flexible, was apt to vortex induced vibration. Based on Chongqi long span continuous beam bridge, the large scale aeroelastic model of the completed bridge had been designed and manufactured. By the wind tunnel test, vortex induced vibration in the model, which was under the uniform flow, was observed. Besides, the mechanism that led to two main vortex vibration zones of separate twin box girder was analyzed. Also the additional damping was implemented to reduce the vortex induced vibration. The results provided a reference for the wind-resistant design of large span continuous beam bridge.

导出引用

秦浩;廖海黎;李明水. 大跨度双幅连续钢箱梁桥涡激振动特性风洞试验研究[J]. 振动与冲击, 2014, 33(14): 206-210

QIN Hao;LIAO Hai-li;LI Ming-shui. Study of vortex induced vibration performance for long span continuous steel twin box beam bridge based on wind tunnel test[J]. Journal of Vibration and Shock, 2014, 33(14): 206-210