桥面中央开口悬索桥涡激共振与制涡试验研究

摘 要: 本文研究了中央开口断面悬索桥涡振及其控制风洞试验。考虑了模型涡振幅值和和实桥涡振幅值之间换算的修正系数，风洞试验表明中央开口是导致该种断面形式涡激振动发生的主要原因。所设计的两种制涡方案都能达到控制涡振的目的，在不改变断面形式等因素的前提下，本文设计的制涡方案二能有效控制涡振，符合工程实际要求。同时试验也表明，阻尼能大幅降低涡振幅值。

Vortex-induced vibration of a suspension bridge with central-slotted box section and its control test study

Vortex-induced vibration (VIV) of a suspension bridge with central-slottod box section and its control was studied by use of wind tunnel test. The conversion relationships between the resonant amplitudes of the model and those of the prototype bridge were considered. And the correction coefficients of modal shapes were also presented. Two methods were proposed to control VIV successfully. The second method was able to control VIV effectively under the condition that the section shape was not altered and it could meet the requirements of engineering practice. The test al- so indicated that damping could suppress the amplitudes of VIV notably.