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首页> 外文期刊>Journal of Sound and Vibration >Observations of bridge stay cable vibrations in dry and wet conditions: A case study
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Observations of bridge stay cable vibrations in dry and wet conditions: A case study

机译：干燥湿润条件下桥梁保持电缆振动的观察：案例研究

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摘要

The characteristics of wind-and rain-wind-induced vibrations of bridge stay cables are studied by using ambient vibrations records acquired on a cable-stayed bridge. Mean wind speed and wind-cable angle, as well as the occurrence of rainfalls, were investigated to diagnose a possible excitation mechanism promoting the onset of large heave amplitude oscillations, which were occasionally reported. Light rainfall, mean wind speed values between 8 ms(-1) and 12 ms(-1) and wind-cable angle ranging 45 degrees to 65 °rees were found to be critical conditions for the onset of large amplitude vibrations for the cases at hand. A single mode response (eigenmode 3) associated with reduced velocities around 35 was generally activated during large cable oscillations (peak-to-peak amplitudes of twice the cable diameter) in wet conditions. The simultaneous video camera recordings also contributed to an improved understanding of the upper rainwater rivulet formation and the mechanism of stay cable vibrations in wet state. (C) 2021 The Author(s). Published by Elsevier Ltd.
机译：利用斜拉桥的环境振动记录，研究了斜拉索的风振和雨振特性。研究了平均风速和风缆角度，以及降雨的发生情况，以诊断可能的激发机制，促进大垂荡振幅振荡的发生，偶尔会有报道。研究发现，小雨、8 ms（-1）至12 ms（-1）之间的平均风速值以及45度至65度之间的风缆角度是发生大振幅振动的关键条件。在潮湿条件下的大电缆振动（峰值振幅为电缆直径的两倍）期间，通常会激活与35左右速度降低相关的单模响应（本征模式3）。同时进行的摄像机记录也有助于更好地了解上部雨水溪流的形成以及潮湿状态下斜拉索振动的机理。（c）2021作者。爱思唯尔有限公司出版。

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