摘要
大型钢制桥塔其风振特点与常规混凝土桥塔有较大差异,国内有关钢桥塔风振研究较少。通过对钢桥塔横风向驰振传统计算方法的简单论述,指出了传统计算方法的不足之处,提出了考虑非准定常效应计算驰振响应的方法。
There are great differences in the vibration characteristics induced by wind between large steel bridge tower and concrete bridge towers. However, the domestic studies on wind-induced vibration are few. With a simple exposition of traditional calculation method considering the cross-wind galloping of steel bridge tower, the inadequacy of the method is pointed out. Then, a new method calculating the galloping responses, which considers the effect of non-quasi-steady, is put forward.
关键词
钢桥塔
驰振
颤振导数
临界风速
非准定常效应
steel bridge tower
galloping
flutter derivatives
critical wind speed
non-quasi-steady effect
