大跨高低塔斜拉桥抗风性能试验研究

摘要:

为了研究大跨高低塔斜拉桥抗风性能,以顺德斜拉桥为工程背景,通过节段模型风洞试验研究桥梁的涡振、颤振性能,并分析桥梁的静风响应性,研究发现：较小的风嘴有利于抑制和减小流线型箱梁的涡振振幅,且不影响颤振稳定性；大桥静风响应随风速变化具有显著的非线性特点,来流风攻角对静风响应影响较小。该研究可为大跨高低塔斜拉桥抗风性能研究提供科学依据和参考。

Abstract:

In order to study the wind resistant performance of long-span cable-stayed bridges with unequal pylons, taking Shunde cable-stayed bridge of unequal pylons as engineering background, it’s vortex-induced vibration and flutter performance was studied through the sectional model test, smaller fairing is beneficial to suppress and reduce vortex-induced vibration amplitude of streamlined box girder, and does not affect flutter stability. And the static wind stability performance of the bridge is analyzed, the deformation of the bridge varies with the wind speed present significant nonlinearity, and the wind attack angle of oncoming flow has little influence on the static wind response. The research can provide scientific basis and reference for the wind resistant research of long-span cable-stayed bridges with unequal pylons.