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通过桥塔气弹模型试验,对斜风作用下港珠澳江海直达船航道桥桥塔自立状态的抖振响应性能进行了分析研究。结果显示桥塔自立状态的抖振响应随风偏角的增加呈非单调变化,塔顶横桥向响应在150°风偏角附近达到最小值,在180°风偏角附近达到最大值,塔顶顺桥向响应在90°风偏角附近达到最大值。塔2/3高处的横桥向和扭转响应也都是在150°风偏角附近达到最小值,在180°风偏角附近响应达到最大值。并且桥塔自立状态下的抖振位移响应曲线随风速的变化近似地呈二次曲线变化。
Through the bridge tower aeroelastic model test, the flutter response performance of the self-standing bridge pylon of the Hong Kong-Zhuhai-Macao Boundary and Pearl River Delta under the inclined wind is analyzed. The results show that the chattering response of the pylon self-sustaining state changes non-monotonically with the increase of the windage angle, and the cross-bridge response at the top of the tower reaches the minimum around the windward angle of 150 ° and reaches the maximum around the windward angle of 180 °. The top-to-bridge response reaches its maximum around the 90 ° windward angle. The transverse bridge and torsional response at 2/3 height of the tower also reached the minimum near 150 ° and the maximum near 180 °. And the response curve of the chattering displacement under the self-standing condition of the bridge tower changes approximately quadratically with the change of the wind speed.