1.Guangdong Provincial Highway Construction Co., Ltd., Guangzhou 510100, China;
2.Guangdong Greater Bay Area Transportation Construction Investment Co., Ltd., Guangzhou 510100, China;
3.CCCC Highway Bridge National Engineering Research Centre Co., Ltd., Beijing 100088, China
Abstract:A vibration analysis method for single-side juxtaposition dual main cables of four-main-cable suspension bridges considering the three-dimensional effect of the main cables, the aerodynamic interference effect between the main cables and the two-way fluid-structure coupling effect under the action of uniform flow is established. For the single-span suspension bridge with four main cables with a main span of 2180m, the lateral vibration of the mid-span main cables and the lateral and vertical vibration of the side-span main cables under the action of uniform flow are carried out. The results show that: for the mid-span main cables, the average displacement of the main cable increases with the increase of wind speed. The main cable performs simple harmonic vibration near the average displacement. The frequency of vibration is related to the wind speed. There is no contact between the cables; for the side span main cables, the main cable on the leeward side has the phenomenon of wake galloping. Under specific wind angle of attack, the main cable on the windward side may also have galloping vibration.
张太科1,2,陈上有3,刘高3,杨佐磊3. 均匀流作用下悬索桥单侧并置双主缆振动特性分析[J]. 振动与冲击, 2023, 42(18): 123-129.
ZHANG Taike1,2,CHEN Shangyou3,LIU Gao3,YANG Zuolei3. Analysis of the vibration characteristics of a suspension bridge with single-side juxtaposition dual main cables under the effect of uniform flow. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(18): 123-129.
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