Wind-induced response of the arch rib section of an arch bridge in cable hoisting process

GAO Zilong1, PENG Zhihui2, 3, YANG Bokai1, TANG Haojun1, ZHANG Yao2, 3, LI Yongle1

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (18) : 239-247.

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (18) : 239-247.

Wind-induced response of the arch rib section of an arch bridge in cable hoisting process

  • GAO Zilong1,PENG Zhihui2,3,YANG Bokai1,TANG Haojun1,ZHANG Yao2,3,LI Yongle1
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Abstract

The mountainous terrain is complex. Due to the limitation of the construction site, the long-span bridge construction mostly adopts the cable hoisting method with strong spanning ability, but the gentle mechanical properties of the cable system make its wind resistance problem prominent. In order to grasp the wind-induced response characteristics of the arch rib section during the cable hoisting process, this paper takes a concrete-filled steel tube arch bridge in a mountainous area as the object. Firstly, the modal characteristics of the cable hoisting system under no-load and load conditions are studied by finite element analysis, and the dynamic behavior and influencing factors of the arch rib section are discussed. Then the aerodynamic coefficients of different arch rib sections are identified by computational fluid dynamics simulation. Finally, the wind-induced response of the arch rib section during cable hoisting is calculated by transient analysis. The research results show that when the cable hoisting system is in the lifting state, the wind-induced vibration of the lifting rope and the lifting object in the transverse bridge direction and around the vertical axis is obvious. When the hoisting section is moving from the side span to the middle span, the vibration size increases first and then decrease. When the hoisting section drops, the vibration in the other directions decreases except that the vibration in the transverse bridge direction increases.

Key words

arch bridge / erection system / wind induced response / finite element analysis / aerodynamic force

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GAO Zilong1, PENG Zhihui2, 3, YANG Bokai1, TANG Haojun1, ZHANG Yao2, 3, LI Yongle1. Wind-induced response of the arch rib section of an arch bridge in cable hoisting process[J]. Journal of Vibration and Shock, 2024, 43(18): 239-247

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