拱桥拱肋段缆索吊装状态时的风致响应研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (18) : 239-247.

论文

拱桥拱肋段缆索吊装状态时的风致响应研究

高子龙1，彭志辉2,3，杨博开1，唐浩俊1，张耀2,3，李永乐1

作者信息 +

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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文章历史 +

摘要

山区地形地貌复杂，受施工场地的限制，大跨桥梁施工多采取跨越能力强的缆索吊装法，但缆索系统轻柔的力学特性使其抗风问题突出。为掌握拱肋段缆索吊装过程中的风致响应特性，本文以某山区钢管混凝土拱桥为对象，首先通过有限元分析研究了缆索吊装体系在空载和吊重状态下的模态特性，讨论了拱肋段的动力学行为及影响因素；然后通过计算流体力学仿真模拟识别了不同拱肋段的气动力系数；最后通过瞬态分析计算了拱肋段缆索吊装状态时的风致响应。研究结果表明，当缆索吊装系统吊重状态时，起吊索和吊重物在横桥向和绕竖轴扭转的风致振动现象明显。当吊装段由边跨向跨中行进时，其振动大小呈先增大后减小趋势；当吊装段下降时，除横桥向振动增大外，其余方向的振动均有所减小。

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.

导出引用

高子龙1, 彭志辉2, 3, 杨博开1, 唐浩俊1, 张耀2, 3, 李永乐1. 拱桥拱肋段缆索吊装状态时的风致响应研究[J]. 振动与冲击, 2024, 43(18): 239-247

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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