交叉吊索对超大跨CFRP主缆悬索桥静风失稳的抑制作用

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (17) : 177-184.

论文

李翠娟，李永乐，强士中

作者信息 +

The Improvement of Aerostatic Stability of Super Large-span Suspension Bridge with CFRP Cable by Crossed Hangers

Li Cuijuan，Li Yongle，Qiang Shizhong

Author information +

文章历史 +

摘要

大跨度桥梁静风失稳有可能先于动力失稳，且破坏性更强，应予以重视。简单经济的交叉吊索可在基本不增加成本的前提下，有效改善超大跨悬索桥的静风稳定性。本文采用三维非线性分析方法，研究了交叉吊索对超大跨CFRP（Carbon Fibre Reinforced Plastic）主缆悬索桥静风抗力、失稳过程及失稳形态的影响。在提出有助于提高其静风稳定性的交叉吊索最优设置位置的同时，揭示超大跨悬索桥静风失稳机理，并就交叉吊索对静风失稳的抑制作用机理进行了深入研究。研究表明，交叉吊索能有效改善超大跨CFRP主缆悬索桥的静风失稳性能。

Abstract

Aerostatic instability may occur before aerodynamic instability in large span bridge and it is more destructive. So more attention should be paid to it. The aerostatic stability of super large-span suspension bridge can be significantly improved by crossed hanger, which is erected after the completion of whole bridge and costs very little. In this paper, 3D nonlinear Finite Element Method was used to analyze the aerostatic stiffness, aerostatic instability process and the shape of super large-span suspension bridge with CFRP （Carbon Fibre Reinforced Plastic）cable. The best location of putting on crossed hangers for aerostatic stability in suspension bridge and aerostatic instability mechanism have been brought out. The theory of the improvement of aerostatic stability by crossed hangers was clarified also. Through the research of this paper, the wind-resistant behavior of super large-span suspension bridge is improved significantly in the matter of aerostatic stability.

导出引用

李翠娟，李永乐，强士中. 交叉吊索对超大跨CFRP主缆悬索桥静风失稳的抑制作用[J]. 振动与冲击, 2016, 35(17): 177-184

Li Cuijuan，Li Yongle，Qiang Shizhong. The Improvement of Aerostatic Stability of Super Large-span Suspension Bridge with CFRP Cable by Crossed Hangers[J]. Journal of Vibration and Shock, 2016, 35(17): 177-184

参考文献

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