Abstract This paper proposes a vortex-induced vibration (VIV) reliability analysis method based on the maximum entropy (MaxEnt) principle in which constraints are specified in terms of fractional moments involving uncertain wind characteristics, structural properties, and bluff-body aerodynamics. The multiplicative dimensional reduction method (M-DRM) is used to calculate the fractional moments. A new threshold is obtained based on the stopping sight distance in the highway engineering technique standard, which is less strict than the China–Japan standard and the British code and thus better-suited to VIV reliability evaluation. A long-span cable-stayed bridge model is used to illustrate the accuracy and efficiency of the proposed method in comparison to Monte Carlo simulation (MCS) on three performance functions of VIV reliability. The results indicate that VIV maximum amplitude and wind speed failure probability are not sensitive to the selected performance function, but the effect of the wind attack angle on probability is significant. The M-DRM provides a workable alternative approach to analyzing the highly complex VIV reliability of long-span bridges.

中文翻译：

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斜拉桥涡激振动可靠性分析：风和空气动力学不确定性

摘要 本文提出了一种基于最大熵（MaxEnt）原理的涡激振动（VIV）可靠性分析方法，该方法根据涉及不确定风特性、结构特性和钝体空气动力学的分数矩来指定约束。乘性降维法（M-DRM）用于计算分数矩。公路工程技术标准中基于停车视距获得了一个新的阈值，该阈值没有中日标准和英国规范那么严格，因此更适合VIV可靠性评估。一个大跨度斜拉桥模型被用来说明所提出的方法与蒙特卡罗模拟 (MCS) 相比，在 VIV 可靠性的三个性能函数上的准确性和效率。结果表明，VIV最大振幅和风速失效概率对所选性能函数不敏感，但风攻角对概率的影响显着。M-DRM 提供了一种可行的替代方法来分析大跨度桥梁高度复杂的 VIV 可靠性。