Study on Controlling Index System for Vortex-Induced Vibrations of Long-Span Suspension Bridge with Steel-Concrete Composite Stiffening Girder

被引：0
作者：
Li Y. [1 ]
Zhu J. [1 ]
Wan T. [2 ]
Li H. [1 ]
Qin S. [1 ,2 ]
机构：
[1] Southwest Jiaotong University, Chengdu
[2] China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan
来源：
Bridge Construction | 2024年 / 54卷 / 02期
基金：
中国国家自然科学基金;
关键词：
control index system; load bearing performance of structure; passenger comfort; steel-concrete composite girder; suspension bridge; vehicle travelling alignment; vortex-induced vibration;
D O I：
10.20051/j.issn.1003-4722.2024.02.004
中图分类号：
学科分类号：
摘要：
The long-span suspension bridges are prone to vortex-induced vibrations(VIVs) at service stage. To ensure the safety of existing bridge structures as well as vehicle and passengers travelling safety in the VIVs events, a VIVs controlling index system that takes into account the human comfort, load bearing behaviors of the structure and driving alignment for the long-span suspension bridge with steelconcrete composite stiffening girder is presented. The system incorporates nine indexes, including the driver comfort, motion sickness, passenger comfort (Dieckmann index), as well as bending capacity, stresses, deflection, longitudinal slope and radius of vertical curve of stiffening girder, and stopping sight distance. In the Yingwuzhou Changjiang River Bridge in Wuhan, the limits of VIVs corresponding to the nine indexes were calculated, considering the two traffic control conditions of speed limitation and bridge closure, based on which, the minimum VIVs values were taken as the recommended values. It is shown that the deflection of stiffening girder is a control index in the events of lower-mode vertical vibrationsC VS1 and VAS1), while motion sickness and passenger comfort will take charge in the case of VAS2 modes, and the passenger comfort is also an important control index in the cases of higher-mode vertical VIVs (VAS3 and VAS4). The VIVs control index system and the VIV limits computing framework are applicable to the calculations of VIV limits of different bridge types. © 2024 Wuhan Bridge Media Co., Ltd., MBEC. All rights reserved.
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页码：22 / 30
页数：8
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