Vortex-induced vibration performance and wind pressure distribution of main girder of long-span suspension bridge affected by temporary facilities

被引：0

作者：

Lang T. ^{[1
]}

Wang H. ^{[1
]}

Jia H. ^{[1
]}

Liu Z. ^{[2
]}

Xu Z. ^{[3
]}

Gao H. ^{[1
]}

机构：

[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing

[2] School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan

[3] Architecture and Civil Engineering School, Inner Mongolia University of Science and Technology, Baotou

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2022年 / 52卷 / 05期

关键词：

proper orthogonal decomposition; temporary facilities; vortex-induced vibration; wind pressure distribution;

D O I：

10.3969/j.issn.1001-0505.2022.05.002

中图分类号：

学科分类号：

摘要：

To investigate the influence of bridge deck temporary facilities on the vortex-induced vibration(VIV)of the main girder, the VIV of a certain long-span suspension bridge was simulated using computational fluid dynamics. The variation of the flow field was studied. The spatial and temporal distribution characteristics of the surface pressure of the main girder under vortex-induced conditions were analyzed using the proper orthogonal decomposition method(POD). The results show that temporary facilities lead to a large vortex in the flow field on the top of the main girder, but the vortex shape is stable without VIV. In the case of vortex-induced vibration of the main girder, separation, reattachment, and shedding in a period of vibration occur in succession at the top vortex. The vibration of the main girder is driven by the evolution of the vortex. The dominant VIV mode exists in the model, and its dominant frequency is in agreement with the natural frequency of the structure. Due to temporary facilities, the surface pressure fluctuation is mainly concentrated in the roof area of the main girder. © 2022 Southeast University. All rights reserved.

引用

页码：833 / 840

页数：7

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