Nonlinearity of mechanical damping of a spring-suspended sectional model system and its influence on the vortex-induced vibration response of a bridge deck

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-03-26 DOI:10.1016/j.jweia.2025.106088

Weimeng Ma , Zhiwen Huang , Xugang Hua , Zhengqing Chen

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引用次数: 0

Abstract

This paper investigates the nonlinear characteristics of additional damping provided by various damping adjustment methods or devices and the effects of nonlinear mechanical damping of spring-suspended sectional model (SSSM) systems on the vortex-induced vibration (VIV) responses of bridge decks. First, the characteristics of the additional damping provided by three commonly used damping adjustment methods, such as winding electrical tape on the coil springs, installing eddy current dampers, and tying wire rope rings on the coil springs, to the SSSM systems are studied through free vibration tests. Among these methods, the additional damping provided by tying wire rope rings has the strongest nonlinearity, and the stability of the additional damping provided by winding electrical tape is the worst. Next, based on a wake oscillator model, the effects of the nonlinearity of the structural damping on the lock-in regions and maximum VIV amplitudes of different bridge decks are analyzed. Finally, a method for defining the nominal value of the structural damping ratio is proposed, which effectively mitigates the influence of the nonlinearity of the structural damping on the prediction of the maximum VIV amplitude of a main girder, and its rationality is verified through wind tunnel tests.

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弹簧悬挂式断面模型系统机械阻尼的非线性及其对桥面涡流诱发振动响应的影响

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来源期刊

Journal of Wind Engineering and Industrial Aerodynamics 工程技术-工程：土木

CiteScore

8.90

自引率

22.90%

发文量

306

审稿时长

4.4 months

期刊介绍： The objective of the journal is to provide a means for the publication and interchange of information, on an international basis, on all those aspects of wind engineering that are included in the activities of the International Association for Wind Engineering http://www.iawe.org/. These are: social and economic impact of wind effects; wind characteristics and structure, local wind environments, wind loads and structural response, diffusion, pollutant dispersion and matter transport, wind effects on building heat loss and ventilation, wind effects on transport systems, aerodynamic aspects of wind energy generation, and codification of wind effects. Papers on these subjects describing full-scale measurements, wind-tunnel simulation studies, computational or theoretical methods are published, as well as papers dealing with the development of techniques and apparatus for wind engineering experiments.