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논문 기본 정보

자료유형
학술저널
저자정보
Zhang, Xin (School of Civil Engineering, Zhengzhou University) Qian, Zhanying (Henan Provincial Agency of Quality Supervision for Construction Industry) Chen, Zhen (Henan Provincial Agency of Quality Supervision for Construction Industry) Zeng, Fanna (Henan Provincial Agency of Quality Supervision for Construction Industry)
저널정보
테크노프레스 Wind & structures Wind & structures 제12권 제1호
발행연도
2009.1
수록면
63 - 76 (14page)

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The vortex-induced vibration of an ${\sqcap}$-shaped bridge deck sectional model is studied in this paper via the wind tunnel experiment. The vibratory behavior of the model shows that there is a transition of the predominant vibration mode from the vertical to the rotational degree of freedom as the wind speed increases gradually or vice versa as the wind speed decreases gradually. The vertical vibration is, however, much weaker in the latter case than in the former. This is a phenomenon which is difficult to model by existing parametric models for vortex-induced vibrations. In order to characterize the aeroelastic property of the ${\sqcap}$-shaped sectional model, a time domain force identification scheme is proposed to identify the time history of the aeroelastic forces. After the application of the proposed method, the resultant fluid forces are re-sampled in dimensionless time domain so that reduced frequency response function (RFRF) can be obtained to explore the properties of the vortex-induced wind forces in reduced frequency domain. The RFRF model is proven effective to characterize the correlation between the wind forces and bridge deck motions, thus can explain the aeroelastic behavior of the ${\sqcap}$-shaped sectional model.

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