Experimental and numerical studies of the vortex-induced vibration behavior of an asymmetrical composite beam bridge

Jx, Wang; Ma, C; Li, Mingshui; Yeung, Ngai; Li, Shaopeng

doi:10.1177/1369433219836851

Cited by 18 publications

(8 citation statements)

References 23 publications

(25 reference statements)

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“…Also, extending wind fairings outward was useful but not practical. Wang et al (2019) studied the VIV performance of girders with asymmetric separation edge-boxes opening girder. And, influence of wind yaw angle, wind attack angle, damping ratio and vehicle was considered.…”

Section: Introductionmentioning

confidence: 99%

Vortex-induced vibration characteristics of two open girders: A comparison of experimental and numerical investigation

Duan

et al. 2022

Advances in Structural Engineering

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Open girder sections are vulnerable to vortex-induced vibrations (VIV) because of their bluff aerodynamic characteristics. A comparative investigation was conducted by wind tunnel tests and numerical simulation. Firstly, based on sectional model wind tunnel tests, the VIV performance of semi-open girder and separated edge-boxes open girder was studied with consideration of the influence of the equivalent mass, wind attack angle and damping ratio. The aerodynamic parameters Scruton number ( S c) and Strouhal number ( S t) of two girders were analyzed contrastively. In addition, VIV amplitudes corresponding to the real bridge girders were calculated by the linear and nonlinear theories. Then, flow fields around two semi-open girder sections were investigated on the basis of computational fluid dynamics. The results show that vertical and torsional VIVs of two open girders are observed, at +3°and +5° wind attack angles. There were two vertical VIV regions and the maximum amplitude in the second vertical VIV region is significantly larger than that in the first one. For the semi-open girder and separated edged-box open girder, the vertical VIV amplitudes at +5° wind attack angle is 115% and 75% larger than at +3° wind attack angle, respectively. The damping ratio could obviously mitigate the VIV of two girders and VIV amplitudes are decreased linearly with the S C number increases. There are vortexes above the girder deck at the opening position of the semi-open girder and the separated edge-boxes open girder. The oblique web and wind faring may break the large vortex into several smaller vortexes at the opening position, thus optimizing the vortex vibration performance of the girder. A thicker shear layer is formed at separated open-girder during the development of airflow towards backward of bridge deck, due to the effect of railings and the blunt boxes on the lower surface.

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Section: Introductionmentioning

confidence: 99%

Vortex-induced vibration characteristics of two open girders: A comparison of experimental and numerical investigation

Duan

et al. 2022

Advances in Structural Engineering

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“…However, because of its low mass, stiffness, and damping, the cable is prone to appear strong lateral vibration under the excitation of wind or the supporting end. Besides, secondary axial flow vibration, vortexinduced vibration behavior, and violent vibration excited by breeze can also be observed in practice [1]. To prevent such undesirable phenomena, plenty of scholars have made indispensable contributions to cable dynamics.…”

Section: Introductionmentioning

confidence: 99%

Modal Interaction-Induced Parametric Resonance of Stayed Cable: A Combined Theoretical and Experimental Investigation

Zhang

Cui

Zhi

et al. 2021

Mathematical Problems in Engineering

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The cable-stayed bridge is widely used due to its strong spanning capacity and navigability. However, flexible cables parametrically resonated by external excitation may result in instability or even damage to the bridge. To prevent such undesirable resonance, this paper discusses an in-plane modal interaction-induced parametric resonance of the stayed cable excited by the bridge deck vibration via nonlinear dynamic analysis. Based on the nonlinear distributed model, two modal governing equations of the cable are established via the Galerkin method. A certain working condition, when the external excitation frequency is close to the second-order natural frequency of the stay cable while nearly twice the first-order natural frequency, is theoretically and experimentally investigated. Specifically, the frequency response equations are obtained by the multiscale method, and the stability of solutions is examined through the Routh Hurwitz criterion. Theoretical and experimental results show that bridge deck vibration can induce not only the primary and superharmonic resonance of the cable but also the principal parametric resonance. Parametric resonance-induced bifurcations are also observed in the system. Particularly, the energy exchange from second-order primary resonance to first-order principal parametric resonance is found, which can induce the parametric resonance with the response amplitude one to three times higher than that of the primary resonance. This paper also validates the superiority of the present modal interaction model over the traditional single-mode model in practical engineering applications.

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“…The occurrence of aeroelastic instabilities may reduce comfort level, cause fatigue, or even safety problems (Dowell et al, 2005;Paı¨doussis et al, 2010). Accurate prediction of aeroelastic instabilities is necessary in the design of a slender bluff body (Li et al, 2020;Tang et al, 2019;Wang et al, 2019). The nonlinear aspect of aeroelastic instabilities has attracted wide attentions in wind engineering community (Amandolese et al, 2013;Ehsan and Scanlan, 1990;Gao and Zhu, 2016, 2020aLarsen, 1995;Marra et al, 2011;Parkinson and Smith, 1964;Ying et al, 2017;Zhu et al, 2013Zhu et al, , 2017, because understanding the mechanism of aerodynamic nonlinearity is an important step toward accurately predicting the vibration response.…”

Section: Introductionmentioning

confidence: 99%

Analytical and experimental study on Van der Pol-type and Rayleigh-type equations for modeling nonlinear aeroelastic instabilities

Gao

Zhu

Bai

et al. 2021

Advances in Structural Engineering

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An empirical modeling of nonlinear aerodynamic force during aeroelastic instabilities, that is, vortex-induced vibration (VIV), galloping and flutter, is necessary in the estimation of vibration responses. Previous works on single-degree-of-freedom (SDOF) models suggest that nonlinear forms (Van der Pol or Rayleigh types) differ from section to section, which causes difficulty in practical application. Analytical evidences in this study have clarified that Van der Pol-type and Rayleigh-type models are equivalent in the amplitude-dependent aerodynamic damping; their difference lies in the higher-order harmonic responses. An identification algorithm of aerodynamic parameters is proposed to improve the robustness of aerodynamic parameters and guarantee the equivalence of both model types. Wind-tunnel tests of typical aeroelastic instabilities indicate that higher-order harmonic responses are small for VIV, galloping, and early-stage flutter instability when compared with the fundamental components due to weak nonlinearity. Van der Pol-type and Rayleigh-type models are both applicable until the flutter amplitude grows excessively large. It is clear that both model types are suitable for any section shape when use the proposed method of aerodynamic identification, and thus can be treated as a universal model for estimating the vibration amplitudes of nonlinear aeroelastic instabilities.

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Experimental and numerical studies of the vortex-induced vibration behavior of an asymmetrical composite beam bridge

Cited by 18 publications

References 23 publications

Vortex-induced vibration characteristics of two open girders: A comparison of experimental and numerical investigation

Vortex-induced vibration characteristics of two open girders: A comparison of experimental and numerical investigation

Modal Interaction-Induced Parametric Resonance of Stayed Cable: A Combined Theoretical and Experimental Investigation

Analytical and experimental study on Van der Pol-type and Rayleigh-type equations for modeling nonlinear aeroelastic instabilities

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