Aerodynamic Problems of a Super-long Span Cable-stayed Bridge

Chen, Airong; You, Qingzhong; Zhang, Xigang; Ma, Rujin; Zhou, Zhiyong

doi:10.2749/222137805796271549

Cited by 8 publications

(2 citation statements)

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“…The aerodynamic admittance function is omitted because it is not available from the wind-tunnel testing. The flutter derivatives of the SCB were measured by wind-tunnel tests at Tongji University (Chen et al, 2005), and the self-excited aerodynamic forces acting on the bridge deck are modeled with the element Matrix 27 in ANSYS (Hua et al, 2007). The other procedures used to analyze structural buffeting responses have been illustrated by Wang et al (2011).…”

Section: Buffeting Analysis Methodsmentioning

confidence: 99%

A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers

Wang

Tao

Cheng

et al. 2014

J. Zhejiang Univ. Sci. A

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The buffeting of long-span cable-supported bridges under strong winds is one of the key issues in bridge wind engineering. In order to study the effectiveness of the multiple tuned mass dampers (MTMDs) in buffeting control of long-span bridges, the Sutong Cable-stayed Bridge (SCB) with a main span of 1088 m in China is taken as an example in this paper. The spatial finite element model of the SCB is established and the modal analysis is conducted based on ANSYS. After the 3D turbulence wind field of the SCB is simulated using the measured wind parameters, the time-domain buffeting analysis on the SCB is conducted with the aerodynamic self-excited forces included. According to the dynamic characteristics and the time-domain buffeting analysis results of the SCB, the parameter sensitivity analysis on buffeting vibration control with MTMD is conducted in ANSYS. The optimum parameters are then obtained with the construction difficulty and economic factors considered. Results show that the control efficiency is sensitive to the number of the TMD, mass ratio, frequency band-width ratio, and damping ratio. Both the vertical and the lateral vibrations can be effectively controlled when proper design parameters of a MTMD system are used. In addition, the control effect on lateral vibration is better than that on vertical vibration. Results obtained in this study can provide references for anti-wind design and buffeting control of long-span cable-stayed bridges.

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Section: Buffeting Analysis Methodsmentioning

confidence: 99%

A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers

Wang

Tao

Cheng

et al. 2014

J. Zhejiang Univ. Sci. A

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“…Meantime the deck cross-sections of almost all long cable-stayed bridges were optimized from an aerodynamic point of view. The cross-section of the Sutong Bridge was chosen after various wind tunnel tests associated with aerodynamic instability (Chen et al, 2005). For the design of the Stonecutter Bridge, a twin box girder deck with a wide clear separation of 14.3 m was adopted, with which stability against flutter during both construction and in-service stages could be anticipated (critical 1-min wind speed higher than 95 m/s) (Larose et al, 2003).…”

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confidence: 99%

Toward Better Understanding of Turbulence Effects on Bridge Aerodynamics

Cao

2017

Front. Built Environ.

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With the trend of variable cross-sections for long-span bridges from truss-stiffened to quasi-streamlined, and then to multiple-box cross-section geometries, the importance of aeroelastic performance is becoming increasingly significant in wind-resistant design. This article shows that there is clearly insufficient qualitative as well as quantitative understanding of turbulence effects on bridge aerodynamics, particularly the mechanisms behind them. Although turbulence might help the stabilization of long-span bridges, and is thus not a conclusive parameter in wind-resistant design, turbulence effects on the aerodynamic and aeroelastic behaviors of a bridge need to be better understood because interaction between a bridge and turbulence always exists. This article also briefly introduces a newly developed multiple-fan wind tunnel that is designed to control turbulence to assist the study of turbulence effects.

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