An Analysis Method for Wind-Wave Coupling Induced Random Vibration of Sea-Crossing Super-Large Bridges

LIU Gao; CHEN Shang-you; LIU Tian-cheng; WANG Kun-peng

doi:10.21656/1000-0887.370553

Volume 38 Issue 1

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Article Navigation > Applied Mathematics and Mechanics > 2017 > 38(1): 75-89

LIU Gao, CHEN Shang-you, LIU Tian-cheng, WANG Kun-peng. An Analysis Method for Wind-Wave Coupling Induced Random Vibration of Sea-Crossing Super-Large Bridges[J]. Applied Mathematics and Mechanics, 2017, 38(1): 75-89. doi: 10.21656/1000-0887.370553

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An Analysis Method for Wind-Wave Coupling Induced Random Vibration of Sea-Crossing Super-Large Bridges

doi: 10.21656/1000-0887.370553

CCCC Highway Consultants Co., Ltd.; CCCC Highway Bridge National Engineering Research Centre Co., Ltd., Beijing 100088, P.R.China

Funds: The National Hightech R&D Program of China (863 Program)（2007AA11Z101）

Received Date: 2016-12-17
Rev Recd Date: 2016-12-23
Publish Date: 2017-01-15

Abstract

Abstract

The motion equation for wind-wave-bridge coupling systems was established, based on the combination of the finite element method and the boundary element method, to consider the characteristic parameters’ correlation of the wind-wave coupling fields. In turn, the wave induced force acting on the large-scale deepwater foundation was calculated according to the potential flow theory and the boundary element method firstly, then transferred to the finite element model of the foundation based on the finite/boundary element mapping relation; the aerodynamic forces acting on the bridge were calculated with the finite element method, including the fluctuating wind induced unsteady buffeting force and the aeroelasticity interaction induced self-excited force. By means of the pseudo-excitation method, the random vibration analysis framework for the wind-wave-bridge coupling system was developed. A sea-crossing super-large bridge scheme was taken for example. The research shows, the wind-wave coupling induced bridge foundation internal forces are significantly larger than those induced by wind alone, of which the shear forces are mainly caused by wave, and the lateral moments caused by wave are equal to those caused by wind near the seabed but are larger below. So, the wind-wave coupling effects should be considered in the design of sea-crossing bridges.
- super-large bridge,
- wind-wave coupling,
- potential flow theory,
- finite element method,
- boundary element method,
- pseudo-excitation method

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References(19)

References

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