Research on flutter-mode transition of a triple-tower suspension bridge based on structural nonlinearity

The aerodynamic characteristics of a multispan suspension bridge differ from those of a two-span suspension bridge. In this study we investigated the nonlinear aerodynamic characteristics of the Maanshan Bridge under nonstationary flow using combination quasi-3D finite element (FE) bridge models of 2D nonlinear aerodynamic force models and 3D nonlinear FE bridge models. The developed model predictions were validated by wind tunnel tests involving a 2D sectional stiffness model and 3D full-bridge aeroelastic model. Results showed that the developed model could potentially describe the nonlinear and unsteady aerodynamic effects on the bridge. Furthermore, the flutter behavior of the Maanshan Bridge under uniform flow changed from the stable limit cycle of soft flutter to unstable limit cycle with the disconnection of two hangers at the 1/2L of the right main span, while the flutter behavior of the bridge under turbulence flow could be defined as the fracture failure of the hangers from the 1/2L of the left main span.

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Theory for nonlinear section model tests in the wind tunnel for cable-supported bridges

Maheux

King

Damatty

et al. 2022

Engineering Structures

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Research on flutter-mode transition of a triple-tower suspension bridge based on structural nonlinearity

Cited by 6 publications

References 21 publications

Comparison of Wind Tunnel Results for the Development of a New Section Model Test Rig for Bridges

Comparison of Wind Tunnel Results for the Development of a New Section Model Test Rig for Bridges

Nonlinear Wind-Induced Vibration Behaviors of Multi-tower Suspension Bridges Under Strong Wind Conditions

Theory for nonlinear section model tests in the wind tunnel for cable-supported bridges

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