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Abstract

To investigate the wind-induced vibration of a suspended monorail bridge,a full-bridge aeroelastic model at a 1∶40 scale was designed and fabricated according to the geometrical parameters and dynamic characteristics of the real bridge.Wind tunnel tests on the bridge in both the completed state and the maximum cantilever state were conducted under different conditions,including uniform flow and turbulent flow,yaw angles of ± 45°,±30°,±15°,and 0°,and wind attack angles of ‒ 3°,0°,and + 3°.Both vertical and torsional displacements of the structure under different wind speeds were measured.The test results show that the vertical displacements and torsional responses of the cable-stayed bridge increase when the wind speed increases from 1 m/s to 12 m/s (equivalent to 6.3‒76.0 m/s for the real bridge ).No flutter,galloping,or vortex-induced vibration was observed,and the critical flutter wind speed exceeds 76 m/s.In addition,the yaw angle has little effect on the structural response of the completed bridge but has an obvious effect on that in the maximum cantilever state.In both states,the structural response under a wind attack angle of + 3° is the largest,making it the most unfavorable wind attack condition.The results verify that the suspended monorail cable-stayed bridge offers good wind-resistance performance.

Publication Date

8-15-2025

DOI

10.14048/j.issn.1671-2579.2025.04.021

First Page

166

Last Page

173

Submission Date

August 2025

Reference

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