Work

Experimental investigation on the vortex-induced vibration characteristics of long-span twin continuous steel box girder bridge

Year: 2026

Type: article

Abstract: The vortex-induced vibration (VIV) characteristics of a long-span twin continuous steel box girder bridge under varying wind angles of attack ( α m ), Scruton numbers ( Sc ), heights of beam ( D = 0.078 m, 0.108 m, and 0.137 m) and layout forms (twin, single, and twin-girder fixed) are comprehensively investigated by sectional model wind tunnel tests with a scale ratio of 1:40. Results indicate that the VIV response of twin-box bridge is highly complex and shows no clear trend with changes in D or α m . Specifically, the D = 0.078 m model achieves the strongest VIV at αₘ = 5° with the downstream girder having significantly higher maximum dimensionless amplitude ( Aₘₐₓ/D ) than the upstream one; the D = 0.108 m and D = 0.137 m models reach maximum vibration at αₘ = -5°, where the downstream girder has higher amplitude except for a slight upstream advantage in the D =0.108 m model. The phase difference between upstream and downstream bridge is minimal at the onset of the lock-in region, increases toward approximately 180° as wind speed rises, then gradually decreases. Increasing Sc leads to reduced A max /D . Under different layout forms, the largest A max /D occur in the twin, single and twin-girder fixed models at α m = +3°, 0° and –3°, respectively

Source: Advances in Bridge Engineering

DOI: 10.1186/s43251-026-00207-6

Authors: Bo Wang, Fuyou Xu, Mingjie Zhang, Miaomin Wang

Institutions: Xi'an Shiyou University, Dalian University of Technology, University of Exeter

Language: English

Topic: Fluid Dynamics and Vibration Analysis

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: diamond

Funder: National Natural Science Foundation of China