Wind-Induced Accidents on the Transition Section of a Cable-Stayed Bridge: Cause and Remedy
Publication: Journal of Bridge Engineering
Volume 29, Issue 3
Abstract
This case study investigates two of the wind-induced vehicle accidents that occurred on a cable-stayed bridge in Korea over the past 20 years. Both of these incidents happened at the approach deck of the bridge, where the elevation from the sea level was only about 57% of the main span height. The investigation was focused on determining whether specific structural components or geometrical characteristics around the accident locations were responsible for these incidents. To achieve this, scaled-down vehicle and bridge deck models were used in a series of wind-tunnel tests. The results show that the wind load on the vehicles increased by 3–4 times near the accident locations. The primary cause of this anomaly was attributed to the rapid change in deck width. Furthermore, a risk assessment, which considered traffic and wind environments, showed that the risk level at the accident location was 100 times higher than at any other location on the bridge due to these unique characteristics. Additionally, further risk assessment revealed that two measures, traffic control and wind barrier installation, could mitigate the risk at the accident location.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Available data:
Data 1. Dimensions and properties of the truck
Data 2. Aerodynamic coefficients of the truck on the flat ground and each deck model
Data 3. Estimated fragility curves of the truck
Acknowledgment
This research was supported by a grant (21SCIP-B119963-06) from the Ministry of Land, Infrastructure, and Transport of the Korean Government.
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© 2023 American Society of Civil Engineers.
History
Received: Jun 15, 2023
Accepted: Oct 24, 2023
Published online: Dec 27, 2023
Published in print: Mar 1, 2024
Discussion open until: May 27, 2024
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