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TECHNICAL INFORMATION

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[IABSE 2018 France] Cable Stays – Queensferry Crossing 2020-03-20
ÆÄÀϾÆÀÌÄÜ Ã·ºÎÆÄÀÏ :

Abstract

The Queensferry Crossing is a new cable stay bridge with a total length of 2700m with two

continuous spans of 650 m. The bridge is designed by a joint venture composed of Leonhardt, Andrä

und Partner, Ramb©ªll and Sweco UK.

The Queensferry crossing is composed of 144 pairs of stay cables and the last 10 pairs overlap each

other in the middle of the main spans. This particular arrangement brought stiffness to the structure

but also created challenges where stay cables required de-stressing during construction up to

600mm. Concept and resolution of this challenge will be detailed.

The slenderness of its structure and its location in severe environmental conditions has brought

dynamic issues for the stay cables system with important cable service rotation. VSL friction damper

has been selected thanks to its ability to address important cable displacements.

Integration of the VSL Vibratest system in the bridge erection sequence to measure stay cable force

and damper performance and will be presented in the last section.


Keywords: Bridge, Cable stay, Queensferry crossing, Cable dynamics, Friction damper, De-stressing,

 
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