Journal
ENGINEERING STRUCTURES
Volume 120, Issue -, Pages 82-91Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2016.04.025
Keywords
Long-span bridge; Flutter; Torsional divergence; Aerodynamics; Wind-structure interaction; Aeroelasticity; Wind tunnel experiments; Non-flutter design principle
Categories
Ask authors/readers for more resources
Classical flutter of suspended bridge decks can be avoided if the torsional frequencies are lower than the vertical. Wind tunnel tests of single boxes and twin box section models with torsional natural frequencies above and below the vertical frequency has been conducted. Flutter was avoided in all tests where the torsional frequency was lower than the vertical. But too low torsional stiffness caused large static displacements of the girder at medium-high wind speeds and steady state oscillations driven by a combination of torsional divergence and stalling behavior at the critical wind seed. In order to design aerodynamically stable suspension bridges with low torsional natural frequencies it is suggested to increase the mass moment of inertia and provide adequate torsional stiffness by the main cables spacing. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available