期刊
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
卷 42, 期 -, 页码 342-357出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cnsns.2016.05.028
关键词
Suspension bridges; Torsional instability; Hill equation; Modal analysis
类别
资金
- PRIN project Equazioni alle derivate parziali di tipo ellittico e parabolico: aspetti geometrici, disuguaglianze collegate, e applicazioni
All attempts of aeroelastic explanations for the torsional instability of suspension bridges have been somehow criticised and none of them is unanimously accepted by the scientific community. We suggest a new nonlinear model for a suspension bridge and we perform numerical experiments with the parameters corresponding to the collapsed Tacoma Narrows Bridge. We show that the thresholds of instability are in line with those observed the day of the collapse. Our analysis enables us to give a new explanation for the torsional instability, only based on the nonlinear behavior of the structure. (C) 2016 Elsevier B.V. All rights reserved.
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