Aeroelastic Analysis And Sensitivity Of The Fluter
Speed Of Long Span Suspension Bridges With
Distributed Computing
Author(s)
S. Hernández, J. A. Jurado & F. Nieto
Abstract
One of the main difficulties in the design of long span suspension bridges is the
stability under wind loads and examples of failures due to flutter have been
experienced in the past. Current methods of aeroelastic studies, which rely not
only on experimental data but also on computer analysis, open the door for
adding sensitivity analysis techniques with the objective of helping engineers in
the design of such challenging constructions. In this paper, a methodology aimed
at that objective is implemented in a distributed computing environment and an
example, corresponding to the Great Belt suspension bridge with a span of
1624 m, is included showing the capabilities of the approach developed.
1 Introduction
Suspension bridges have been always a challenge for civil engineering designers.
When the length of span of such structures increases the main difficulties for the
design are not those coming from service loads as vehicles or trains, but seismic
or wind actions. In the case of wind loads it is very well known the disastrous
effect produced by a windstorm in the Tacoma Narrows Bridge that collapsed in
1940.
Nevertheless the advances in the knowledge of how wind pressures interact
with cable supported bridges have led to the possibility of building longer and
longer suspension bridges. Today the world record corresponds to the bridge
over the Akashi strait in Japan with a span length of 1991 m and a bridge over
the Messina strait in Italy with 3300 m of span length is currently under project.
In both cases wind behaviour of the bridge is one of the main concern for the
final design and this circumstance will be identical in every long span bridge to
Keywords
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