Abstract
In 1999, 2m amplitude cable vibrations were observed on the Øresund Bridge. The vibrations
were attributed to a change in cable shape due to sleet accretion. Subsequent monitoring of
the bridge, though, revealed other vibration events due to rain-wind induced mechanisms and
parametric excitation (Svensson et al., 2004) – albeit of smaller amplitudes. After two
significant cable vibration events, inspections of the cable anchorages revealed failures in the
damping systems that had been installed to prevent oscillations. Improvements in the
damping systems were introduced and additional tuned mass dampers were installed on the
longest and second longest cable pairs.
Although the bridge has not suffered from any significant vibration events since the
installation of the new damping systems, smaller amplitude vibrations are recorded from time
to time. Peak to peak amplitudes of up to three cable diameters have been observed, although
the most frequent observations are of smaller amplitude and are almost always in
combination with rain.
In this paper, several observations are made, regarding the rain-wind induced vibrations
(RWIVs) of the cables, based on a relatively brief full-scale monitoring campaign from
January 2010 – December 2010. The monitoring shows that there is a direct correlation
between wind-cable angles, wind velocities and the amount of rainfall.
Original language | English |
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Title of host publication | International Conference on Wind Engineering |
Volume | CD-ROM |
Publication date | 2011 |
Publication status | Published - 2011 |
Event | 13th International Conference on Wind Engineering - Amsterdam, Netherlands Duration: 10 Jul 2011 → 15 Jul 2011 Conference number: 13 http://www.icwe13.org/ |
Conference
Conference | 13th International Conference on Wind Engineering |
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Number | 13 |
Country/Territory | Netherlands |
City | Amsterdam |
Period | 10/07/2011 → 15/07/2011 |
Internet address |