Dynamic Behaviour under Wind Loading
Preface
This report presents results from an investigation of the structural behaviour of a 90 m high
steel chimney equipped with a mechanical damper at the top. Due to a mistake in installing
the chimney the damper was not active in the first period of service life, causing large
oscillations of the structure and fatigue cracks to occur within a few months of service.
Because of this an extensive investigation was started to rectify the action of the damper,
repair the steel structure and to monitor the behaviour of the structure adopting a fail-safe
principle. Data from four years of continuous measurements are presented in the report.
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