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Lecture

Wind and structures and motion… Is there something we miss on how the three connect? London

Event organised by Wind Engineering Society

Date
16 May 2017
Time
19:00 - 21:00 BST (GMT+1)
Location
Institution of Civil Engineers
One Great George Street
Westminster
London
, SW1P 3AA
United Kingdom

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Overview

Starting from the engineering benchmark failure of fluttering bridges (see the infamous Tacoma Narrow Bridge collapse), this presentation will attempt to give a holistic overview of large wind-induced vibrations and engineering explanations that seem to not fully work in our design practices. Based on full-scale tests, within a laboratory setting or outside in the "real wind", a number of critical observations are highlighted.

Particular focus is given on aerodynamic self-excited forces or else the interaction part of the loading that is not fully understood and at times, and not only in aerodynamics, it is emerging beyond expectation to source the large structural vibrations all engineers want to avoid.

An ideal exemplar are the dry-galloping vibrations of inclined stay cables, a real controversial phenomenon that although concerted international efforts still hides its mechanistic insights. Namely, recent findings indicate that the quasi-steady aerodynamic theory does not fully capture the details of this unstable condition, and neither does the axial flow propagating on the lee side of inclined cables, and nor does the critical Reynolds number range transition.

So what is the way forward? Some answers and even more questions are what this presentation sets to put forward.

For more information please contact:

Elira Alushi