Abstract
Two data acquisition systems used to collect data for the evaluation of the wind-induced response of Sydney Tower are described and the results from both systems are presented and compared. The response of the Tower was found to decrease markedly with the installation of a secondary tuned mass damper (TMD). Clearly perceptible acceleration is expected to occur at the top of the Tower, on average, a few times each year. The dominant excitation was found to be in the cross-wind direction and probably due to vortex shedding. There is some evidence that the Tower responds differently to wind blowing from different directions, although more data is required before this can be confirmed.
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