On the Wind-Induced Response of Tall Buildings: The Effect of Uncertainties in Dynamic Properties and Human Comfort Thresholds

Abstract eng:
Modern buildings with low inherent damping become dynamically sensitive to wind actions, which potentially increase their acceleration levels under even moderate wind speeds. As a result, issues of occupant comfort have become increasingly concerning for tall building designers and researchers, prompting a number of studies to determine acceptable levels of acceleration. Due to a number of factors, including the variability of individual responses to building motion, the definition of an acceptable habitability limit state is still largely debated, as discussed in this study. Considering the importance of damping in meeting these perception criteria, this study also explores the issues of amplitude-dependence and uncertainty in damping, with comparisons to recently collected full-scale data. In light of the uncertainties in both the occupant comfort criteria and damping value, and in the design wind speeds and other related parameters, a probabilistic framework is then introduced to evaluate a building’s habitability performance at a variety of wind speeds.

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