With the majority of research in structural engineering focused on design and performance at ultimate limit state, vibration serviceability is frequently overlooked. In fact few wind codes make any provision for it and for those that do, the treatment is partial and opaque. For expensive high-profile structures occupants will not tolerate vibration-induced discomfort, so vibration serviceability becomes a governing criterion. The paper briefly reviews some provisions for predicting and assessing vibration serviceability for building sway, with reference to full-scale studies. One of the key concerns for evaluating vibration serviceability is a reliable estimation of damping, this has always been a difficult parameter to quantify, the difficulty seemingly being in direct proportion to the need for accuracy. Recent years have provided improved technology for damping estimation, and this paper studies estimation of damping and effects on full-scale performance for two tall structures.
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