Abstract
Horizontal responses of tall buildings to wind are generally a narrow-band random process caused by the light damping of structures. The fundamental natural frequencies of structures are dominant in the time histories of responses. The traces of response are elliptical in shape. It is necessary to evaluate human perception of motion under conditions as similar as possible to those that exist in tall buildings. Although investigations have been conducted on the human perception of horizontal vibration in existing tall buildings, the relationship between the perceotion of random and sinusoidal motion has not been established. The authors first studied the human perception thresholds of uniaxial, elliptical and circular sinusoidal motions to discuss the effect of the two-dimensional motion. Secondly, we studied the perception thresholds of a narrow-band random process to investigate the effect of random motion. In this paper, the human perception thresholds of a narrow-band random process at predominant frequencies of 0.125Hz to 0.315Hz are examined and compared with those of sinusoidal motion. Statistical analyses were performed using the experiment data to propose probabilistic criteria for the perception thresholds.
