HUMAN COMFORT EVALUATION OF WIND-INDUCED TALL BUILDING MOTIONS IN CONSIDERATION OF MOTION PERCEPTION DISPERSION

Abstract

The tall, light, flexible buildings may have large oscillating motions induced by wind or other causes that affect the comfort of the occupants. The purpose of present study is to propose the probability-based design criteria associated with human comfort that is applied for serviceability limit state design. The design criteria was proposed based on the subjective perception test. The guideline for evaluating the acceptability of wind-induced tall buildings motions was defined by the expected value and coefficient of variance (COV) of motion perception acceleration. The probability distribution of motion perception was assumed to be lognormal. The guideline is applied to average value of peak acceleration in one-year. The human comfort of existing 25 tall buildings in Japan were evaluated based on serviceability limit state design using the motion perception index b. According to these evaluation, it is found that the proposed criteria is appropriate comparing with existing criteria for limiting discomforting building motions. The motion perception index β corresponds to the AIJ guidelines when β=0 and H-4, β=1 and H-3, β=2 and H-2 are assumed to be equivalent.