Abstract
Wind-induced building behavior has been predicted by wind tunnel tests. However, there are still some differences when compared with field measurement data. Research has been carried out to determine the factors causing these differences. One is variation in non-stationary wind-direction, However, the short-term influence of this factor has not been considered when predicting building behavior, by wind-tunnel tests and conducting wind-resistant design of buildings. This is based on wind-resistant design evaluated for the wind direction that induces the largest wind force or wind-induced responses, and its influence was not large. However, when developing a wind-resistant design that considers the behavior of a building for each wind-direction using meteorological wind data for each wind direction, the influence of non-stationary wind directions cannot always be ignored. This is because the method must predict the behavior of a building for a mean-wind direction that induces a minimiun wind force, etc, even though the actual behavior includes that different wind-direction conditions with wind-direction variations. This report considers the behavior of wind-direction itself with an example of field data. It clarifies the influence of non-stationary wind direction on wind-induced response and wind pressures.
