瞬間的な風向変化により外装材に作用する風圧性状

概要

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Wind direction changes all the time in natural winds Many results of field measurements have pointed out that wind pressures on claddings have been influenced by the instantaneous change of wind direction But there are a number of unclanfied points, because it is difficult to reproduce the phenomenon in wind tunnel And so we carried out wind tunnel experiment which could reproduce the change of wind direction by turning of the model This report studies the process of the pressure field due to the change of wind direction and tries to clarify its relation to large negative pressure which deals with an important problem on the wind resistant design As a result of analysis, we confirmed the existence of the large negative pressure on the flat roof when the vortex before a change in wind direction was stretched to leeward by the change of wind direction.
2003-01-30