Analysis of Wind-induced Responses of Dry Coal Sheds Under Interference Condition

Abstract:

This paper presents an investigation of the interference effects to determine a systematic method to research the characteristics of dry coal sheds under (no) interference condition,wind-induced response.Based on the wind pressure distributions on a typical dry coal shed from wind tunnel tests on the rigid model,the wind-induced dynamic responses are computed in frequency domain by using mode superposition method (CQC method).The characteristics of mean，fluctuating and peak responses at different wind directions are analyzed.It is found that the maximum responses in the same region of roof have the similar regulations under different interference conditions.Then the characteristics of gust response factor,background/resonant response and power spectrum density are investigated carefully.When the interfering building is located upstream and downstream respectively,mean responses contribute differently to total responses;and background components contribute to dynamic responses differently either.However,as a matter of fact,some specific modes contribute more to dynamic responses under different interference conditions.

Key words:dry coal shed; interference effect; mode superposition method; wind-induced vibration; wind tunnel test