科研之友
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摘要
The structural failure of the long-span roof is easily caused by the fluctuating wind loads, and research on the wind load distribution and fluctuating characteristics is a critical basis for wind-resistant design. Taking the long span skirted roof of Suzhou Taiping Financial Center as the engineering background, this paper uses the large eddy simulation(LES) method to simulate and analyze the distribution of fluctuating wind pressure on the roof surface, the power spectral density of fluctuating wind pressure, and the spatial coherence of the fluctuating wind pressure. The simulation results suggest that the wind pressure energy of the roof concentrates in the low frequency part of the windward state, and the corner area of the connection between the main body of the roof and the main building may increase the fluctuating wind pressure under the action of the conical vortex. The coherence of the fluctuating wind pressure between the measuring points decreases with the increase of the frequency and the distance between the measuring points. At high frequencies, the coherence function is attenuated to below 0.2 and can be considered as irrelevant.
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