Wind tunnel test for wind pressure distribution characteristics on Dalian Shell Museum

To satisfy the requirements of wind resistance for the Dalian shell museum,wind tunnel test for wind pressure distribution were performed.Firstly,the technical parameters used in the test and the basic data processing methods are introduced in detail.Then contour curves of mean wind pressures for the most unfavorable conditions are given,which show clearly the characteristics of wind pressure distributions on the roof of the building,and the variations of wind pressure for typical measurement points under different wind azimuth are given.At last,the peak local shape coefficients under each wind direction with their positions are analyzed,and the local shape coefficients of roofs are compared with Load code for the design of building structures(GB 50009—2001).The results indicate that the wind load on the upper surface of the roof mainly presents negative pressure,which is bigger on the border of the overhang eaves in the wind exposure areas while is smaller or presents positive pressure in the wake area of the roof.The distribution of wind load on the cantilevers at the two sides of the roof and the main entrance when in the windward area mainly shows positive pressure.It's the biggest near the corner where is sensitive to the wind.Therefore,the plus or minus signs of the shape coefficients should be considered in design.The results indicated in this paper can be used as reference for the wind resistance design of the building.