Wind tunnel test on wind load of a large-span shaped roof structure

Large-span roof structures are sensitive to wind loads, and the values taken by the code usually cannot meet the design requirements. By conducting scaled rigid model wind pressure tests on a large-span irregular roof in Xi'an, the wind pressure coefficients of the cantilevered curved roof under different wind directions were systematically analyzed. The results show that the roof is mainly subjected to negative pressure, with local positive pressure at the eaves and on the upper surface of the north building. Strong suction zones are easily formed at the top of the roof in the south building and on the upper surface of the north building. The structural strength of the roof should be appropriately strengthened on the eaves and on the east side of the north building roof. The curtain walls of the south and north buildings are mainly subjected to negative pressure, with similar effects of wind loads on the various facades of the south building curtain wall and greater effects on the east and north facades of the north building curtain wall. The wind resistance of the west and south facades of the north building curtain wall should be strengthened.