RESEARCH ON WIND LOAD CHARACTERISTICS OF COMPLEX DECORATIVE STRIPS ON THE OUTER SURFACE OF HIGH-RISE BUILDING

The decorative strips on the outer surface of high-rise building are becoming increasingly large and flexible, so their wind safety becomes important. However, because of small volume and large numbers of decorative strips, the wind load on the decorative strips is too difficult to estimate by wind tunnel testing. Therefore, the numerical wind tunnel technology is performed to analysis this problem. A high-rising building in Shanghai foreshore is analyzed, with 72 decorative strips being arranged outside the building facades, which are uniformly arranged below 220 m height and curve staggered above 220 m height. By establishing the spatial geometry model with surrounding buildings and decorative strips, the flow field is analyzed under different wind angles and the wind load on the strips is obtained. Through statistical analysis of decorative strips' normal and tangential wind load factor distribution under different wind angles and different height, the results show that the wind load is much larger at the architectural corner area than the middle area, and the reason is investigated. Wind load of the decorative strips can be divided into the corner of the building, the smooth region and the transition region, while their control values are given separately, which can also provide reference for similar projects. Finally, by choosing some typical location overall architectural surfaces, the pressure results of the locations through the wind tunnel test are compared with numerical simulation results, which verify the reliability of the numerical simulation.