Abstract：In recent years, the typhoon disasters have been witnessed in China frequently, and a lot of low-rise buildings in villages have been destroyed in these disasters, which becomes the main reason of causing losses of life and property. For the low-rise buildings, the roof is the most vulnerable part in strong wind. The conventional wind-resistant measure is to increase strength and integrality of roof, which, however, is uneconomic and less effective. In the present study, a new aerodynamic measure of mounting spoilers on the gable roof is taken to mitigate the negative wind pressure. A lot of wind tunnel tests were conducted on a low-rise gable-roof building with spoilers to investigate the mitigation of wind pressure on the roof. The test results show that spoilers play an effective role of mitigating the wind pressure on gable-roof building, and especially for the local peak wind pressure, the maximum reduction percentage is about 49%. The spoilers mounted at the gable wall affect the wind pressure the most, next is the spoilers at the eave; the spoilers at the ridge have no remarkable influences on the wind pressure. Compared to the width and height of the spoilers, the angle of the spoilers shall be the most important factor influencing the reduction of wind pressure. The recommended angle for the spoilers at the eave shall be 0?~30?, and the recommended angle for the spoilers at the gable wall shall be 10?~30?. Based on the comprehensive considerations of economic and structural measures, the recommended height for the spoiler is 1/70~1/12 of the eave height, and the recommended width is 1/20 of the length of the whole building. According to the test results, some practical design suggestions and the reduction coefficients of wind pressure due to the mount of the spoilers are provided.
甘石 李钢 李宏男. 扰流板减小低矮房屋屋面风压试验研究[J]. 土木工程学报, 2018, 51(6): 91-102.
Gan Shi Li Gang Li Hongnan. Study on wind pressure on the roof of low-rise building alleviated by spoiler. 土木工程学报, 2018, 51(6): 91-102.
