大跨悬挑结构风效应试验研究

Abstract

基于黔南体育场刚性模型测压数据，详细分析了风荷载特征与风致响应特性。结果表明：1) 周边的体育馆与山体对体育场风压具有较为明显的干扰作用，最大负风压发生在斜向来流；2) 风致位移响应较小，远小于规范限值；3) 最大负风压发生在迎风的悬挑前沿，且具有很大的逆压梯度。所得结果可为此类大跨悬挑结构进行风荷载设计提供参考。 The characteristics of wind pressures and wind-induced responses were investigated based on the pressure data with rigid model tests of Qiannan Stadium in detail. The results show that: 1) the mountains and the gymnasium have obvious interference effect on the stadium, and the maximum negative wind loads occur in oblique wind direction; 2) the wind-induced displacement responses are small, and far less than the limit specified in the code; 3) the largest negative wind pressures occur in the windward leading edge, and inverse pressure gradient is observed. The results are expected to be very useful for the design of future large-span cantilevered structures.