体育场悬挑屋盖结构风荷载解析模型

摘要

结合援莫桑比克国家体育场刚性模型风洞试验数据,分析了悬挑屋盖结构表面风压分布特性、脉动风荷载谱特性和脉动风压空间相关性,并利用体育场风洞试验测压数据,拟合了各区域脉动风压谱和相干函数的经验公式,建立了此类结构的风荷载解析模型.经过工程算例表明,本文建立的风荷载解析模型用于悬挑屋盖结构的动力响应计算具有较高的精度,有一定的实用价值.%On the basis of pressure data acquired from wind tunnel test of rigid model of Mozambique National Stadium,the characteristics of surface pressure distribution on cantilevered roof structure and wind force spectra were analyzed,and spatial coherence of fluctuating wind pressure was also discussed.The regional spectra of fluctuating wind pressure and the empirical formula of coherence function were fitted,furthermore,the mathematical model for this kind of structures was established.By comparing the responses evaluated by the mathematical model and the numerical model,the engineering examples show that the mathematical model is accurate and applicable for calculations of dynamic response of the cantilevered roof structure under wind actions.