双层球面网壳的风振特性与等效静风荷载

对于网壳结构的抗风性能研究以往大多针对单层网壳,而实际工程中应用较多的则是双层网壳,因此,有必要研究双层网壳的风振性能和抗风设计方法.以实际工程为例,对双层球壳结构的风致动力响应特性进行系统研究,结果表明,对于刚度较大的双层球壳,脉动风响应以背景分量为主,结构对风荷载的动力放大作用可以忽略不计.在此基础上以脉动风荷载均方差作为基向量,提出一种不同于现行规范的等效静风荷载表达方法.

Wind-induced response and equivalent static wind loads of double-layer reticulated shell structures

To systematically research the wind-resistance of double-layer reticulated shell structures widely used in various large public buildings,the wind-induced response of a typical double-layer reticulated shell was analyzed in this paper.The results show that for this kind of rigid structure,the background response contributes much more significantly than resonant response.Based on this condition,an equivalent static wind loads representation method which differs from the current code was put forward.Then the efficiency of this method was demonstrated on the basis of a numerical example.