基于虚拟激励法的大型幕墙结构的风致响应谱分析

Response Analysis of the Larger Curtain Wall cased by Wind base on the Pseudo-excitation Method

自然风中的脉动风分量是引起结构风激振动(抖振)的主要因素,持续的抖振可引起结构产生较大的变形及应力,同时引起结构的疲劳损伤。该文基于有限元法及虚拟激励法,分析了玻璃幕墙结构支承体系在风载荷作用下的响应,得出结构在风载荷作用下的功率谱,进而可得到节点位移,加速度及内力均方差等,为合理设计结构提供理论依据。

The main reason of wind vibration is pulse part of nature wind,the persistent buffeting may bring biggish distortion and stress in the structure,at the same time it will bring the fatigue of the structure.In this paper,we use the finite element method and pseudo-excitation method to analysis the response of the supporting system of glass curtain wall,and get the node displacement and the acceleration of the structure yet.The data can be used the design of the structure in reason.