柱面网壳结构风致抖振响应研究  

ANALYSIS OF WIND-INDUCED BUFFETING RESPONSES OF RETICULATED CYLINDRICAL SHELLS

作　　者：米福生[1] 周晅毅[1] 顾明[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《振动与冲击》2007年第7期32-35,39,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金创新研究群体科学基金(50321803);国家自然科学基金(50608060)

摘　　要：基于刚性模型风洞试验,在时域上对一柱面网壳结构进行风振响应计算,并细致分析了网壳结构在风荷载作用下的节点位移、单元应力、阵风响应因子和响应谱。结果表明,对于柱面网壳结构,受斜风作用时的工况为最不利工况,并且迎风侧端部的位移及单元应力最大;多个高阶振型参与振动;共振响应一般不可忽略,但对于起控制作用的响应,背景分量的贡献大于共振分量。Based on wind tunnel test of a rigid model,wind-induced responses of a reticulated cylindrical shell structure are computed in time domain,and then the nodal displacement,element stress,gust response factor and response spectrum are analyzed.The results show that the displacements of some typical modes and the stresses of some typical elements are largest when the reticulated cylindrical shell is subject to skew wind.This means that the skew wind condition is the most unfavorable condition.Meanwhile,it can be found that several higher order modes take part in vibration,the resonance responses can't be ignored,but the contribution of background components to the response that controls the design is greater than that of the resonance components.

关 键 词：柱面网壳 时程分析 阵风响应因子 响应谱 

分 类 号：TU333[建筑科学—结构工程]