某大悬挑屋盖结构的风振分析

英文篇名：WIND VIBRATION ANALYSIS FOR A LARGE CANTILEVERED ROOF STRUCTURE
中文刊名：建筑技术开发
英文刊名：Building Technique Development
作者：苏毅 ; 常业军 ; 程文瀼
英文作者：Su Yi Chang Ye-jun Cheng Wen-rang
中文关键词：大悬挑屋盖结构 ; 风振分析 ; 模态分析
英文关键词：Large cantilevered roof structure ; Wind vibration analysis ; Model analysis
出版日期：2008-05-20
机构：南京林业大学土木工程学院;盐城市土木建筑学会;东南大学土木工程学院;
年：2008
期：05
出版单位：建筑技术开发

摘要

某大悬挑钢屋盖结构,悬挑28.23 m。该屋盖结构悬挑跨度大,形状复杂,且悬挑部分上、下表面均受到风的作用,风荷载为支配荷载。介绍了该屋盖结构的结构布置特点以及计算分析要点,并进行了风振分析。根据分析结果,在满足承载力设计的条件下,原设计方案的悬挑自由端竖向位移超出了规范的规定,应对其进行减振设计。
The span of a large cantilevered roof structure is 28.23 m,which has a large span and particular shape.The cantilevered structures of long span roofs are suffered from wind forces on both upper and lower surfaces resulting in a superimposing effect,which domain load is wind load.The characteristics and some analytical keypoints of roof structure were put forward first,and then wind vibration analysis was induced.The result show that the vertical displacements of large cantilevered roof exceeds the code prescript.It is essential to mitigate the vibration response.

引文

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