弦支穹顶结构实物动力特性研究  

STUDIES ON DYNAMIC PROPERTIES OF REAL SUSPENDOME STRUCTURE ON SITE

作　　者：陈志华[1] 张立平[1] 李阳[1] 窦开亮[1] 郭云[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《工程力学》2007年第3期131-137,共7页Engineering Mechanics

基　　金：国家自然科学基金资助项目(50008010)

摘　　要：介绍了弦支穹顶结构在我国的工程应用实例;针对天津博物馆实物弦支穹顶,理论分析了实物弦支穹顶结构在不同施工阶段的频率值;利用环境激励法和锤击激励法对结构不同施工阶段进行实物动力试验,并对试验过程、结果进行了阐述;通过模态分析,得出弦支穹顶结构具有基频较大、振型密集、整体性好的特性;对比分析了弦支穹顶结构两阶段动力特性的差异。The application of suspendome system in China is introduced; For the real suspendome structure on site of Tianjin Museum, frequencies of different construction stages for this structure are calculated; Dynamic tests at two construction stages are carried out by Ambient Excitation Method and Hammer Exciting Method separately, test process and results are analyzed; Through modal analysis, it is concluded that the suspendome structure has such properties as high basic frequency, closely distributed modes and sound integral structural performance; By contrast, the differences in the properties of suspendome structure at two stages are studied.

关 键 词：弦支穹顶 实物 动力特性试验 激励法 模态分析 

分 类 号：TU311[建筑科学—结构工程] TU378