陈志华  郭  云  李  阳　（天津大学建筑工程学院　300072）

[提要]  以跨度35.4m，矢高4.6m的天津保税区商务中心弦支穹顶屋盖为例，进行了预应力的设定分析。采
用ANSYS程序进行了结构的模态分析和地震响应分析，得到了弦支穹顶结构体系的动力性能结果，并将弦支穹顶的动力性能与相应的单层网壳做了分析比较。对两种激励作用下的弦支穹顶实物进行了频率动力性能的实验研究，验证了理论分析结果的合理性。
[关键词]  弦支穹顶  预应力设定  频率  模态分析  地震响应分析

Taking a suspendome with span of 35.4m and rise of 4.6m as the example,the modal analysis and seismic analysis of the structure are carried out using the ANSYS software.The dynamic features of the suspendome are obtained and compared with those of a single-layer dome with the same span and rise. Experimental study of a real project is also carried out under two kinds of excitations to find out the frequency features of suspendome structures.
Keywords: suspendome; prestress; frequency; modal analysis; seismic analysis

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