(1 中国航空规划建设发展有限公司，北京 100120； 2 北京科技大学，北京 100083)
［摘要］以北京金融街F7/9 工程中厅空间张弦梁结构为分析实例，重点分析结构矢跨比、预应力度对结构静力性能、整体稳定性能的影响，分析表明矢跨比对结构稳定性能和结构位移影响较大，而预应力度影响较小，且随着矢跨比增大，整体稳定对预应力敏感度降低。四种不同计算模型对比分析表明，屋面檩条的存在与否及其连接刚度对整体稳定具有显著影响，檩条和交叉索的设置大大提高了结构整体稳定性。最后通过罕遇地震作用下弹塑性时程分析，得出了结构体系在大震下的响应特性。
［关键词］空间张弦梁；结构矢跨比；预应力度；几何非线性；材料非线性；稳定承载力
Design and research on structural system of spatial beam string structure
Wang Shu1, Guan Zhizhong1, Ge Jiaqi1, Liang Yishan2, Liang Haitong1(1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120,China； 2 University of Sience and Technology Beijing,Beijing 100083,China)
Abstract:For the spatial beam string structure of Beijing Finance Center F7/9, the impact of the ratio of rise to span and the pre-stressing ratio on the structural static behavior and the structural overall stability is analyzed. The results show that the ratio of rise to span has an apparent impact of the structural overall stability and the structural displacement, while the prestressing ratio plays few impact. As the ratio of rise to span increases, the sensibility of the prestressing ratio on the overall stability drops. The existence of the purlin and its connection rigidity take an explicit effect on the overall stability, and the arrangement of the purlin and the diagonal cable largely raises the overall stability, by analyzing and comparing four different calculation models. The structural seismic response performance under rare earthquake is obtained by the elastic-plastic time-history analysis.
Keywords:spatial beam string structure; ratio of rise to span; prestressing ratio; geometric nonlinearity; material nonlinearity; overall stability
作者简介：王树(1972-)，男，高级工程师，一级注册结构工程师，Email:nwj1973@163.com。
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