某高层建筑屋顶钢结构塔冠设计与思考
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（华东建筑设计研究总院， 上海 200002）
［摘要］介绍了某高层建筑屋顶钢结构塔冠的结构体系、设计方法、设计结果，着重阐述了一阶弹性分析方法和二阶弹性分析方法计算结果，并对其进行了对比和探讨，提出了二阶弹性分析的必要性。将考虑与不考虑整体初始缺陷两种情况下结构的弹塑性承载力进行对比，结果表明，整体初始缺陷会加快一些构件的塑性变形速率，从而在一定程度上影响结构的整体弹塑性承载力。［关键词］一阶弹性分析方法; 二阶弹性分析方法; 整体初始缺陷; 塑性变形速率; 弹塑性承载力中图分类号：TU473.1 文献标识码：A 文章编号：1002-848X(2016)07-0040-04
Design and reflection on steel tower crown of a highrise buildingYao Gensheng(East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China)Abstract: The structural system, design methods and design results of steel tower crown of a high-rise building were introduced. The results of first order elastic analysis method and second order elastic analysis method were emphasized, compared and discussed. The necessity of adoption of second order elastic analysis was proposed. The elasto-plastic capacity of the structure considering the global initial imperfection was compared with that of the structure not considering the global initial imperfection. Results show that global initial imperfection speeds up plastic deformation rate of some members, which impact global structural elasto-plastic capacity to certain extent.Keywords: first order elastic analysis method; second order elastic analysis method; global initial imperfection; plastic deformation rate; elasto-plastic capacity
作者简介：姚根圣，硕士，工程师，Email: ygs997@163.com。
