（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］中国华电大厦的西南角、东南角、东北角均为悬臂深梁+钢桁架的转换结构，承托上部10多层的荷载。转换结构的存在使转换层的层间刚度和楼层抗剪承载力加大，设计中采取措施使主体结构层间刚度比和层间受剪承载能力比均满足了规范的相应指标。对弹性阶段悬挑转换结构的不同部分（混凝土深梁、钢桁架）分担内力、悬挑结构的竖向变形进行分析，采用弹塑性时程分析研究悬挑转换结构大震下的性能，对内置钢桁架的混凝土深梁进行有限元分析。最后对西北角的设置斜拉索的悬挑结构在多种工况下的舒适度进行分析。

［关键词］中国华电大厦； 悬挑转换结构； 钢桁架； 挠度； 弹塑性时程分析； 舒适度

中图分类号：TU318文献标识码：A文章编号：1002-848X(2019)24-0036-07

Analysis and design of corner cantilever transfer structures of China Huadian Building

Lu Guochang, Zhao Yan

(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:There are the transfer structures of the cantilever deep beam + steel truss in the southwest corner, southeast corner and northeast corner of China Huadian Building to support the loads of the ten upper layers. The existence of the transfer structure increases the interlayer stiffness of the transfer layer and the shear capacity of the floors, so the measures were taken in the design to make the interlayer stiffness ratio and the interlayer shear bearing capacity ratio satisfy the corresponding indexes of the specification. This internal forces shared by different parts of the cantilever transfer structure (concrete deep beam and steel truss) and the vertical deformation of the cantilever structure were analyzed the in the elastic stage. The performance of the cantilever transfer structure under the rare earthquake was analyzed by using the elastic-plastic time-history analysis, and the finite element analysis of the concrete deep beam with built-in steel truss was conducted. Finally, the comfort level of the cantilever structure with stay cables in the northwest corner under various working conditions was analyzed.

Keywords:China Huadian Building; cantilever transfer structure; steel truss; deflection; elastic-plastic time-history analysis; comfort level

作者简介：鲁国昌，硕士，正高级工程师，Email:149022058@qq.com。