(1 上海建筑设计研究院有限公司，  上海  200041；  2 上海竹园工程管理有限公司， 上海 200127)

［摘要］以上海国际金融中心项目中复杂大跨圆形剧院设计分析为背景，对屋盖结构预应力体系进行内力分析，提出通过在圆形剧院屋盖结构中部设置环梁解决径向梁在中部交汇问题的方法。通过对环梁和径向梁进行内力分析，得出环梁为近乎均匀的受弯构件，且轴向拉力并不大，进而可知环梁和环梁内部所围成的厚板可以起到有效传递弯矩的作用。在环梁和板共同刚度足够大的情况下，现有结构的受力等同于原所有梁汇交于中点的受力。基于径向梁靠中部刚性块连为整体的受力形式，在施工顺序中应尽量安排对称张拉。最后对比了剧院屋盖结构挠度的实测结果与计算结果，二者结果基本吻合。

［关键词］复杂大跨； 预应力； 剧院； 施工顺序； 现场实测

中图分类号：TU318文献标识码：A文章编号：1002-848X(2017)12-0074-04

Design and internal force analysis of prestressed concrete system for complex large-span circular theatre

Zhang Jian1, Su Zhaoyang1, Ding Ying2

(1 Shanghai  Architectural Design & Research Institute Co., Ltd., Shanghai 200041, China； 

2 Shanghai Zhuyuan Project Management Co., Ltd., Shanghai 200127, China)

Abstract:Based on the design and analysis of the complex large-span circular theater of the Shanghai International Finance Center project, the internal force analysis of the prestressed system of roof structure was conducted. A method was proposed for solving the problem of radial beam confluence in the middle by setting a ring beam in the middle of the circular theater roof structure. By analyzing the internal forces of the ring beam and the radial beam, it is concluded that the ring beam is a nearly uniform bending member and the axial tension is not large. It can be seen that the thick plate surrounded by the ring beam and the ring beam can effectively transmit the bending moments. In the case where the common stiffness of the ring beam and the plate is large enough, the existing structure is equivalent to the force of all the beams at the midpoint. Based on the mechanical form with radial beam composed as a whole by the rigid block in the middle, a symmetrical tension should be arranged in the construction sequence. Finally, the field measurement results of the roof structure deflection of the theater are compared with the calculated results. The results are in good agreement with each other.

Keywords:complex large-span; prestress; theatre; construction sequence; field measurement

*上海市住房和城乡建筑管理委员会科研项目（建管2016-001-003）。

作者简介：张坚，本科，高级工程师，Email：zhangjian@isaarchitecture.com。