（华东建筑设计研究总院，上海 200002）

［摘要］成都大魔方演艺中心大陀螺主体结构为陀螺造型，结构设计采用钢筋混凝土框架剪力墙结构体系，用悬挑桁架实现结构平面的逐层外挑。通过对结构的受力特点以及不规则情况的分析，提出了针对性的加强措施，并对拉弯构件采用有粘结预应力混凝土构件。针对这种特殊的结构体系，分析了楼板刚度和施工后浇带对结构主要构件受力的影响，结果表明，对不同的构件受力影响有所不同，设计时取各种情况下的包络结果作为关键构件的设计依据。罕遇地震作用下的弹塑性分析表明，主体结构能达到预定的抗震性能目标。

［关键词］悬挑桁架; 预应力混凝土; 楼板刚度; 施工后浇带; 弹塑性分析

中图分类号：TU393.3      文献标识码：A      文章编号：1002-848X(2014)07-0037-06

Main structural design and analysis on the main venue of Chengdu Large Magic Cube Performing Arts Center

Jiang Benwei

 (East China Architectural Design & Research Institute, Shanghai 200002, China)

Abstract: The main structure of the main venue of Chengdu Large Magic Cube Performing Arts Center likes a gyro. The structural design adopts the reinforced concrete frame-shear wall structural system,  the cantilever truss is used to achieve the layer-by-layer cantilever. The loading features and the irregularity of the structure were analyzed and some strengthening measures were taken, and the prestressed technology was adopted for the tension-flexure member. For this particular structural system, the mechanical behavior of the key components under without floor stiffness and with post-poured strip was studied. The results indicate that the influence is different in any components, so that the envelope results of all models were considered during the design course. The elastic-plastic analysis under the rare earthquake indicates that the main structure can meet the requirements of the seismic performance objectives.

Keywords: cantilever truss; prestressed concrete; floor stiffness; post-poured strip; elastic-plastic analysis

*国家科技支撑计划资助（2011BAJ09B01）。

作者简介：蒋本卫，硕士，工程师，一级注册结构工程师，Email: benwei_jiang@ecadi.com。

参考文献

［1］张耀康，王帅，周健. 成都大魔方演艺中心小陀螺结构选型与设计［J］. 建筑结构，2012，42（5）：140-144.

［2］周慧，周健，张耀康，等. 成都大魔方演艺中心大陀螺钢屋盖结构设与分析计［J］. 建筑结构, 2014，44（7）：43-49.

［3］成都大魔方项目工程场地地震安全性评价报告［R］. 北京: 中国地震灾害防御中心, 2011.

［4］GB 50011—2010 建筑抗震设计规范［S］. 北京: 中国建筑工业出版社, 2010.

［5］成都大魔方项目测压风洞试验报告［R］. 北京: 建研科技股份有限公司, 2011.

［6］JGJ 3—2010高层建筑混凝土结构技术规程［S］. 北京: 中国建筑工业出版社, 2011.

［7］FEMA 273 NEHRP guidelines for the seismic rehabilitation of buildings［S］. Washington D. C.: Federal Emergency Management Agency, 1996.