朱保兵，  徐晓明，  周宇庆
   （上海建筑设计研究院有限公司，上海 200041）

[摘要] 辽宁省科技馆属于超长、不规则、带大悬挑的超限钢-混凝土混合结构。介绍了工程的特点和结构体系的选择，针对结构超限情况提出了相关的抗震措施。针对主体混凝土结构、主体钢结构、钢结构球体、大挑檐，进行了系统的分析和设计。经过对整体结构进行弹塑性动力时程分析，考察了结构的塑性发展程度和变形能力，并对薄弱构件进行了加强。支撑体系设计时考虑采用屈曲约束支撑构件，以尽量减小外观尺寸并改善抗震性能。设计结果表明，结构抗震性能良好，结构体系安全可行。
[关键词] 结构超限；混合结构；弹塑性动力时程分析；屈曲约束支撑
中图分类号：TU318    文献标识码：A  文章编号：1002-848X(2012) Sl-0356-05

Study on overrun structural design of Liaorung province Science and Technology Museum
Zhu Baobing, Xu Xiaoming, Zhou Yuqing
( Shanghai Institute of Architectural Design&Research Co., Ltd., Shanghai 200041, China)

Abstract: Liaoning province Science and Technology Museum belongs to the long, irregular, overrun with large cantilever steel-concrete mixed structure. The characteristics and choice of structure system was described.  Seismic measures related to the structural overrun situation were recommended.  System analysis and design were done for main concrete structure, steel structure, steel ball, corona. After elastic-plastic dynamic time history analysis of the whole structure, degree of plastic development and deformation ability of the structure were checked and the weak component were strengthened. To
minimize the apparent size and improve the earthquake resistance performance, buckling-restrained brace support system was used.  Design result shows that structural earthquake resistance performance is good, structural system is security and feasible.
Keywords: structural overrun; mixed structure; elastic-plastic dynamic time history analysis; buckling-restrained brace