辛力，王敏，曾凡生，应向阳

（中国建筑西北设计研究院有限公司， 西安 710018）

 

［摘要］《建筑抗震设计规范》（GB 50011—2010）中介绍了实现结构抗震性能设计目标的参考方法，但目前受制于设计手段，实施起来面临较大困难。中银大厦采用的是框剪+钢桁架连体结构，设计中主体结构选用性能目标D，连体部分的连接支座选用性能目标C，连体结构选用性能目标B。通过理论推导，对规范所给的参考方法进行简化，推导出结构各性能目标相对于常规设计时的地震影响系数，通过修改地震影响系数值，实现不同性能目标结构的抗震设计。另外，高性能目标(C，B)时，针对个别次要构件少量超筋而程序难以调节，适当降低了构件的承载力需求，通过降低承载力而提高变形能力的方法保证其耗能能力相同，实现结构的整体性能设计。弹塑性时程分析结果表明，建议的方法简单有效、可靠度高，可为复杂高层建筑结构基于性能的抗震设计方法提供参考。

［关键词］连体结构; 基于性能的抗震设计; 性能目标; 变形能力; 弹塑性时程分析

中图分类号：TU973.3+1      文献标识码：A      文章编号：1002-848X(2013)09-0047-05

 

Research on performance-based seismic design method of Bank of China Building in Shaanxi

Xin Li, Wang Min, Zeng Fansheng, Ying Xiangyang

（China Northwest Building Design & Research Institute Co., Ltd., Xi′an 710018, China)

 

Abstract: The performance-based seismic design method is introduced in the Code for seismic design of building(GB 50011-2010), but it is difficult to implement under current calculation means. Towers linked with connective structures is used in the Bank of China Building, the performance objective of the main body is D, the bearing of the connective structures is C, and the connective structure is B. Based on the theoretical derivation, the amplification factor of base shear in each performance objective was deduced, and the method proposed by current code was simplified. In performance objective C and B, higher deformation capacity and lower bear capacity are designed for some element which is over reinforced, in order to ensure its energy dissipation capacity. Elastic-plastic time history analysis was used to evaluation the structural performance. The result proves the proposed method is effective. It provides a valuable thought to performance-based seismic design for the high-rise buildings.

Keywords: towers linked with connective structure; performance-based seismic design; performance objective; deformation capacity; elastic-plastic time history analysis

作者简介：辛力，博士，高级工程师，一级注册结构工程师，Email:xinli1129@sina.com。

 

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