(1 北京交通大学 100044；2 北京中天建中工程设计有限责任公司 100081；3 中国建筑设计研究院 北京 100044)

［提要］  通过对一大底盘双塔带高位转换超限高层结构主要设计过程的介绍，重点讨论了结构选型、分析计算以及抗震措施，并针对高位转换这一主要超限特点，从整体结构布置到关键构件的选取提出了相应的应对措施。经多模型、多软件的比较分析及弹性、弹塑性补充计算表明，该工程各项计算指标比较理想，所采取的措施比较合理，整体设计满足规范要求。

［关键词］  超限高层  不规则结构  双塔建筑  转换层  抗震设计

Structural Design of a High-rise Building Beyond Code Limits/Liu Wenting1, Zhang Tao2, Xie Dingnan3(1School of Civil Engineering & Architecture, Beijing Jiaotong University，Beijing 100044, China；2Beijing Zhongtian Jianzhong Co.， Ltd.,  Beijing 100081, China；3China Architecture Design & Research Croup, Beijing 100044,China)

Abstract:The structural design of a highrise twintower building with large podium is introduced. The selection of structural system, seismic analysis and seismic fortification measures are discussed in detail. For the design of transfer story beyond code limits, the main control measures of antiseismic design, such as the total structural plane arrangement and the selection of key member, are presented. The seismic analysis results of multimodels using different analysis programs and the results of linear and nonlinear time history dynamic analysis are given. It is found that the control value for designing such structure is feasible and the design can meet demand of codes.

Keywords:high-rise building beyond the code limits; irregular structure; twin tower building; transfer story; seismic design