（中国建筑设计院有限公司， 北京 100044）

 ［摘要］内蒙古大东方广场上部结构偏置，荷载不均匀，基础差异沉降量大，上部结构具有扭转不规则、楼板不连续及塔楼偏置等多项不规则，属于超限高层建筑。结合其设计过程，讨论了基础设计概况，针对上部结构超限情况，采用基于性能目标的抗震设计方法，讨论了结构不同部位的抗震等级。通过大量的计算分析以及严格的抗震措施，确保了结构在地震作用下具有良好的抗震性能。

［关键词］CFG桩复合地基； 超限高层建筑； 结构不规则； 弹塑性分析； 构造措施

中图分类号： TU318 文献标识码： A文章编号：  1002-848X(2016)S2-0036-06

Structural design of Inner Mongolia Oriental Plaza beyond code limits

Zhang Genyu， Zhu Bingyin， Liu Chuanning， Zhang Yanhua, Luo Xiao, Zhang Kai

(China Architectural Design Institute Co., Ltd., Beijing 100044, China)

Abstract: Leaning upper structure, uneven distribution of load, large differential settlement of the foundation, torsion irregularity, discontinuity of floor slab, upper structure bias are main characteristics of Inner Mongolia Oriental Plaza, it is a special irregular high-rise building. Based on the structure design process, the general design of foundation was discussed，for the conditions of beyond code limits, the performance-based seismic design method was adopted, the concept of different parts of the structure with different seismic grade was proposed。Seismic performance is ensured through lots of calculation analysis and strict aseismatic measures.

Keywords: CFG (cement-flyash-gravel pile) composite foundation; super high-rise building; structural irregularity items; elastic-plastic analysis; construction measure

作者简介： 张根俞，博士，高级工程师，一级注册结构工程师，Email：genyuzhang@163.com。