赵昕1，2，袁聚云3，4，刘射洪3，4

（1 同济大学建筑工程系， 上海 200092； 2 同济大学建筑设计研究院（集团）有限公司， 上海 200092；

3 同济大学地下建筑与工程系， 上海 200092； 4 同济大学岩土及地下工程教育部重点实验室， 上海 200092）

［摘要］在超高层建筑结构与地基基础共同作用过程中，材料、结构及荷载均是时变的。结合工程实例，从地基沉降的时变性规律及上部结构的时变性规律出发，采用以时间切片的形式考虑时变效应的分析方法，通过PLAXIS和ETABS软件分析超高层建筑地基-基础-上部结构共同作用体系的时变性对桩筏基础筏板弯矩的影响。分析结果表明，对于高500m以上的超高层建筑，这种影响在工程允许范围之内，即传统计算方法的一次加载分析就能满足筏板弯矩的计算精度要求。

［关键词］超高层建筑； 时变性沉降； 施工过程； 共同作用； 筏板弯矩

中图分类号：TU470文献标识码：A文章编号：1002-848X(2016)02-0065-06

Time-dependent raft bending moment analysis for pile-raft foundation of super tall buildings

Zhao Xin1, 2, Yuan Juyun3, 4, Liu Shehong3, 4

（1 Department of Structural Engineering, Tongji University, Shanghai 200092, China;

2 Tongji Architectural Design (Group) Co., Ltd., Shanghai 200092, China; 3 Department of Geotechnical Engineering,

Tongji University, Shanghai 200092, China; 4 Key Laboratory of Geotechnical and Underground Engineering of the

Ministry of

Education, Tongji University, Shanghai 200092, China）

Abstract:In the interaction process between superstructure and foundation for super tall buildings, materials, structures and loads are all time-dependent. Combined with engineering project and based on the time-dependent features of settlement and superstructure, time-slicing analysis approach was used to consider the time-dependent effects. Influence of time-dependent of integrated system of super tall building ground-foundation-superstructure on raft bending moment of pile-raft foundation was carried out by software PLAXIS, ETABS. The analysis results show that the bending moment differences in super tall buildings raft caused by the time-dependent effect are within permissible range of engineering practice for the super tall buildings over 500m. The once-loading analysis in traditional calculation method can meet the calculation accuracy requirements of the raft bending moment.

Keywords:super tall building; time-dependent settlement; construction sequence; interaction; raft bending moment

*上海市优秀技术带头人计划（14XD1423900），上海市科技攻关计划（09dz1207704）。

作者简介：赵昕，博士，高级工程师，硕士研究生导师，Email: 22zx@ tjadri.com。