（上海建科工程改造技术有限公司， 上海 200032）

［摘要］受建筑功能的调整需要，既有建筑常常存在拔除承重柱的情况。已有的拔柱改造实践多为多层房屋的顶层柱，且柱截面普遍较小，而拔除高层建筑底层巨柱的相关工程实践尚不多见。针对该类项目的特点，将桥梁托换技术运用于房屋结构中，并结合一个工程案例，阐述了运用该方法进行改造设计的全过程。通过精细有限元分析验证了该方法的有效性和可靠性。

［关键词］托梁拔柱； 巨柱； 高层建筑

中图分类号：TU973文献标识码：A文章编号：1002-848X(2019)10-0022-04

Research on design of removing mega column at bottom of a high-rise building

Yang Kai, Jiang Lu, Zheng Hao, Lu Jun, Lan Xueping

(Shanghai Jianke Engineering Reconstruction Technology Co., Ltd., Shanghai 200032, China)

Abstract:Due to the adjustment need of architectural functions, the phenomenon of removing load-bearing columns in existing buildings is very common. The practices of structural renovation with removing column concentrates on the top floor columns of multi-story houses, and cross sections of the columns are generally small. Relevant engineering practice of removing the mega columns at the bottom of the high-rise buildings is still very rare. Underpinning technology in bridge was applied to the housing structures aiming at this kind of project. An engineering case was used to elaborate the whole process of renovation and design using this method, and the validity and reliability of this method were verified by fine finite element analysis.

Keywords:beam supporting and column removing; mega column; high-rise building