超高层建筑外部悬挑超大梁施工技术分析

Analysis of Construction Technology for External Super Large Cantilever Beam of Super High-Rise Building

有不少超高层建筑为追求标志性,多在外形设计上采用独特造型,令其结构复杂。但在超高作业环境下,常规建筑施工方法往往难以实施。以中山蒂森电梯试验塔项目为例,对其外壁悬挑超大梁结构的施工技术进行分析,利用Midas有限元软件建立模型并进行分析验算,最后按照规范对支撑钢平台与结构连接节点(斜拉钢梁、预埋件焊缝)进行计算验证,从而保证悬挑结构顺利实施,可为今后类似超高层建筑外部大悬挑结构施工提供借鉴。

Many super high-rise buildings adopted unique appearance design for pursuit of landmarks,which led to complex structure.However,under the ultra-high working environment,conventional construction methods are often difficult to implement such purpose.Taking the experimental tower of Zhongshan Thyssen Elevator as an example,this paper analyzes construction technology for external super-large cantilever beam.Midas finite element software has been used to establish the model and to carry out analysis and checking calculation,and finally,according to the specifications,the connection joints(cable-stayed steel beams,welding seams of embedded parts)between the supporting steel platform and the building structure have been verified by calculations so as to ensure the smooth implementation of the cantilever structure,which can provide references for future construction of external large cantilever structures in similar super high-rise buildings.