某不对称大跨高位偏心连体结构整体设计

The Overall Structure Design of an Asymmetric Large-span Eccentric Double-tower Connected Super High-rise Building

本工程为不对称高位大跨连体超限高层建筑,南侧塔楼32层,屋面高度为135.9 m,北侧塔楼22层,屋面高度为93.1 m,两栋塔楼轴线夹角为17°,连体位于19~22层,连体跨度约45 m。两侧塔楼高度、结构体系均有明显差异,除连体外,还存在扭转不规则、斜柱、楼板不连续、局部转换等多项不规则。本项目的重点和难点是连体结构方案。根据单体的结构布置及动力特性,比较强连接、弱连接方案的优劣,最终采用强连接的连体方案。针对连体及各项不规则,进行了性能化分析,采取针对性的加强措施;同时针对连体考虑施工状态,采用合理的施工方案,进行了专项分析,实现设计、施工统筹考虑。各项分析结果表明,结构可满足预定的抗震性能目标,实现了建筑设计的意图。

This project is a large-span double-tower connected high-rise structure building,the south tower has 32 floors with a roof height of 135.9 m,the north tower has 22 floors with a roof height of 93.1 m,and the angle between the axis of two towers is 17 degrees,and the conjoined body is located on the 19~22 floors.The height,structural system,and dynamic characteristics of the towers on both sides are obviously different,and besides the conjoined body,there are many other irregularities including torsional irregularity,inclined column,floor discontinuity,and local conversion.The key and difficult point of this project is the joint structure scheme.According to the structural arrangement and dynamic characteristics of the unit,the advantages and disadvantages of the strong connection and weak connection schemes are compared,and finally,the strong connection scheme is adopted.The performance-based analysis is carried out for the conjoined body and various irregularities,and the corresponding strengthening measures are taken.At the same time,considering the construction state of the conjoined body,a reasonable construction scheme is adopted,a special analysis is carried out to realize the overall consideration of design and construction.The analysis results show that the structure can meet the predetermined seismic performance targets,and the intention of architectural design was realized.