某树状高层建筑结构设计和分析的若干关键技术问题  

Several critical technical issues of structural design and analysis for a tree⁃shaped high⁃rise building

作　　者：陆文忠 黄昌靛 吴宏磊 王作杰 胡博玺 林晨 LU Wenzhong;HUANG Changdian;WU Honglei;WANG Zuojie;HU Boxi;LIN Chen(WSP Engineering Technology(Beijing)Co.,Ltd.-Shanghai Branch,Shanghai 200052,China;Tongji Architectural Design(Group)Corp.,Ltd.,Shanghai 200092,China;College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100044,China)

机构地区：[1]科进柏诚工程技术(北京)有限公司上海分公司,上海200052 [2]同济大学建筑设计研究院(集团)有限公司,上海200092 [3]北京工业大学建筑工程学院,北京100044

出　　处：《建筑结构》2024年第11期37-45,共9页Building Structure

摘　　要：主要针对某树状高层建筑在结构设计和分析过程中遇到的建筑大悬挑方案的结构实现、竖向力传力路径分析、抗连续倒塌分析、关键构件性能化设计、楼面体系抗拉承载力分析、节点详细有限元分析等关键技术问题进行了分析和研究,与此同时,也对结构的抗风设计、南北侧双核心筒的设置、局部墙体的偏拉、重力二阶效应等技术问题进行了展开并提供了解决方案。结果表明虽该高层建筑存在体型复杂、大悬挑、平面形状不规则、核心筒偏置等难点,但是通过合理的平面和竖向布置,辅之以详尽的结构分析能够保证结构的安全性。尤其是在通过局部斜撑转换较好地实现建筑大悬挑效果的同时,也能够很好地实现竖向荷载的可靠、直接和简洁的传递,分别从依次拆除斜撑和一次性拆除斜撑两个工况进行了抗连续倒塌分析,从完全不考虑楼板作用和考虑后浇相关层楼板的施工模拟两个角度来复核楼面体系的抗拉承载力,对梁-撑转换节点进行了精细化有限元分析等,最终通过进一步验算保证其在不同水准地震作用下仍能很好地满足预定的性能化设计目标。The critical technical issues encountered in the structural design and analysis of a tree⁃shaped high rise building were mainly analyzed and studied,such as the structural realization of the large cantilever scheme of the building,the analysis of vertical force load path,the analysis of anti⁃progressive collapse,the performance⁃based design of key components,the analysis of the tensile capacity of floor system,and the detailed finite element analysis of connections,etc.At the same time,the wind⁃resistant design of the structure,the setting of dual cores at the north and south sides,the partial tension of local shear walls,the second⁃order effect of gravity and other technical problems were carried out and solutions were provided.The results show that although the high⁃rise building has the difficulties such as complex shape,large cantilever,irregular plan and offset cores,etc.,the safety of the structure can be well guaranteed by reasonable plan and vertical configuration,supplemented by detailed structural analysis.In particular,the large cantilever effect of the building can be well realized through the local transfer by bracing with a reliable,direct and concise load path for vertical forces.The anti⁃progressive collapse analysis was carried out from two working conditions of removing the bracing in turn and removing all the bracings at one time.The tensile capacity of floor system was checked against two cases of completely ignoring the effect of slabs and considering the construction simulation of post⁃pouring relevant floor slabs.The fine finite element analysis of the beam⁃bracing transfer connection was performed.Finally,through further check,it can be well ensured that the proposed performance⁃based design goals can be reached under different levels of earthquakes.

关 键 词：高层建筑 斜撑转换 抗连续倒塌分析 墙体偏拉 重力二阶效应 

分 类 号：TU393[建筑科学—结构工程]