不等高双塔楼连体结构设计  

Design of unequal⁃height double towers linked with connective structures

作　　者：吴强 戎子涵 金振奋 WU Qiang;RONG Zihan;JIN Zhenfen(The Architectural Design&Research Institute of Zhejiang University Co.,Ltd,Hangzhou 310028,China)

机构地区：[1]浙江大学建筑设计研究院有限公司,杭州310028

出　　处：《建筑结构》2023年第20期59-65,共7页Building Structure

摘　　要：项目为两栋剪力墙结构组成的不等高连体住宅楼,两栋塔楼高差非常大。双塔在高位通过钢桁架连接,钢桁架及以上钢梁与塔楼型钢混凝土柱刚性连接。通过调整结构布置,优化传力路径,协调两塔楼侧向刚度和动力特性,以减小塔楼刚度不对称导致的附加内力。通过对单塔模型和整体模型计算结果进行对比分析,发现设置连体使扭转振型提前出现,扭转振型更加复杂,对抗震不利。三水准设防下的连体桁架分析结果表明,钢桁架具有足够的承载力储备,较大的竖向刚度,且大震下基本处于弹性工作状态。对结构进行大震动力弹塑性分析,发现结构薄弱部位,并采取相应加强措施。采用拆除构件方法进行的防连续倒塌分析结果表明,连体结构的防连续倒塌性能良好。对连体桁架关键节点进行精细化分析,优化节点构造,实现了“强节点弱构件”。The project is an unequal-height connected residential towers composed of two shearwall structures,and the height difference between the two towers is very large.Two towers are connected by steel trusses at high positions,the steel trusses and steel beams above are connected to the steel-concrete columns of the towers with rigid connection.By adjusting the structure layout,optimizing the force transmission path,and coordinating the lateral stiffness and dynamic characteristics of the two towers,the additional internal force caused by the asymmetric stiffness of the towers was reduced.Based on the comparative analysis of the calculation results of the single-tower model and the overall model,it was found that the connective structures made the torsional mode appear earlier,and the torsional mode was more complex,which may cause bad effects on the seismic.The analysis result of the connective trusses under three-level fortification shows that the steel trusses have sufficient bearing capacity stock,relatively large vertical stiffness,and are basically in an elastic working state under rare earthquakes.The dynamic elastic-plastic analysis under rare earthquakes was conducted to find out weak parts of the structure,and corresponding strengthening measures were put forward.The analysis result of prevention of continuous collapse using the method of dismantling components shows that the anti continuous collapse performance of the connective structure is good.The detailed analysis of key joints of the connective trusses was carried out,and the structure of joints were optimized to ensure“strong joints and weak members”.

关 键 词：不等高双塔楼 住宅 连体结构 动力弹塑性分析 防连续倒塌分析 施工模拟 节点分析 

分 类 号：TU318[建筑科学—结构工程]