直腹桁架转换形式在高层结构设计中的应用

Application of Vierendeel Truss Transfer Structure in High-rise Buildings

本工程为上海市某一高层部分框支剪力墙结构,转换层采用了直腹桁架转换形式,在保证转换层构件强度和刚度的同时,相比同类梁式减轻了自重,相比同类空腹桁架降低了施工难度,同时桁架洞口为日常设备使用与维修提供了诸多方便。基于结构抗震性能设计方法,采用PKPM软件对整体结构进行了小震弹性时程分析(EDA),采用Midas软件对整体结构进行了大震静力弹塑性时程分析(PUSHOVER);采用Midas软件对转换构件进行了有限元分析。参数计算结果表明,整体结构空间工作性状良好,能够满足底部大跨度和工程抗震要求。

This project is one of high-rise buildings using the frame shear wall structure in Shanghai. The transformation layer adopted straight abdominal truss transfer form. Comparing with traditional beam-type transfer structure, vierendeel truss transfer structure has great advantage in civil engineering construction. Vierendeel truss transfer structure can solve better the problems of overlarge planes of the section and the abrupt change of structure stiffness, etc. At the same time truss hole provides convenient for daily equipment use and maintenance. Based on the structural sesmic design method, PKPM software was used to do an Elastic Dynamic Analysis （EDA） of the overall structure for the small earthquakes, Midas software was used to do a PUSHOVER analysis of the whole structure. With Midas software we have carried out a finite element analysis of conversion component. Parametric study showed that the space work characteristic of the overall structure is good. It can meet the seismic requirement for the large span at the bottom.