(中机国际工程设计研究院有限责任公司， 长沙 410007)

［摘要］长沙绿地湖湘中心为满足建筑底部无柱大空间的功能要求，设置了横向转换桁架与纵向转换桁架进行二次转换，结构形式较为复杂，存在多项不规则项。针对工程设计的难点和特点，通过合理的结构布置、有效的加强措施及全面的结构计算和分析，结构能够达到规范要求的抗震设防性能目标，且保证转换桁架承载力有一定富余。并对大跨度转换结构楼盖舒适度进行了研究，分析了楼盖竖向振动特性及其在单人行走激励和多人有节奏运动激励作用下楼盖的动力响应，结果表明楼盖竖向自振频率和加速度均满足舒适度要求。 

［关键词］大跨度结构；转换桁架；楼盖自振频率；楼盖舒适度 

中图分类号：TU247-2 文献标识码：A文章编号：1002-848X(2021)21-0025-05

Design of large-span vertical and horizontal secondary truss conversion structure for Changsha Greenland Huxiang Center 

XIONG  Jiye,  WANG  Hailin,  CHEN  Jiancheng 

(China Machinery International Engineering Design & Research Institute  Co., Ltd., Changsha 410007， China) 

Abstract: In order to meet the functional requirements of a large space without columns at the bottom of the building, the Changsha Greenland Huxiang Center has set up horizontal conversion trusses and longitudinal conversion trusses for secondary conversion. The structure is complicated and there are many irregularities. In view of the difficulties and characteristics of the engineering design, reasonable structural layout, effective strengthening measures and comprehensive structural calculation and analysis were conducted to make the structure reach the seismic fortification performance target required by the code, and the transfer truss bearing capacity is guaranteed to have some surplus. The comfort of the large-span conversion structure floor was studied, the vertical vibration characteristics of the floor and the dynamic response of the floor under the excitation of single-person walking and multi-person rhythmic movement were analyzed. The results show that the vertical natural vibration frequency and acceleration of the floor meet the comfort requirements 

Keywords:large-span structure； transfer truss； floor natural frequency； floor comfort

作者简介：熊继业，学士，高级工程师，一级注册结构工程师，Email:bestbear299@qq.com。