（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］2019北京世园会植物馆建筑设计理念为“升起的地平”，造型奇特、受力复杂，温室内为高温高湿环境，具有一定的工程代表性：采用框架+ V柱的结构体系，其中V柱减小了结构跨度，满足了结构受力要求，实现了建筑结构的完美结合；地基采用CFG桩复合地基，有地下室部分基础采用梁板式筏形基础，非地下室部分基础采用独立基础；对温室屋顶40m单层网壳的稳定分析，表明结构稳定承载力满足设计要求；通过设置悬挂在V柱上的不锈钢拉索，以及步道与楼面连接处的抗扭构造措施，保障了旋转步道的结构安全和舒适度；为减轻结构自重，部分屋面板采用轻质钢边框屋面板，经检测承载力均满足设计要求；针对温室内钢结构在高温高湿环境下的防腐需求，设计了配套的防腐涂层系统，并采用不锈钢拉索保证拉索防腐性能；在建筑四周设置了自屋顶下挂的根须，根须材质根据受力选择铝管和钢管两种，以期为其他植物园结构的设计提供参考。

［关键词］2019北京世园会； 植物馆； 膜结构； 网壳结构； 温室内旋转步道； 防腐蚀设计； 动力分析

中图分类号：TU318文献标识码：A文章编号：1002-848X(2019)17-0034-05

Structural design on  Botanical Garden of International Horticultural Exhibition 2019, Beijing, China

Zhou Zhongfa， Zhu Zhongyi， Qin Kai， Duan Shichang， Xing Juehui

(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:The architectural design concept of  Botanical Garden of International Horticultural Exhibition 2019, Beijing, China is “the rised ground”. The project is unique in shape and having complicated structural load paths. The interior of the greenhouse is a high-temperature and high-humidity environment which represent a certain type of project. The structure adopts a structural system with frame + V-column. The V-column reduces the structural span to satisfy the structural strength requirements, and realizes the perfect combination of architectural aesthetic and structures performance. The foundation is CFG pile-combined foundation, beam-plate type raft foundation was used for the foundation with basement, and independent foundation was used for foundation without basement. The stability analysis of the 40-meter span single-layer reticulated shell on the greenhouse roof shows that the stability of the structure meets the design requirements. The structural safety and comfort of the rotating walkway were ensured by providing stainless steel cables suspended from the V-column and torsion resistance construction at the joint between floor slab and walkway. In order to reduce the structural weight, some roof panels use light steel frame panels, and these panels were tested to ensure their strength capacity meets the design requirements. For the anti-corrosion demand of steel structure in greenhouse under high temperature and high humidity environment, the corresponding anti-corrosion coating system was designed, and the stainless steel cable was used to ensure the anticorrosion performance of the cable. The roots were suspended from the roof around the building. The material of the roots was selected from aluminum tube and steel tube based on the force. All above is to provide design reference for other similar botanical structures.

Keywords:International Horticultural Exhibition 2019, Beijing, China; Botanical Garden; membrane structure； reticulated shell； rotating walkway in the greenhouse； anti-corrosion design； dynamic analysis

作者简介：周忠发，硕士，高级工程师，一级注册结构工程师，Email：254149547@qq.com。