某项目双曲屋面罩棚ETFE气枕结构设计  

ETFE Cushion Structural Design of Hyperbolic Roof in a Project

作　　者：张增球 区彤 傅剑波 ZHANG Zengqiu;OU Tong;FU Jianbo(Guangdong Architectural Design&Research Institute Co.,LTD.,Guangzhou 510010,China)

机构地区：[1]广东省建筑设计研究院有限公司,广州510010

出　　处：《结构工程师》2023年第6期189-196,共8页Structural Engineers

摘　　要：ETFE气枕膜结构作为一种新型结构体系,质量轻,透光率高,带有自洁属性,被广泛应用于大跨度建筑领域。以某实际工程项目为例,对结构设计中的难点及创新工作进行了阐述。该项目的屋面罩棚结构采用了单层钢结构网壳支撑骨架加ETFE气枕组合结构体系。对轻质屋面罩棚单层网壳骨架及单元气枕结构进行了抗风稳定性和承载力的验算,结果表明,单层网壳支撑骨架及单元气枕的抗风性能满足设计要求。结合本项目气枕结构的特点,提出了一种可应对强台风的ETFE气枕内压控制方法,保证屋面气枕单元结构在极端天气下的正常工作。对本项目的单层网壳骨架重要节点——“米”字形铸钢节点,进行了选型研究和分析,使节点标准统一,方便加工和制作。As a new type of structural system,ETFE cushion membrane structure has been widely used in large-span buildings due to its light weight,high light transmittance and self-cleaning properties.Taking practical engineering application as an example,this paper expounds the difficulties and innovative work in the design.The roof canopy structure adopts a single-layer steel structure reticulated shell support skeleton and ETFE cushion membrane composite structure system.Under the action of strong winds,the wind stability and bearing capacity of single-layer reticulated shell skeleton and unit cushion structure of lightweight roof canopy are checked.The results show that the wind resistance of single-layer reticulated shell skeleton and unit cushion structure meets the design requirements.Combined with the characteristics of the cushion structure of this project,an innovative ETFE cushion internal pressure control method that can cope with strong typhoon is proposed to ensure the normal operation of the roof cushion unit structure in extreme weather.In order to unify the standards of the nodes and facilitate their processing and production,the important node of the single-layer reticulated shell skeleton of this project which is cast steel node was selected and analyzed.

关 键 词：屋面罩棚 ETFE气枕 支撑骨架 单层网壳 内压控制 

分 类 号：TU383[建筑科学—结构工程]