合肥滨湖国际会展中心综合馆大跨度钢-铝组合张弦空间桁架屋盖体系设计技术研究

Research on design technology of large-span steel-aluminum composite stringed alloy truss roof system of Hefei Binhu International Convention and Exhibition Center Complex

针对合肥滨湖国际会展中心综合馆大跨度屋盖,提出一种钢-铝组合张弦空间桁架新型受力体系,其中上部组合桁架的下弦杆、腹杆采用钢构件,组合桁架上弦杆采用铝合金型材,撑杆和拉索为钢结构,该体系集合了传统张弦桁架空间受力特点和铝合金结构的优点,形成铝合金主结构与屋盖围护系统一体化设计。介绍了屋盖受力体系的构成、钢-铝合金连接节点、一体化屋面和张弦桁架的分析设计结果,同时研究了屋盖结构的稳定性、抗连续倒塌等问题。分析结果表明,屋盖体系各项指标均满足规范要求,可为钢-铝合金组合空间桁架结构体系的研究和应用提供参考。

According to the large-span roof of Hefei Binhu International Convention and Exhibition Center Complex,a new type steel-aluminum composite stringed alloy truss fore system was proposed.The lower chords and webs of the upper composite truss are steel members,the upper chords of the composite truss are aluminum alloy profiles,and the braces and cables are steel structures.This system combines the characteristics of traditional truss string structure and the advantages of aluminum alloy structure,forming an integrated design of aluminum alloy main structure and roof enclosure system.The structure of the roof structure,steel-aluminum alloy joints,analysis and design results of integrated roof and truss string were introduced,and the stability and resistance to continuous collapse of the roof structure were studied.The analysis results show that all the indexes of the roof system meet the requirements of the code,which provides a reference for the development of the steel-aluminum composite alloy truss structural system.