十堰某体育馆106m跨内凹弦支穹顶结构设计关键问题研究  

Research on key problems of structural design of a 106m-span concave cable-supported domes in a gymnasium in Shiyan

作　　者：袁理明[1] 吴逸枫 陈念 董隽 王杰[1] YUAN Liming;WU Yifeng;CHEN Nian;DONG Jun;WANG Jie(Central-South Architectural Design Institute Co.,Ltd.,Wuhan 430070,China)

机构地区：[1]中南建筑设计院股份有限公司,武汉430070

出　　处：《建筑结构》2024年第2期59-64,共6页Building Structure

摘　　要：十堰某体育馆主体结构采用框架-剪力墙结构体系,上部106m大跨内凹形屋盖采用弦支穹顶结构体系。为了满足建筑简洁性及结构合理性需求,对屋盖进行了四角锥网架、弦支穹顶及网架-弦支穹顶组合的不同结构形式对比,最终选用结构轻巧、经济性好的弦支穹顶结构体系。结合弦支穹顶结构自身的受力特点以及其对下部结构的不利影响,对弦支穹顶结构上下弦布置、扭转刚度、支座约束条件、撑杆高度等进行了优化。对弦支穹顶断索情况下的响应、不同工况下的支座位移以及拉索低应力状态下的刚度退化进行了验算。结果表明,优化后的屋盖结构满足结构安全、适用性的要求,同时也有较高的冗余度。The main structure of a gymnasium in Shiyan adopts frame-shear wall structure system,and the upper 106m large-span concave roof adopts cable-supported dome structure system.In order to meet the requirements of architectural simplicity and structural rationality,different roof structure systems were compared including square pyramid space truss,cable-supported dome and the combination of both square pyramid space truss and cable-supported dome,and the cable-supported dome structure system with light structure and good economy was selected.Combined with the mechanical characteristics of the cable-supported dome structure and the adverse effects on the substructure,the top and bottom chord arrangement,torsional stiffness,support constraint conditions and strut height of the structure were optimized.The response of the cable-supported dome with broken cable,the displacement of the support under different load cases and the stiffness degradation of the cable under low stress were checked.The results show that the optimized roof structure meets the requirements of structural safety and applicability,and has high redundancy.

关 键 词：体育馆 弦支穹顶 内凹屋盖 拉索 撑杆 断索 拉索刚度退化 

分 类 号：TU393.3[建筑科学—结构工程] TU394