一种新型装配式索结构研究  

Study on a New Type of Assembled Cable Structure

作　　者：张立乾 杨延军[2] 张孝春[2] 彭勇[2] 赵如月 ZHANG Li-qian;YANG Yan-jun;ZHANG Xiao-chun;PENG Yong;ZHAO Ru-yue(Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China;63926 Unit of the Chinese People's Liberation Army,Beijing 100192,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]中国人民解放军63926部队,北京100192

出　　处：《价值工程》2025年第12期46-49,共4页Value Engineering

摘　　要：创新提出了通过跨中设置的三角架实现支距的空间交错布设的上下弦索的新型装配式帐篷索结构承载方案,通过张拉主动索产生整个索体结构需要的应力,以使索结构产生合理的索刚度,从而控制索结构在外载作用下的挠度,将其限定在允许的范围内。基于对索结构型式阐释、承载能力分析以及流场体型系数的研究,得出以下结论:(1)新型装配式帐篷索结构选型科学合理,在充分发挥材料优势基础上以很小的结构自重实现了较大跨径的帐篷架设;(2)在8级风力作用下,跨径30m的帐篷索结构最大索力能控制在250kN以内,跨中结构最大挠度能控制在500mm以内;(3)对帐篷结构流体CFD计算表明:帐篷结构最大体型系数分布点位于结构两侧折点处,帐篷迎风边侧体型系数的分布特点是从下而上风荷载由压力变为吸力;帐篷顶部体型系数负值,由大到小再小变大;帐篷背风边侧的体型系数分布较为均匀,均为吸力。帐篷顶部的体型系数均值为-0.92,风荷载计算上体型系数取值-1.3是偏于安全的。This paper innovatively proposed a new type of assembled barrier cable structure with staggered arrangement of upper and lower chord cables through a triangular frame set in the middle of the span,which generates the required stress of the entire cable structure by tensioning the active cable to generate reasonable cable stiffness,thereby controlling the deflection of the cable structure under external loads and limiting it to the allowable range.Based on the interpretation of cable structure types,analysis of load-bearing capacity,and research on flow field shape coefficients,the following conclusions are drawn:①The selection of a new type of prefabricated barrier cable structure is scientific and reasonable,and on the basis of fully utilizing material advantages,the barrier installation of a larger span is achieved with a very small structural weight.②②Under the action of level 8 wind force,the maximum cable force of the barrier cable structure with a span of 30m can be controlled within 250kN,and the maximum deflection of the mid span structure can be controlled within 500mm.③The CFD calculation of the barrier structure fluid shows that the maximum body shape coefficient distribution point of the barrier structure is located at the turning points on both sides of the structure,and the distribution characteristic of the body shape coefficient on the windward side of the barrier is that the wind load changes from pressure to suction from bottom to top.The body shape coefficient at the top of the barrier is negative,increasing from large to small and then small.The distribution of body shape coefficients on the leeward side of the barrier is relatively uniform,all of which are suction forces.The average shape coefficient at the top of the barrier is-0.92,and the value of-1.3 for wind load calculation is biased towards safety.

关 键 词：上下弦索 主动索 索刚度 CFD 体型系数 

分 类 号：TU399[建筑科学—结构工程]