厦门白鹭体育场巨拱支承大跨度屋盖结构设计研究  

Design and research on large-span roof structure supported by mega arches of Xiamen Egret stadium

作　　者：范重 杨开 刘涛 赵长军 陈巍 胡纯炀 张宇 李劲龙 霍文营 FAN Zhong;YANG Kai;LIU Tao;ZHAO Changjun;CHEN Wei;HU Chunyang;ZHANG Yu;LI Jinlong;HUO Wenying(China Architecture Design and Research Group,Beijing 100044,China)

机构地区：[1]中国建筑设计研究院有限公司,北京100044

出　　处：《建筑结构学报》2023年第9期27-39,共13页Journal of Building Structures

基　　金：中国建筑设计研究院有限公司科技创新项目(Y2020182)。

摘　　要：厦门白鹭体育场巨拱跨度为360 m,向外侧倾斜22°,东、西两侧巨拱不对称,受力形态复杂。场芯椭圆长轴与短轴之比接近2.0,最大高差将近45 m,无法满足传统轮辐式索结构的成形要求。为了解决该问题,巨拱采用矩形截面管桁架,并通过将相邻巨拱拱脚承台连为整体等综合措施增强抗推能力。采用刚性撑杆代替部分受压下径向索,形成索-撑杆混合结构体系,并研发了带关节轴承销轴的索夹节点。分析结果表明:巨拱承担63.75%的竖向荷载,弹性屈曲因子大于10,弹塑性屈曲因子为5.9;在竖向荷载、风荷载与多遇地震作用下,巨拱的变形均较小,具有较好的刚度与稳定性;在罕遇地震作用下,巨拱基本保持弹性状态,东、西巨拱在各自的倾斜方向出现较小的残余变形;场芯轮辐式索结构采用分体模型和整体模型两阶段找形方法,可以显著减少计算工作量,加快收敛速度,成形态内环竖向坐标以及索、杆内力变化均匀连续;径向索、刚性撑杆以及环向索分别失效后,节点位移与杆件内力发生突变,经过一段时间震荡后逐渐趋于平稳,结构不会发生连续倒塌。The mega arches of Xiamen Egret stadium have a span of 360 m and an outward slope of 22°.The mega arches on the east and west sides are asymmetric,and the mechanical performance is complex.The ratio of the major axis to the minor axis of the field core ellipse is close to 2.0,and the maximum height difference is nearly 45 m,which cannot meet the forming requirements of the traditional wheel spoke cable structure.In order to solve this problem,rectangular section pipe trusses are adopted for the mega arches,and the thrust resisting ability is enhanced by taking comprehensive measures such as connecting the adjacent mega arch foot cushion caps as a whole.A cable-strut hybrid wheel spoke cable structure is formed by using rigid struts to replace partial compressed cables,and a cable clamp node with a joint bearing pin shaft is developed.The analytical results show that the mega arches bear 63.75%of the vertical load,the elastic buckling factor is greater than 10,and the elastic-plastic buckling factor is 5.9.Under the action of vertical load,wind load and frequent earthquake,the deformation of the mega arches is small,and they have good stiffness and stability.Under the action of rare earthquake,the mega arches maintain elastic behavior,and small residual deformation occurs in the east and west mega arch in their respective inclined directions.The two-stage form finding method of field core wheel spoke cable structure can significantly reduce the calculation work,accelerate the convergence speed,and the vertical coordinates of the formed inner ring and the internal force of the cable/strut change uniformly and continuously.After the failure of radial cable,rigid strut and ring cable,the nod displacements and member internal forces will suddenly change after a period of vibration,then become stable gradually,and progressive collapse of the structure will not occur.

关 键 词：大跨度屋盖 巨拱 轮辐式索结构 荷载-位移全过程分析 找形分析 断索分析 

分 类 号：TU359[建筑科学—结构工程] TU318.2