大高差轮辐结构研究与应用  

RESEARCH AND APPLICATION OF LARGE HEIGHT DIFFERENCE WHEEL SPOKE STRUCTURE

作　　者：吴浩 范重[1] 刘涛[1] 杨开[1] 张爱林 张艳霞 WU Hao;FAN Zhong;LIU Tao;YANG Kai;ZHANG Ai-lin;ZHANG Yan-xia(China Architecture Design&Research Institute,Beijing 100044,China;School of Civil Engineering and Transportation,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]中国建筑设计研究院,北京100044 [2]北京建筑大学土木与交通工程学院,北京100044

出　　处：《工程力学》2022年第S01期272-285,共14页Engineering Mechanics

基　　金：中国建筑设计研究院有限公司科技创新项目(Y2020182)。

摘　　要：针对外环高度变化较大可能引起轮辐结构径向索受压的问题,通过设置刚性撑杆代替部分受压的径向索,解决了采用传统轮辐结构无法成形的难题。推导出轮辐结构的预应力态求解公式,考虑结构自重和索夹重量等的影响,通过反复迭代确定内环各节点的标高,形成索-杆混合结构找形分析方法。对大高差轮辐结构的受力性能进行较为全面的分析,考察了外环高差、径索系杆以及附加环索等参数的影响。计算分析结果表明:大高差轮辐结构在承受长轴方向半跨活荷载和风荷载作用时较为不利,但个别径索或撑杆失效不会引起结构连续倒塌。随着外环高差加大,撑杆数量相应增多,短轴构件及长轴上径索的内力增大,长轴下径索的内力减小。在长度较大的径索中部设置系杆,能够有效地协调上、下径索之间的变形。在长轴附近设置附加环索,可以通过增强相邻径索之间的联系,提高屋面支承结构的竖向刚度。大高差轮辐结构设置刚性撑杆的成形方法已成功应用于厦门新体育中心体育场工程。According to the problem that the radial cable of a wheel spoke structure may be compressed due to the large change of the height of its outer ring,the rigid strut is introduced to replace the partially compressed radial cable,which solves the problem that the traditional wheel spoke structure cannot be formed.The prestressed state solution formula of the wheel spoke structure is deduced,considering the influence of the self-weight of the structure and the weight of the cable clamp,etc.,the elevation of each node of the inner ring is determined through repeated iterations,and the form-finding method for the hybrid cable-strut structure analysis is formed.The mechanical performance of the wheel spoke structure with large height difference is analyzed comprehensively,and the influence of the parameters such as the height difference of the outer ring,the radial cable tie rod and the additional ring cable are investigated.The analysis results show that:the wheel spoke structure with large-height-difference is relatively unfavorable when it is subjected to the half-span live load and wind loading in the long axis direction,but the failure of individual radial cables or struts will not cause the structure to collapse continuously.As the height difference of the outer ring increases,the number of struts increases accordingly,the internal force of the members on short-axis and the upper radial cable on long-axis increases,and the internal force of the lower radial cable on long-axis decreases.Tie rods are arranged in the middle of the long radial cable,which can effectively coordinate the deformation between the upper and lower radial cables.By setting additional ring cables near the long axis,the vertical stiffness of the roof support structure can be improved by strengthening the connection between the adjacent radial cables.The forming method of setting rigid struts in the wheel spoke structure with large height difference has been successfully applied to the Xiamen New Sports Center Stadium Project.

关 键 词：轮辐结构 高差 刚性撑杆 找形方法 受力性能 

分 类 号：TU399[建筑科学—结构工程]