西南交通大学学报 2004, 39(4) 428-432 DOI:     ISSN: 0258-2724 CN: 51-1277/U

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网壳结构
铸钢球节点
实体试验
试验研究
本文作者相关文章
卫星
李 俊
强士中
PubMed
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大跨度网壳结构铸钢球节点实体试验研究

卫星;李 俊;强士中

西南交通大学土木工程学院,四川成都610031

摘要

通过对重庆奥林匹克体育中心体育场网壳结构铸钢球节点结构的实体试验,获得了球节点表面各测点 应力值.结合理论计算和实体试验,对铸钢球节点的受力特点及传力路径进行了分析,指出其应力从管身到球体 的变化规律.根据试验得到的铸钢球节点实际应力分布情况,按Mises强度理论对其承载能力进行了评价.将铸 钢球节点管身应力与管脚应力的比值作为反映应力集中程度的重要指标,对此比值进行了分析并指出,大型铸 钢球节点设计时,可以通过控制该应力比值优化应力传递路径.

关键词 网壳结构   铸钢球节点   实体试验   试验研究  

Full-Scale Experiment on Spherical Cast-Steel Joint of Long-Span Reticulated Shells

WEIXing; LIJun;QIANG Shi-zhong

School of Civil Eng., Southwest Jiaotong University, Chengdu 610031, China

Abstract:

Through a full-scale experiment on the spherical cast-steel joint of reticulated shells of the Chongqing Olympic Stadium, stresses on the cast-steel joint were obtained. By combining the full-scale experimentwith a theoretical analysis, static behaviors of the cast-steel joint and the pathway of stress transfer were analyzed, and the differences between distributions of stresses on pipe shaft and spherical joint surfacewere pointed out. From the stress distribution obtained through the experiment, the security and load-bearing capacity of the spherical cast-steel joint were evaluated based on the Mises strength criterion. In addition, the ratio of stresses on pipe shaft and pipe foot, as amain factortomeasure the degree of stress concentration, was also analyzed. It was put forward that the distribution of stresses on a large spherical cast-steel joint can be improved by controlling the ratio of stresses.

Keywords: spherical cast-steel joint   full-scale experiment   experimental investigatio    reticulated shell  
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