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.
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 experiment with 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 surface were 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 a main factor to measure 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.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2004年第4期428-432,共5页
Journal of Southwest Jiaotong University
关键词
大跨度网壳结构
铸钢球节点
实体试验
试验研究
应力
reticulated shell
spherical cast-steel joint
full-scale experiment
experimental investigation
