中心环-套筒节点单层网壳结构稳定性研究

RESEARCH ON THE STABILITY OF SINGLE-LAYER TRIANGULAR RETICULATED STRUCTURE WITH THE CNETER RING-SLEEVE JOINTS

将装配式节点中心环-套筒节点引入到K8单层网壳结构中,建立装配式单层网壳结构数值模型。研究中心环-套筒节点单层网壳静力稳定性能,并与刚接单层网壳结构进行比较。讨论矢跨比和跨度对结构整体稳定性能的影响。研究结果表明:最大适用跨度下中心环-套筒节点单层K8球面网壳稳定承载力约为刚接结构的62%。随矢跨比的增大,装配式单层网壳结构稳定承载力增大,结构稳定承载力随着跨度的增大而减小。

K8 reticulated shells with ring-sleeve joints have been used in single-layer reticulated shell, the numerical model of the assembled single-layer triangular spatial reticulated shell was established. The static stability of assembled single-layer K8 reticulated shells with the maximum span was analyzed in details, and compared with the reticulated shells with rigid joints. The influence of rise to span ratio and span on the stability of assembled single-layer reticulated shell was analyzed. The results showed that the load-bearing capacity of the assembled single-layer K8 reticulated shell with the maximum applicable span was about 62% of the rigid reticulated shell. With the increase of the ratio of rise to span, the load-bearing capacity of the assembled reticulated shell increased, and it decreased with the increase of the span.