中国航海博物馆关节轴承节点承载力试验研究

Experimental research on load capacity of the bearing joints in Chinese Navigation Museum

中国航海博物馆帆体钢结构三铰拱的3个节点及边箱梁底部节点均采用关节轴承节点的形式以满足完全铰接的构造要求。因在不同荷载组合下,节点处可能承受拉力也可能承受压力,使得轴承节点的构造极其复杂。为验证此轴承节点的受力性能和承载力,进行了一个1/2缩尺模型试验和有限元分析。试验结果表明,在3.77倍的设计荷载水平作用下节点没有发生破坏,其极限承载力完全满足设计要求。试验结果和数值分析结果表明,该节点具有足够的安全性,满足工程应用的要求。

The bearing joints were used in the three-pin arch and the side girder beam bottom in Chinese Navigation Museum in order to satisfy with the qualification of flexible joints. Both tension and compression maybe occur in this joint for different kind of load combinations, which lead to the complex structure of the bearing joint. In order to know about the behavior and ultimate capacity of this kind of joints, one specimen scaled in one-twice proportional to its prototype was tested under monotonic loadings and finite element method （FEM） analysis was carried out. There is no failure phenomenon appearing in the joint under the 3.77 times of the design load and the ultimate load capacity was satisfied with the design qualification. The test results and numerical results proved that the load capacity of the joint could be guaranteed and the performance of the joint was qualified with the engineering.