本文报道了五个三通圆柱交叉口和一根光管的弹塑性性能和塑性极限载荷（屈服点载荷）的试验结果。交叉模型由一块热轧钢板加工而成。喷嘴容器附件（或支管三通接头）承受一种加载模式:施加在喷嘴末端的内压、平面内或平面外耦合。发现面外耦合载荷是临界情况。然而，对平面外耦合数据的比较表明，限制喷嘴头的横向移动或增加容器厚度，会增加喷嘴的承载能力- 容器附件。素管承受外部力矩荷载。这些测试的结果证实了管道梁模拟的有效性。

Experimental results of elastic-plastic behavior and plastic limit loads (yield point loads) of five tee-shaped cylinder intersections and a plain pipe are reported herein. The intersecting models were machined from a single hot rolled steel plate. The nozzle-vessel attachments (or branch pipe tee connections) were subjected to one of the loading modes: internal pressure, in-plane or out-of-plane couples applied to the nozzle extremity. The out-of-plane couple loading is found be the critical case. However, a comparison of the out-of-plane couple data shows that restraining the nozzle head from lateral movement or increasing the vessel thickness, results in increased load carrying capacity of the nozzle-vessel attachment. The plain pipe was subjected to an external moment loading. The results of these test confirms the validity of a beam analogy for the pipe.