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基于圆环模型给出了Ｔ、Ｘ型管接头在轴压下极限强度的半经验公式，其中圆环的等效长度由试验结果进行回归．预测的极限载荷与实验数据符合较好．
Based on the toroidal model, the semi-empirical formula of the ultimate strength of T, X-shaped pipe joints under axial compression is given, in which the equivalent length of annular ring is regressed by the test results. The predicted ultimate load is in good agreement with the experimental data.