海洋平台管节点局部柔度的参数分析及其试验研究

Parametric Analysis and Experimental Study of Local Joint Flexibility for Tubular Joints of Offshore Platforms

本文运用改进的半解析法，对Ｔ、Ｙ、对称Ｋ和ＴＹ型管节点在轴力、面内及面外弯矩作用下的局部柔度进行系列计算，通过对计算结果的回归分别导出上述各型管节点局部柔度的参数公式．并且进行了几组Ｙ和ＴＹ型管节点模型的面外弯曲局部柔度试验．与国内外现有经验公式和试验结果的比较验证表明，应用这些参数公式在海洋平台总体结构分析中可准确有效地确定各型管节点的局部柔度．

In this paper,the Semi-Analytical Method is employed to calculate the local flexibility of T,Y,symmetrical K and TY type tubular joints under loading conditions of axial force, inplane bending moment and out-of-plane bending moment. Parametric formulae for evaluating the local joint flexibility of the above-mentioned types of tubular joints are obtained through regression of the data acquired from a series of calculation. Some experiments are also made to get the local flexibility on Y,TY type tubular joint models with PVC under out-of-plane bending moment. Then, to verify the formulae, the results predicted from the formulae are compared with those from the existing empirical formulae and the experimental data now availabe. It can be shown that the parametric formulae given in this paper are reliable and effective in determining the local flexibility of tubular joints in the global structural analysis of offshore structures.