焊接钢管节点热点应力集中系数参数方程的适用性研究

RESEARCH ON APPLICABILITY OF STRESSCONCENTRATION FACTOR PARAMETER EQUATIONS OFWELDED STEEL TUBULAR JOINTS

由于各几何特征参数对焊接钢管节点应力集中系数影响复杂，参数方程给出的计算结果都存在不同程度的不确定性。本文在收集大量实验数据的基础上，对一些常用参数方程计算结果的不确定性进行了分析讨论，给出了各方程在不同荷载条件下计算结果的变异系数值，并对其适用性进行了评价，可为海洋平台钢管结构的疲劳可靠性分析和管节点应力计算提供参考。

Due to the complex effects of geometric parameters on the stress concentration factor(SCF) of welded steel tubular joints, there exist some uncertainties in the results obtained from theparameter equations. To take the different loading conditions into account, varying coefficients areintroduced into the parameter equations. The applicability of the resultant parameter equations isevaluated. It is believed that the present results may offer useful guidelines in fatigue reliabilityanalysis for offshore steel jackets and tubular joints.