轴向荷载作用下平面管式DKT节点应力集中系数分布的影响因素

尽管在海洋结构中经常采用DKT节点,但还没有有效的参数化方程能确定沿着这种节点的支撑与弦杆相交位置的应力集中系数分布。研究无量纲几何参数和支撑与弦杆相交角度对应力集中系数分布的影响,分析在平衡轴向荷载作用下,沿着焊趾方向的DKT或KT节点的应力集中系数。建立参数化方程,预估焊趾360°范围内的应力集中系数分布。该方程满足英国能源部的标准要求,可用于设计。

Geometrical Effect on SCF Distribution in Uni-Planar Tubular DKT-Joints Under Axial Loads

Despite the frequent use of DKT-joints in offshore structures, no parametric equation is available for determining the distribution of stress concentration factors (SCFs) along the brace-to-chord intersection of this type of tubular joints. In the present paper, the effect of non-dimensional geometrical parameters and brace-to-chord inclination angle on the distribution of SCFs and DKT-/KT-joint SCF ratios (SRs) along the weld toe of tubular DKT-joints under the balanced axial loads is studied. Thereafter, ...