【摘要】 大型海洋工程结构多常用钢管桩,在钢管桩的制作和安装过程中通常会产生环向对接焊缝,由管节偏位引起的环向焊缝应力集中现象是焊缝疲劳热点应力评估和焊缝疲劳安全分析的重要影响因素。通过实用近似分析方法,研究在轴向拉力和平面内弯矩单独作用下等壁厚对接焊缝应力集中问题,得出等壁厚拉弯构件对接焊缝应力集中系数的近似计算公式;根据对钢管桩模型案例的试算,该近似公式的计算结果与ANSYS有限元数值模拟结果非常接近,可供实际工程参考。更多还原

【Abstract】 Steel pipe piles are widely applied in large marine structure projects.Hoop butt-jointed welds are usually generated during the fabrication and installation of steel piles.The stress concentration at hoop butt-jointed welds caused by socket misalignment is an important factor which affects the hotspot stress evaluation and the safety analysis of fatigue welds.By the approximate analysis method,we research the stress concentration at the butt-jointed weld between the steel pipe piles in identical wall thickness under axial tension or in-plane bending moment,and furthermore develop an approximate formula for the stress concentration factor at the butt-jointed weld between the bending structures in identical wall thickness.According to a trial calculation of steel pipe piles model,the result by the approximate formula is very close to the value by ANSYS finite element numerical simulation,which will provide references for similar projects.更多还原