Structural performance of steel tubular X-joints with uniform pitting under axial compression

IF 4.6 2区工程技术 Q1 ENGINEERING, CIVIL

Ocean Engineering Pub Date : 2025-04-30 DOI:10.1016/j.oceaneng.2025.121334

Xiaoyu Yan , Jie Sheng , Zhanguo Ma , Xinyi Song , Lvyuan Zhou , Zongxing Zhang , Yuner Huang , Hongfei Chang

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引用次数: 0

Abstract

Tubular X-joints are commonly used in harsh environment that make them prone to pitting corrosion. This necessitates the evaluation of their load-bearing performance after corrosion. This study examines the influence of pitting corrosion on the structural performance of CHS X-joints, and the effects of pit size and shape on the weakening degree of bearing capacity were analyzed. Compression tests were conducted on four tubular X-joints with mechanically drilled pits of different depths. The results show that the ultimate strength and initial stiffness of test specimens reduced with pit depth, with maximum reductions reaching 49.20 % and 36.15 %, respectively. Finite element parameter analysis model verified by experiments considers the influence of pit size and shape on bearing capacity. The results indicate that the influence of pit diameter is greater than that of depth. When the pit spacing is in the range of 15 mm–20 mm, the ultimate strength and initial stiffness of the X-joint are less affected by the variation of pit spacing. The spherical pit is the most detrimental to the compressive capacity of the X-joint, followed by the cylindrical pit under the same corrosion level.

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轴压下均匀点蚀钢管x形接头的结构性能

管状x形接头通常用于恶劣环境，容易发生点蚀。这就需要对其腐蚀后的承载性能进行评估。本研究考察了点蚀对CHS x型节点结构性能的影响，分析了点蚀尺寸和点蚀形状对承载力弱化程度的影响。对4个不同深度机械钻孔的管状x形接头进行了压缩试验。结果表明：试件的极限强度和初始刚度随坑深的增大而减小，最大降幅分别达到49.20%和36.15%；经试验验证的有限元参数分析模型考虑了基坑尺寸和形状对承载力的影响。结果表明，坑径的影响大于深度的影响。当坑距在15 mm ~ 20 mm范围内时，x节点的极限强度和初始刚度受坑距变化的影响较小。在相同腐蚀水平下，球形凹坑对x形接头抗压能力的影响最大，其次是圆柱形凹坑。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ocean Engineering 工程技术-工程：大洋

CiteScore

7.30

自引率

34.00%

发文量

2379

审稿时长

8.1 months

期刊介绍： Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.