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旨在研究双轴压缩下点状腐蚀对低碳钢矩形板极限承载力的影响,拓展已有的单轴压缩研究结果。通过改变凹痕和板件的几何特性,如凹痕的半径、深度和位置以及板材的长细比等,对局部出现点状腐蚀的钢板进行了一系列有限元分析。分析结果表明,体积损失和载荷比都将降低带凹痕低碳钢板的受压承载力。板材长细比对双轴交互作用的曲线形状有相当大的影响。对有限元结果进行回归分析,考虑到体积损失和载荷比的影响,对带凹痕钢板的残余强度进行渐近计算。提出的公式有助于快速估计船舶永久设计中局部出现点状腐蚀的钢板的残余强度,便于制定老化的船舶结构和构件的维修方案。
The aim is to study the influence of pitting corrosion under biaxial compression on the ultimate bearing capacity of mild steel rectangular plates, and expand the existing uniaxial compression research results. By changing the indentation and the geometric characteristics of the plate, such as the radius, depth and position of the indentation and the slenderness ratio of the plate, a series of finite element analyzes were carried out on the plate with localized corrosion. The analysis results show that both the volume loss and the load ratio will reduce the compressive bearing capacity of the densified mild steel. Plate slenderness has a considerable effect on the shape of the biaxial interaction curve. Regression analysis of the finite element results, taking into account the impact of volume loss and load ratio, asymptotic calculation of the residual strength of notched steel. The proposed formula can help to quickly estimate the residual strength of spot-eroded steel plate in the permanent design of the ship and to make the maintenance plan of aged ship structure and components.