ABSTRACT

An experiment was conducted on D36 steel plates under various corrosion scenarios. This was realised to determine the interactive effect of multiple corrosion pits on the compressive behaviour of stiffened plates and to establish a generalised design-oriented uniaxial material model for application in fibre element models to assess the strength and stability of ship structures. The performance parameters were observed to be highly sensitive to corrosion through the test. To obtain a better understanding of the transition between the two typical failure modes, i.e. strength failure and buckling failure, a parametric sensitivity analysis was performed on corroded specimens to identify the effects of some factors on the length coefficient. Using the test data, a design-oriented linear–exponential stress vs. strain material model was proposed, and it was observed that the corrosion-based exponent in this model could switch it smoothly from a bilinear form for lower corrosion cases to an exponential form for higher corrosion cases.

摘要

对 D36 钢板在各种腐蚀情况下进行了实验。这是为了确定多个腐蚀坑对加筋板压缩行为的交互影响，并建立一个面向设计的广义单轴材料模型，用于纤维单元模型，以评估船舶结构的强度和稳定性。通过测试观察到性能参数对腐蚀高度敏感。为了更好地理解两种典型失效模式之间的过渡，即强度失效和屈曲失效，对腐蚀试样进行了参数敏感性分析，以确定某些因素对长度系数的影响。使用测试数据，提出了面向设计的线性指数应力与应变材料模型，