以不同腐蚀程度Q235钢材试验数据为基础，运用数值模拟方法对锈蚀钢材的屈曲性能、滞回性能进行分析。结果表明，在循环荷载作用下，腐蚀试件屈曲最早发生在具有较大蚀坑的板材薄弱部位；随着腐蚀程度增加，屈曲现象明显，且提前发生；腐蚀钢材与未腐蚀钢材均出现循环硬化、峰值点指向效应等现象，但滞回环饱满程度明显降低，且腐蚀钢材各循环荷载性能指标均降低。

Based on the test data of Q235 steel with different corrosion degrees, the buckling and hysteretic properties of corroded steel are studied by numerical simulation considering the surface characteristics. The results show that under cyclic loading, the buckling of corroded specimens first occurs in the weak part of the plate with large corrosion pits. With the increase of corrosion degree, the buckling phenomenon is obvious and occurs ahead of time. Both corroded steel and non-corroded steel have cyclic hardening and peak point pointing effect, but the full degree of hysteresis loop is significantly reduced. And the performance indexes of corroded steel under cyclic loading are reduced.

TU391

中国船舶重工集团国际工程有限公司科技创新与研发项目（G22F-F01-B-t007）