建筑结构学报2024，Vol.45Issue(4)：177-188,12.DOI:10.14006/j.jzjgxb.2023.A061
腐蚀损伤Q690E钢板单调拉伸性能与滞回性能研究
Monotonic tensile behavior and hysteretic behavior of Q690E steel plate with corrosion damage
摘要
Abstract
To investigate the influences of the corrosion damage on the monotonic tensile and hysteretic behavior of Q690E steel plate,artificially accelerated corrosion test was conducted to obtain the corroded specimens.Then coupon test and the uniaxially cyclic loading test were performed on the specimens with different corrosion degrees.Based on the tensile tests,the nominal yield stress,nominal tensile strength,yield-to-strength ratio and the final elongation of each specimen were captured and the regression relationships between these parameters and corrosion degree were determined.According to the cyclic tests,the effects of the corrosion damage on the stress-strain hysteretic curves,low cycle fatigue life,cyclic softening and energy dissipation were analyzed.The experimental results reveal that the tensile properties of Q690E steel plate decrease linearly with the increase of corrosion damage degree,and the degradation of the deformability is higher than that of strength.Besides,the deterioration of high strength steel induced by corrosion damage is severer than that of the low carbon steel.In terms of the hysteretic performance,corrosion damage would cause reduction of the fatigue life and the degradation and pinching of the hysteretic curves under constant-amplitude loading.Furthermore,corrosion damage would not affect the stable cyclic softening degree in steady softening stage but would influence the softening rate.Under increasing-amplitude loading,as the corrosion degree increases,the ultimate strength decreases and the energy dissipation capacity first increases then decreases.关键词
高强钢板/腐蚀损伤/强度/变形性能/滞回性能/循环软化Key words
high strength steel plate/corrosion damage/strength/deformability/hysteretic behavior/cyclic softening分类
建筑与水利引用本文复制引用
贾晨,邵永松,郭兰慧..腐蚀损伤Q690E钢板单调拉伸性能与滞回性能研究[J].建筑结构学报,2024,45(4):177-188,12.基金项目
国家自然科学基金项目(52108127),先进焊接与连接国家重点实验室开放基金项目(AWJ-23R02),吉林省科技发展计划(20220203049SF). （52108127）
