铁道科学与工程学报2012，Vol.9Issue(6)：13-17,5.
无粘结预应力钢绞线锈蚀损伤分析
Corrosion damage analysis of unbonded prestressed steel strand
摘要
Abstract
Based on the accelerated corrosion tests, the variation regulations of unbonded prestressed steel strand' s mechanical performance along with corrosion ratio changed in different corrosion conditions were studied. By a comparative analysis of the steel strand difference of nominal ultimate strength, nominal elastic modulus and elongation ratio under the normal corrosion and the partial corrosion, it was put forward tha the corrosion damage of steel strand without regard to the factor of cross - section reduction. The results show that the influence corrosion has on steel strand mechanic performance is not merely cross - section reduction, and the primary cause of corrosion damage lays in the stress concentration phenomenon caused by the pit of corrosion. By a comparative analysis of the difference of mechanical performance under normal corrosion and partial corrosion, corrosion damage proportion of nominal ultimate strength ignoring the factor of cross - section reduction is obtained. By analys-izing of corrosion damage about steel strand, the relationship between corrosion rate and the corrosion damage variable is also obtained.关键词
锈蚀/钢绞线/力学性能/锈蚀损伤比/锈蚀损伤变量Key words
corrosion/ steel strand/ mechanical performance/ corrosion damage proportion/ corrosion damage variable分类
建筑与水利引用本文复制引用
李政,罗小勇..无粘结预应力钢绞线锈蚀损伤分析[J].铁道科学与工程学报,2012,9(6):13-17,5.基金项目
国家自然科学基金资助项目(51178470) （51178470）
