土木与环境工程学报（中英文）2025，Vol.47Issue(4)：88-99,12.DOI:10.11835/j.issn.2096-6717.2023.062
锈蚀PC梁疲劳寿命预测及界面滑移区量化研究
Fatigue life prediction and interface slip zone quantitative study of corroded PC beams
摘要
Abstract
The combined effects of repeated load and corrosion could cause fatigue damage of prestressed concrete(PC)beams,which would reduce their service life.The fatigue crack growth size of strand and cumulative residual strain of concrete were taken as damage parameters in the present study,a quantitative method of uncoordinated deformation in bond-slip zone considering the residual strain of strands and steel bars and a fatigue life prediction method of corroded PC beams were proposed.The methods comprehensively consider the influence of fatigue crack growth of steel strand,interface corrosion fatigue bond degradation and fatigue damage of concrete.Then the rationality of the fatigue life prediction method was verified by experimental data,and the interfacial fatigue bond-slip of corroded PC beams under different prestresses,corrosion degrees and stress levels were discussed.Results show that the proposed methods can effectively predict the interface slip and the fatigue life of corroded PC beams.The prestress is an important parameter that affects the fatigue bond-slip of corroded PC beams.With the increase of corrosion loss and stress level,the specimen is prone to occur the fatigue bond-slip,and the increase of prestress force can effectively reduce the interfacial fatigue bond-slip.At the high stress levels,the more serious strain incompatibility would lead to more residual slip,the slip curve and its slope would rise and steepen as the stress level increases.关键词
预应力混凝土/锈蚀/疲劳寿命/应力水平/粘结滑移Key words
prestressed concrete/corrosion/fatigue life/stress level/bond-slip分类
建筑与水利引用本文复制引用
戴理朝,刘静瑾,涂荣辉,王磊..锈蚀PC梁疲劳寿命预测及界面滑移区量化研究[J].土木与环境工程学报（中英文）,2025,47(4):88-99,12.基金项目
国家自然科学基金(52008035、52278140) （52008035、52278140）
国家重点研发计划(2021YFB2600900) （2021YFB2600900）
湖南省自然科学基金(2020JJ1006、2021JJ40574) （2020JJ1006、2021JJ40574）
湖南省研究生科研创新项目(CX20210779) National Natural Science Foundation of China(Nos.52008035,52278140) （CX20210779）
National Key Research and Development Program of China(No.2021YFB2600900) （No.2021YFB2600900）
Natural Science Foundation of Hunan Province(Nos.2020JJ1006,2021JJ40574) （Nos.2020JJ1006,2021JJ40574）
Postgraduates Scientific Research Innovation Project of Hunan Province(No.CX20210779) （No.CX20210779）
