坑蚀钢筋应力应变曲线演化规律分析  

Analysis on the Evolution Rule of Stress-Strain Curve of Pitting Corrosion Steel Bar

作　　者：徐港[1] 梁桂林[1] 王青[1] 张懂[1] 

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《人民黄河》2013年第4期106-108,共3页Yellow River

基　　金：国家自然科学基金资助项目(51109121);中国水利水电科学研究院开放基金资助项目(IWHRKF201009);三峡大学培优基金资助项目(2012PY020)

摘　　要：通过试验和仿真分析对坑蚀钢筋应力应变关系曲线的演化规律进行了研究。结果表明:坑蚀钢筋荷载与位移关系曲线中屈服平台的缩短甚至消失与锈坑的三维尺寸有关,且受坑蚀深度变化的影响最显著;屈服平台的演化还与平均应变测量区域的大小密切相关,测量区域越小,锈坑对屈服平台的影响越显著;坑蚀程度对钢筋的工程应力应变关系有影响,但不会改变其单轴应力应变本构关系。The evolution rule of stress-strain curve of pitting COlTOsion reinforcement was studied by experiment and simulation analysis. The follow- ing conclusions are drawn from the study ： the yield platform tends to shorten and even disappear for the load-displacement curve of reinforcement af- ter pitting corrosion, which is correlated with the three-dimensional size of the rust pits, especially the depth ; the evolution of the yield platform is closely related to the area of average strain measurement, that is to say, with the smaller measurement area, the impact of the rust pit is more signif- icant; the degree of the pitting corrosion for the reinforcement has an influence to the engineering stress-strain curve, not changing the uniaxial stress-strain relationship.

关 键 词：坑蚀 钢筋 应力应变关系 屈服平台 耐久性 

分 类 号：TV332[水利工程—水工结构工程]