| 摘要: |
| 为研究锈蚀钢筋沿长度方向的锈蚀率变化规律及其对锈蚀钢筋力学性能的影响，对混凝土板中钢筋进行了电化学加速锈蚀试验.结果表明：通过控制混凝土密实度及浸泡方式，采用电化学加速锈蚀试验，可以得到沿截面及长度方向不均匀锈蚀的钢筋.锈蚀钢筋屈服荷载、极限荷载与微段最大锈蚀率有较大的相关性，且沿长度方向不均匀锈蚀参数随其平均质量损失率增加而增大.用微段最大锈蚀率计算得到的锈蚀钢筋屈服荷载预测值与试验值较为接近，可为相关研究提供参考. |
| 关键词: 不均匀 锈蚀 钢筋 长度表征 力学性能 |
| DOI：103969/j.issn1007 9629201603026 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51108179，51308213）；河南省教育厅项目（13B560113） |
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| Mechanical Properties of Non uniformly Corroded Steel Bars Based on Length Characterization |
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QU Fulai, LIU Guirong, ZHAO Shunbo, YAN Leiyuan
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School of Civil Engineering and Communication, North China University of Water Resources andElectric Power, Zhengzhou 450045, China
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| Abstract: |
| To investigate the change law of corrosion rate along the length direction of steel bars and its effect on mechanical properties of corroded steel bars, electrochemical acceleration corrosion experiments of concrete slabs were carried out. Results indicate that the non uniform corrosion steel bars can be obtained through use of direct current method by controlling the concrete density and immersing method of specimen. Furthermore, it is found that the yield load and ultimate load of non uniformly corroded steel bars under tension are more relevant with the maximum segment corrosion rate. And the value of parameter reflecting length characterization increases with average mass loss rate of corroded steel bars. Finally, the predicted loads expressed by the maximum segment corrosion rate are close to those of the experiments, which may be as references for other related researches. |
| Key words: non uniform corrosion steel bar length characterization mechanical property |
