作　　者： ; ; ; ;

机构地区： 中交四航工程研究院有限公司

出　　处： 《水运工程》 2010年第10期119-123,共5页

摘　　要： 给出CFRP布加固锈蚀RC梁抗弯承载能力试验研究的结果。共浇筑了10根试件(150mm×250mm×1400mm),其中2根试件作为基准梁既不腐蚀也不加固,2根试件进行腐蚀但不加固,其余6根试件腐蚀后并用不同层数CFRP布加固。腐蚀试件的锈胀裂缝宽度均达到0.3mm。四点弯曲抗弯承载力试验研究结果表明:钢筋锈蚀质量损失小于5%时,结构的承载能力没有明显退化;粘贴1层、2层和3层CFRP加固腐蚀梁的极限荷载相对未加固梁的极限荷载分别平均提高了29.3%,41.8%和57.0%。此外,在腐蚀较为严重的华南沿海某码头结构加固工程中的成功应用表明,采用碳纤维布加固腐蚀码头结构,效果良好。 Corrosion of steel reinforcement is one of the main durability problems facing worldwide use of reinforced concrete.This paper presents the results of an experimental study to evaluate the flexural capacity of corrosion-damaged beams repaired with carbon fiber reinforced polymer （CFRP） sheets.Ten beam specimens （150 mm×250 mm×1 400 mm） were constructed.Two specimens were neither strengthened nor corroded to serve as a reference.Two specimens were corroded and not repaired.The remaining six beams were corroded and repaired with different layers of CFRP sheets.The CFRP sheets were applied after the main reinforcing bars were corroded to the appearance of longitudinal cracks with a 0.3mm width.The experimental results show that the number of CFRP sheets affects the strength as well as the failure mechanisms of retrofitted RC beams.Furthermore,a repairing project using CFRP was reported to verify this strengthening method.

关 键 词： 耐久性 钢筋锈蚀 抗弯承载能力 加速腐蚀 电化学

领　　域： [建筑科学]