（北京工业大学建筑工程学院，北京 100124）
［摘要］为了研究芳纶布（AFRP）对改善腐蚀混凝土桥梁疲劳性能的效果，试验研究了不同腐蚀率对混凝土梁疲劳性能的影响；并对未加固腐蚀梁和AFRP加固腐蚀梁进行了试验对比，分析了AFRP加固不同腐蚀率钢筋混凝土梁的疲劳特性。结果表明AFRP布能显著提高腐蚀混凝土梁的疲劳寿命；加固中度腐蚀梁的疲劳寿命比其未加固梁提高约10倍，加固重度腐蚀梁的疲劳寿命比中度腐蚀未加固梁提高了20％。
［关键词］腐蚀；AFRP布；加固；疲劳；混凝土梁
Experimental study on fatigue performance of corroded RC beams strengthened with AFRP sheets
Deng Zongcai，Zhang Lianpu，Zhang Pengfei，Lin Hefei(College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China)
Abstract:In order to research the strengthening effects of AFRP on the fatigue behaviors of the corroded steel reinforced concrete beams, the fatigue properties of RC corroded beams strengthened with AFRP sheets under different ratio of corrosion are researched experimentally inhere, and compared with that of un-strengthened corroded beams and AFRP-strengthened corroded beams. The fatigue performance of AFRP-strengthened corroded beams under different ratio of corrosion is discussed. The results show that compared with un-strengthened moderate corroded beams, the fatigue life of moderate corroded RC beams strengthened with AFRP sheets is increased by 10 times, and increased by 20％ for severe corroded RC beams strengthened with AFRP sheets, which indicates that the AFRP sheet can improve significantly the fatigue performance of RC corroded beams.
Keywords:corrosion; AFRP sheet; strengthening; fatigue; concrete beam
国家自然科学基金项目（50678011），北京市自然科学基金项目（8082002），教育部博士点基金（200800050012）。
作者简介：邓宗才，博士，教授， Email：dengzc@bjut.edu.cn。
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