1.宁夏大学 土木与水利工程学院，银川 750000;2.宁夏土木工程防震减灾工程技术研究中心，银川 750021
李鑫平（1995—），男，硕士研究生，主要从事ECC加固研究，（E-mail）lxptgzy@126.com。
车佳玲，女，博士，教授，（E-mail）che_jialing@126.com。
TU502
国家自然科学基金资助项目（52068060）。
1.School of Civil Engineering and Water Conservancy, Ningxia University, Yinchuan 750000, P. R. China;2.Ningxia Civil Engineering Research Center for Earthquake Prevention and Disaster Mitigation Engineering Technology, Yinchuan 750021, P. R. China
Supported by National Natural Science Foundation of China（52068060）.
为研究工程水泥基复合材料（ECC）与锈蚀螺纹钢筋的黏结破坏机理，采用中心拉拔试验方法，分析钢筋锈蚀率、黏结锚固长度、钢筋直径和纤维掺量等因素对黏结性能的影响。结果表明，ECC与锈蚀钢筋的黏结应力-滑移曲线可分为微滑移阶段、滑移阶段、破坏阶段和残余阶段，试件破坏类型为剪切拔出破坏；黏结强度随钢筋锈蚀率的增加先增大后减小，存在临界锈蚀率使得黏结性能最好；钢筋锈蚀率为10%时，试件黏结强度随钢筋锚固长度和钢筋直径的增大而减小；随着纤维体积掺量的增加，黏结韧性指数和黏结强度先增大后减小，纤维体积掺量为2%时，纤维的增韧和阻裂效果最明显。
This study investigates the bond failure mechanism between engineered cementitious composite (ECC) and corroded rebars through pull-out experiments. The effects of corrosion rate, bond anchorage length, rebar diameter, and fiber content on bond performance are analyzed. The results show that the bond stress-slip curve can be divided into: micro-slip, slip, failure and residual phases. All specimens exhibit shear pull-out failure as the primary failure mode. The bond strength initially increases and then decreases with the corrosion rate and there is a critical corrosion rate resulting in the warimized bond strength. For rebars with a 10% corrosion rate, bond strength decreases as anchorage length and rebar diameter increase. Additionally, increasing the fiber content enhances the bond toughness index and bond strength initially, followed by a decline. The optimum performance, including maximum toughness and crack resistance, is observed at a fiber content of 2%.
李鑫平,车佳玲,刘海峰,王丹.工程水泥基复合材料与锈蚀钢筋黏结性能研究[J].重庆大学学报,2025,48(1):90-97.
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