（郑州大学综合设计研究院有限公司， 郑州 450002）

［摘要］CRB600H高延性冷轧带肋钢筋是我国近年来研制开发的强度高、延性好的新型小直径带肋钢筋。混凝土板类构件的受力钢筋和构造钢筋采用CRBH600H钢筋后可明显减少钢筋用量，取得较好社会和经济效益。结合CRB600H钢筋施工中调直以及由于各种原因现场暴露较长时间出现锈蚀的现象，针对钢筋调直前后以及暴露30d和120d锈蚀后的重量偏差、力学和锚固性能进行了试验和分析。结果表明CRB600H钢筋调直、现场暴露一定时间锈蚀后的重量偏差、强度和伸长率虽有波动，但仍能符合规范要求；锈蚀钢筋与混凝土的黏结强度有所降低，暴露120d后钢筋的锈蚀可能影响工程质量，采用常规方法除锈后可消除这种影响，并提出了相应的处理建议，可供CRB600H钢筋及其他小直径钢筋在工程应用中参考。

［关键词］高延性冷轧带肋钢筋；小直径钢筋；钢筋调直；锈蚀钢筋；黏结强度；力学性能；锚固性能

中图分类号：TU375-2文献标识码：A文章编号：1002-848X(2021)09-0056-07

Experimental study on influence of straightening and corrosion on CRB600H steel bars mechanical and anchorage performance

LIU Jiahui, LIU Lixin

(Zhengzhou University Comprehensive Design and Research Institute  Co., Ltd., Zhengzhou 450002, China)

Abstract:CRB600H cold rolled ribbed steel bars with improved elongation is a new small-diameter ribbed steel bars with high strength and good ductility developed in recent years in China. The amount of the steel bars used in concrete slabs can be reduced obviously and the social and economic benefits can be obtained when using of CRBH600H steel bars for forced steel bars and structural steel bars. Combined with the CRB600H steel bar straightening in the construction site and exposing for a period of time corrosion phenomenon due to various reasons, the weight deviation, mechanical and anchorage performance of steel bar before and after straightening, after exposed for 30d and 120d to surface corrosion were tested and analyzed. The results show that the weight deviation, strength and elongation of CRB600H steel bar after straightening and surface corrosion fluctuate but still meet the requirements of the code, the bond anchoring strength between corroded steel bar and concrete is reduced, after exposed for 120d the corrosion of steel bar may affect the engineering quality, this influence can be eliminated by conventional method, and some suggestions are put forward for the application of CRB600H steel bars and other small-diameter steel bars in engineering.

Keywords:cold rolled ribbed steel bars with improved elongation; small-diameter steel bar; straightening of steel bar; corroded steel bar; bond anchoring strength; mechanical performance; anchorage performance

作者简介：刘家慧，学士，高级工程师，Email：79141192@qq.com。