锈蚀钢筋与混凝土的环向粘结试验研究

胡秉偃; 邢锋; 赵羽习; 金伟良

doi:10.13204/j.gyjz201105008

锈蚀钢筋与混凝土的环向粘结试验研究

doi: 10.13204/j.gyjz201105008

1.
1. 浙江大学结构工程研究所,杭州310027;
2.
2. 深圳大学结构工程研究所,广东深圳518060

基金项目:

国家自然科学基金项目(50808157);深圳市土木工程重点实验室资助项目(SZDCCE09-12)

详细信息

作者简介:
第一作者：胡秉偃, 男, 1987年出生, 硕士研究生。E-mail：demonhunter_hu@126.com

中图分类号: TU375
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- 文章访问数: 87
- HTML全文浏览量: 19
- PDF下载量: 37
- 被引次数: 0
出版历程
- 收稿日期: 2010-05-23
- 刊出日期: 2011-05-20

EXPERIMENTAL STUDY ON HOOP BOND BETWEEN CORROSION BAR AND CONCRETE

1.
1. Structure Engineering Institute,Zhejiang University,Hangzhou 310027,China;
2.
2. Structure Engineering Institute,Shengzhen University,Shengzhen 518060,China

摘要

摘要: 研究锈蚀钢筋与混凝土的环向粘结性能，对预测钢筋混凝土内裂时刻具有重要意义。考虑混凝土强度与钢筋类型两种影响因素进行钢筋混凝土扭转试件设计，利用恒电流通电法对试件进行加速锈蚀，采用扭矩扳手加载，并用倾角仪记录钢筋与混凝土之间的相对转角。试验结果表明：光圆钢筋试块的极限抗扭承载力和抗扭刚度均小于变形钢筋；对于变形钢筋，较小的钢筋锈蚀量对于试件的环向粘结剪应力影响很小，当锈蚀率达到一定程度时环向粘结剪应力开始下降。对于光圆钢筋，由于钢筋锈蚀引起的附加机械咬合力、环向粘结应力随着锈蚀率增加而增加，钢筋锈蚀量达到一定程度后，环向粘结应力开始下降，但下降的速率不大。
- 环向粘结 /
- 钢筋锈蚀 /
- 钢筋混凝土
Abstract: The hoop bond performance between corroded rebar and concrete was explored in this paper.The research is significant to the prediction of time when the internal cracking due to corrosion happened.Concrete strength and type of rebar was taken into account at the design of torsion specimen.In the test, constant current was used to accelerate corrosion course.Torque wrench was the loading tool.The relative angle between concrete and rebar was recorded by use of clinometer.The results indicate that the ultimate torsional bearing capacity and torsional rigidity of plain round bar are less than deformed rebar.The ring bonding shear strength is steady when the corrosion level is small for the deformed rebar.When the corrosion level reaches a certain extent, the ring bonding shear strength begins to decrease.Because of additional mechanical bite force, the hoop bonding shear strength is increased with corrosion level.When the corrosion level reaches a certain extent, the hoop bonding shear strength decreases in a smaller rate.
- hoop bond /
- corrosion of rebar /
- reinforced concrete

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参考文献(8)

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