钢筋锈蚀率对钢筋与混凝土黏结性能的影响

材料导报

2019, Vol. 33

Issue (Z2): 309-316

无机非金属及其复合材料

钢筋锈蚀率对钢筋与混凝土黏结性能的影响

王朝阳^1,2, 周全¹, 杨鸥², 霍静思^2,3, 王海涛²

1 中国建筑西南设计研究院有限公司湖南分公司,长沙 410008;
2 湖南大学土木工程学院,教育部建筑安全与节能重点实验室,长沙 410082;
3 华侨大学土木工程学院,厦门 361021

Effect of Corrosion Rate of Steel Bar on Bond Performance Between Steel Barand Concrete

WANG Zhaoyang^1,2, ZHOU Quan¹, YANG Ou², HUO Jingsi^2,3, WANG Haitao²

1 China Southwest Architectural Design and Research Institute Corp., Ltd., Hunan Branch, Changsha 410008;
2 China Ministry of Education Key Laboratory of Building Safety and Energy Efficiency, College of Civil Engineering, Hunan University, Changsha 410082;
3 College of Civil Engineering, Huaqiao University, Xiamen 361021

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摘要为研究锈蚀对钢筋与混凝土黏结性能的影响,制作了24个200 mm×200 mm×200 mm的中心拉拔试件及6个标准立方体试块。通过电流诱导钢筋锈蚀并控制其锈蚀量,得到理论锈蚀率为0%、0.3%、0.5%、1%、2%、5%、8%、15%的拉拔试件并完成拉拔试验。通过割线刚度的方法研究了锈蚀率对黏结刚度的影响,分析了峰前拉力功随锈蚀率变化的规律。通过对已有研究中拔出试件的黏结强度退化数据进行统计,得到了三段式黏结强度退化试验模型及保守模型。提出了简化的三段式黏结-滑移本构模型并考虑了锈蚀率对残余黏结强度的影响。试验结果表明:钢筋与混凝土的黏结刚度达到峰值后,随着锈蚀率的增大,其退化速率可划分为2个阶段。峰前拉力功随锈蚀增大呈现先减小后增大再减小趋势。

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	王朝阳
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关键词: 钢筋混凝土锈蚀黏结强度黏结刚度本构模型

Abstract: To investigate the influence of corrosion of steel bar on the bonding performance between steel bar and concrete, 24 central pull-out test spe-cimens as well as other 6 specimens for compressive strength were cast. Pull-out test were conducted to study the bond behavior between concrete and steel bar which was corroded using current accelerate method to control corrosion with the expected corrosion rate of 0%,0.3%,0.5%,1%,2%,5%,8%,15%.The influence of corrosion rate on bond stiffness was studied by method of secant stiffness.The influence of corrosion on work of pull-out force before peak slip was also studied.A simplified three-stage test method and constitutive model of bond strength degeneration were proposed.Furthermore,a three-stage bond-slip constitutive relation was proposed considering influence of corrosion on residual bond strength. The test results show that degradation speed of bond stiffness between concrete and rebar can be divided into two stages after reaching peak.The work of pull-out force before peak slip decline at the beginning then increase and finally decrease with corrosion increasing.

Key words: reinforced concrete corrosion bond strength bond stiffness constitutive model

出版日期: 2019-11-25 发布日期: 2019-11-25

ZTFLH:

TU375.4

基金资助: 国家自然科学基金(51578229)

通讯作者: ouyanghnu@hnu.edu.cn

作者简介: 王朝阳,2018年6月毕业于湖南大学,获得工学硕士学位。于2018年7月在中国建筑西南设计研究院有限公司参加工作,主要从事结构设计、结构超限及节点分析等工作。
杨鸥,湖南大学副教授,硕士研究生导师。2010年10月毕业于哈尔滨工业大学,获工学博士学位,现主要研究锈蚀钢筋混凝土结构受力性能及钢筋混凝土构件疲劳损伤性能评估。

引用本文:

王朝阳, 周全, 杨鸥, 霍静思, 王海涛. 钢筋锈蚀率对钢筋与混凝土黏结性能的影响[J]. 材料导报, 2019, 33(Z2): 309-316.
WANG Zhaoyang, ZHOU Quan, YANG Ou, HUO Jingsi, WANG Haitao. Effect of Corrosion Rate of Steel Bar on Bond Performance Between Steel Barand Concrete. Materials Reports, 2019, 33(Z2): 309-316.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2019/V33/IZ2/309

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