Analysis of bond-slip performance between corroded steel bars and concrete at different positions of steel bars

被引：0
|
作者：
He, Hua'nan [1 ,2 ]
Chen, Xixian [1 ,2 ]
Yang, Manman [1 ,2 ]
机构：
[1] Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian
[2] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2023年 / 44卷 / 10期
关键词：
beam bond experiment; bond strength; concrete; constitutive relation; corrosion rate; numerical analysis; reinforcement corrosion; slip; steel bar position;
D O I：
10.11990/jheu.202110025
中图分类号：
学科分类号：
摘要：
To investigate the effects of different positions of the corroded steel bars on the bonding behaviors of reinforced concrete beams, four-point bending loading tests were conducted on 12 beam-type specimens. The results indicate that the position of the longitudinal reinforcement has great effects on the bonding performance between corroded steel bars and concrete. In comparison to specimens with corroded steel bars positioned in the middle of the concrete beam bottom, those with corroded steel bars at the bottom corner of the beam exhibited a reduction in bond strength by 17%, 20%, 46%, 26%, and 18% for theoretical corrosion rates of 0%, 1%, 2%, 4%, and 8%, respectively. Subsequently, leveraging the test results, we developed an average bond-slip constitutive model that considers the position of the steel bar. Then, based on ANSYS software, we performed numerical simulations employing this established bond-slip constitutive model. The results show that the bond-slip constitutive model considering the position of steel bars could effectively calculate the average ultimate bond stress. The numerical simulation values were in good agreement with the experimental values. Furthermore, the ultimate bond strength degradation model of reinforced concrete beams with varying corrosion rates was proposed. © 2023 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：1720 / 1731
页数：11
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