Calculation method of equivalent plastic hinge length of corroded reinforced concrete columns

被引：0
作者：
Zheng Y. [1 ,2 ]
Zheng S. [1 ,2 ]
Dong L. [1 ,2 ]
Zhang Y. [1 ,2 ]
Yang S. [1 ,2 ]
机构：
[1] Collage of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an
[2] Key Laboratory of Structural Engineering and Earthquake Resistance, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Bar-slip effect; Bending effect; Corrosion; Equivalent plastic hinge length; Reinforced concrete columns;
D O I：
10.11817/j.issn.1672-7207.2021.12.022
中图分类号：
学科分类号：
摘要：
In order to evaluate the deformation capacity and bearing capacity of corroded reinforced concrete(RC) columns, a calculation method for the equivalent plastic hinge length of corroded RC columns considering bending effect and sliding effect of longitudinal bars was proposed. Firstly, the corrosion pattern and failure phenomena of the corroded RC columns were analyzed to define the constitutive relationship of concrete. Considering the influence of steel corrosion on the bond strength and bond stress distribution, the corrosion bond-slip model was established. Secondly, the calculation method of plastic rotation angle corresponding to bending deformation component and longitudinal bars slip component was obtained by combining the P-M-φ analysis. The formula for calculating the equivalent plastic hinge length of corroded RC columns was obtained by adopting the principle of curvature integral. Finally, the calculated value of equivalent plastic hinge length and load-displacement calculation curve with the test results were compared. The results show that the relative error between the calculated Lp value and the test value is small. The load-displacement calculation curve agrees well with the test results, indicating the calculation method of equivalent plastic hinge length has high accuracy and can be used to evaluate the bearing capacity and deformation performance of corroded RC columns. © 2021, Central South University Press. All right reserved.
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页码：4424 / 4433
页数：9
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