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Structural Engineering and Mechanics Volume 79, Number 5, September10 2021 , pages 565-578 DOI: https://doi.org/10.12989/sem.2021.79.5.565 |
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Theoretical and practical models for shear strength of corroded reinforced concrete columns |
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Bo Yu, Zihao Ding, Shengbin Liu and Bing Li
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| Abstract | ||
| In order to predict the shear strength of corroded reinforced concrete column (CRCC) accurately and efficiently, both theoretical and practical models for shear strength of the CRCC were established through theoretical derivation and experimental validation. The deterioration mechanism for shear strength of the CRCC due to the steel reinforcement corrosion was explored first based on the shear mechanism analysis of the truss-arch model. Then a theoretical model for shear strength of the CRCC was developed by taking into account the influences of steel reinforcement corrosion on the effective yield strength of transverse reinforcement, the effective cross-sectional area of both corroded transverse and longitudinal reinforcements as well as the effective concrete shear area. Meanwhile, three practical models to evaluate the shear strength of the CRCC were proposed based on 54 sets of experimental data by determining the approximate values of three important parameters, including the contribution coefficient of shear strength for concrete, the ratio of shear stiffness between the truss model and the arch model, as well as the tangent value of the critical crack angle. Finally, the accuracy and applicability of both theoretical and practical models for shear strength of the CRCC were validated by comparing with five existing empirical shear strength models. | ||
| Key Words | ||
| corrosion; practical model; reinforced concrete column; shear strength; theoretical model; truss-arch model | ||
| Address | ||
| Bo Yu: School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; Key Laboratory of Engineering Disaster Prevention and Structural Safety of China Ministry of Education, China; Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Nanning 530004, China Zihao Ding: School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China Shengbin Liu: School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; Nanjing Municipal Design and Research Institute Co., Ltd, Nanjing 210008, China Bing Li: School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore | ||