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Seismic Performance of Interior Reinforced Concrete Beam-Column Joint with Corroded Reinforcement
| 题名： | Seismic Performance of Interior Reinforced Concrete Beam-Column Joint with Corroded Reinforcement |
| 正文语种： | eng |
| 作者： | Zhang, Xinchen;Li, Bing |
| 作者单位： | Nanyang Technol Univ Sch Civil & Environm Engn Singapore 639798 Singapore;Nanyang Technol Univ Sch Civil & Environm Engn Singapore 639798 Singapore |
| 关键词： | RC beam-column joints;Corrosion;Axial force ratio;Seismic effect;Finite-element analysis;Strut-and-tie model (STM) |
| 摘要： | This study presented an experimental and analytical investigation on the seismic behavior of a reinforced concrete (RC) interior joint with corroded reinforcements. A total of eight RC interior joints with similar reinforcing detailing were tested and subjected to lateral cyclic loading. The variables studied in this research were the corrosion level of reinforcements in terms of mass loss and the column axial force ratio. The cyclic performance of all the joints including crack pattern, lateral loading capacity, energy dissipation, and lateral displacement decomposition were examined. The corroded joint constitutive model was calibrated and validated using the finite-element method. An analytical strut-and-tie model (STM) was developed for explaining the internal force flow and further parametric investigations. Results indicated that corrosion of reinforcements had a substantial effect on the strength and lateral drift capacity of the joints. In addition, based on the STM model, the axial force ratio exceeding 0.3 and longitudinal reinforcement corrosion level around 6-10% were detrimental toward joint behavior and can contribute to joint shear failure. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 2 |
| 页码： | 04021275.1-04021275.13 |
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