Abstract
Additional hysteretic experiments for corroded rectangular reinforced concrete (RC) columns with an axial load ratio of 0.27 were implemented. A quasi-static cyclic lateral loading with constant axial force was subjected to tests. Herein, a modified ductility factor model for corroded RC column is developed on the basis of the previous work and additional experiments. The model involves the influence of both the corrosion ratio of longitudinal rebar and the axial load ratio. A four-linear envelope curve model concerning lateral load and displacement is proposed in a combination of determination rules of the peak point and the failure strength point. The hysteretic model of corroded RC columns is developed by considering both degraded unloading stiffness and reloading stiffness on the history peak point. The hysteretic model can predict the residual life of corroded RC columns under seismic loading.
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Foundation item: the Programs for Changjiang Scholars and Innovative Research Team in University of the Ministry of Education of China (No. IRT1067), and the National Natural Science Foundation of China (No. 51868065)
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Yang, S., Song, X., Jia, H. et al. Hysteretic Model for Corroded Rectangular Reinforced Concrete Bridge Column Under Seismic Loading. J. Shanghai Jiaotong Univ. (Sci.) 26, 794–803 (2021). https://doi.org/10.1007/s12204-021-2282-8
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DOI: https://doi.org/10.1007/s12204-021-2282-8
Key words
- hysteretic model
- reinforced concrete (RC) column
- rebar
- corrosion
- seismic loading
- ductility factor
- envelope curve