Influence of steel corrosion on axial and eccentric compression behavior of coral aggregate concrete column

Abstract

To study the behavior of coral aggregate concrete (CAC) column under axial and eccentric compression, the compression behavior of CAC column with different types of steel and initial eccentricity (e_i) were tested, and the deformation behavior and ultimate bearing capacity (N_u) were studied. The results showed that as the e_i increases, the N_u of CAC column decreases nonlinearly. Besides, the steel corrosion in CAC column is severe, which reduces the steel section and steel strength, and decreases the N_u of CAC column. The durability of CAC structures can be improved by using new organic coated steel. Considering the influence of steel corrosion and interfacial bond deterioration, the calculation models of N_u under axial and eccentric compression were presented.

Graphical abstract

Keywords

coral aggregate concrete column / axial compression / eccentric compression / steel corrosion / calculation model

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Acknowledgements

The authors gratefully acknowledge the Project of Young Science and Technology Talents of Jiangsu Province (No. 027), the Open Funds by State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology) (No. SYSJJ2020-19), the Fundamental Research Funds for the Central Universities (No. B210202023), the Water Conservancy Science and Technology Project of Jiangsu Province (No. 2020017), the Open Funds by Key Laboratory of Coastal Disaster and Defense (Hohai University), Ministry of Education (No. 202006), the Systematic Project of Guangxi Key Laboratory of Disaster Prevention and Structural Safety (No. 2019ZDK006), the Postdoctoral Research Funds of Jiangsu Province (No. 2021K133B), the Ningbo Science and Technology Innovation Project (No. 2020Z040).

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2021 Higher Education Press 2021.