Eccentric compression behavior of TRC-strengthened concrete columns under chloride environment
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 29 November 2018
Issue publication date: 22 February 2019
Abstract
Purpose
The purpose of this paper is to investigate the mechanical behavior of textile-reinforced concrete (TRC)-strengthened concrete columns with small eccentricity under chloride-wet-dry cycles.
Design/methodology/approach
A total of ten reinforced concrete (RC) columns were constructed and subjected to eccentric compression, and the effects of the slenderness ratio, a variable number of wet-dry cycles and the coupled effect of loading and a chloride environment were analyzed. One of the columns tested was unreinforced, whereas the remaining columns were strengthened laterally with TRC.
Findings
The results showed that a reduction in the slenderness ratio was conducive to the improvement of the bearing capacity of the reinforced column; however, the reinforcement effect of TRC tended to decrease with an increasing number of wet-dry cycles, and the coupled effect of loading and a chloride environment significantly degraded the compression performance of TRC-strengthened columns, with the damage becoming more serious with increase in the sustained load ratio.
Research limitations/implications
In the next test, the duration of chloride-wet-dry cycles will be extended. In the same time, to obtain a clearer trend, the authors will also increase the number of specimens to obtain more data for drawing general conclusions.
Originality/value
The originality is to explore the feasibility of using cement-based materials (TRC) as a confinement technique in chloride environment. The investigations demonstrate that TRC has a good reinforcement effect on the concrete columns under chloride-wet-dry cycles. Finally, influence of each parameter is analyzed, which can be used as reference and foundation in actual application.
Keywords
Acknowledgements
The authors gratefully acknowledge the Fundamental Research Funds for the Central Universities (2017XKZD09). The experimental work described in this paper was conducted at the Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Civil Engineering in the China University of Mining and Technology. The assistance provided by the staff and students at the Laboratory during the tests is greatly appreciated.
Compliance with Ethical Standards: Conflict of interest: The authors declare that they have no conflict of interest.
Citation
Hu, X.-Q., Yin, S. and Lv, H.-L. (2019), "Eccentric compression behavior of TRC-strengthened concrete columns under chloride environment", Anti-Corrosion Methods and Materials, Vol. 66 No. 2, pp. 159-167. https://doi.org/10.1108/ACMM-06-2018-1949
Publisher
:Emerald Publishing Limited
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