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논문 기본 정보

자료유형
학술저널
저자정보
Ignasi Fernandez (Chalmers University of Technology) Manuel F. Herrador (Universidade da Coruña) Antonio R. Marí (Polytechnic University of Catalonia) Jesús M. Bairán (Polytechnic University of Catalonia)
저널정보
한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.12 No.7
발행연도
2018.11
수록면
953 - 975 (23page)

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초록· 키워드

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The corrosion of steel reinforcement is commonly believed to be the primary cause of structural deterioration of reinforced concrete (RC) structures; as a result of this deterioration, a RC structure can incur a considerable reduction in structural serviceability and safety. Because of their inherent redundancy, statically indeterminate structures develop resistant mechanisms that can potentially assist in delaying the collapse of severely damaged RC structures. In order to experimentally demonstrate these resistant mechanisms, four groups of three two-span continuous RC beam members each were deteriorated using induced corrosion methods and tested to failure under monotonic loads. For control, one group of three RC beams was left uncorroded and similarly load tested. All the RC beam specimens subjected to corrosion demonstrated a significant reduction (a maximum reduction of 55% as compared to the uncorroded control group) of their ultimate capacity. The presence of corrosion induced a transition from flexural failure to anchorage failure in some specimens; despite the induced damage some redistributed structural capacity was observed. Modelling of deterioration effects by the inclusion of different aspects of corrosion was also conducted. Three-dimensional (3D) Finite-Element Method (FEM) models were developed to assess the variation in the mechanical properties of the corroded steel and the reduction in the bond interaction between concrete and steel due to the corrosion of the steel reinforcement. In general, the current 3D FEM models demonstrated a good agreement with the experimental data; however, 3D FEM models that exhibit greater sophistication are necessary to better describe the failure mode of some RC beam specimens when they are associated with local effects.
#statically indeterminate beams #reinforced concrete #corrosion #ultimate capacity #redistribution #bond #anchorage #3D FEM modeling

목차

Abstract
1 Introduction
2 Experimental Programme
3 Experimental Results
4 Modelling the Structural Behaviour of RC Members
5 Conclusions
References

참고문헌 (52)

참고문헌 신청
Apostolopoulos, C. A., Diamantogiannis, G., & Apostolopoulos, A. C. (2016). Assessment of the mechanical behavior in dual-phase steel B 400 C, B 450 C, and B 500 B in a marine environment. Journal of Materials in Civil Engineering, 28, 1?9. https://doi.org/10.1061/(ASCE)MT.1943-5533.0001271. Austin, S. A., Lyons, R., & Ing, M. J. (2004). Electrochemical behavior of steelreinforced concrete during accelerated corrosion testing. Corrosion, 60, 203?212. https://doi.org/10.5006/1.3287722. Bairan, J. M., Mari, A. R., Ortega, H., & Rosa, J. C. (2011). Effects of winding and straightening of medium and large diameter reinforcing bars manufactured in coils in their mechanical properties. Materiales de Construccion, 61, 559?581. https://doi.org/10.3989/mc.2011.60110. Ballim, Y., & Reid, J. C. C. (2003). Reinforcement corrosion and the deflection of RC beams?an experimental critique of current test methods. Cement and Concrete Composites, 25, 625?632. https://doi.org/10.1016/S0958-9465(02)00076-8. Bernat, A. M., Garcia, J. M. B., Ibars, E. O., & Perez, I. F. (2012). Numerical simulation of the structural effects of the deterioration in concrete structures. In: Proceedings of fib Symposium “Concrete Structures for Sustainable Community”.

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