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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.13 No.6
- 발행연도
- 2019.9
- 수록면
- 693 - 712 (20page)
이용수
초록· 키워드
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This paper presents a general procedure based on fracture mechanics models in order to analyze the level of cracking and structural safety in reinforced concrete elements at early ages, depending on the stripping time. Our procedure involves the development of a thermo-mechanical numerical model based on the finite element method that accounts for the change in the mechanical properties of concrete with time. Moreover, fracture mechanisms are analyzed by means of a material damage model, which is characterized via specific experimental results obtained for standard specimens and notched beams under three-point bending testing. The loading conditions are both thermal and mechanical, and are obtained from the hydration process for a given concrete dosage. The presented methodology allows for the determination of the optimal stripping time, whereas it helps assessing the analysis of the cracking and the stress states of the elements under consideration. A practical application, namely the analysis of a retaining wall, is used to validate our methodology, showing its suitability in engineering practice.
목차
Abstract
1. Introduction
2. Methodology
3. Material Characterization
4. Validation of the Thermo-mechanical Model
5. Applications
6. Conclusions
References
참고문헌 (46)
참고문헌 신청
Abdalla, H. M., & Karihaloo, B. L. (2003). Determination of size-independent specific fracture energy of concrete from three-point bend and wedge splitting tests. Magazine of Concrete Research, 55(2), 133?141.
Azenha, M., Faria, R., & Ferreira, D. (2009). Identification of early-age concrete temperatures and strains: Monitoring and numerical simulation. Cement & Concrete Composites, 31(6), 369?378. https ://doi.org/10.1016/j.cemco ncomp .2009.03.004.
Baltay, P., & Gjelsvik, A. (1990). Coefficient of friction for steel on concrete at high normal stress. Journal of Materials in Civil Engineering, 2(1), 46?49. https ://doi.org/10.1061/(ASCE)0899-1561(1990)2:1(46).
Bazant, Z. P. (1988). Mathematical modeling of creep and shrinkage of concrete. New York: Wiley.
Bergstrom, S. G., & Byfors, J. (1980). Properties of concrete at early ages. Materiaux et Construction, 13(3), 265?274. https ://doi.org/10.1007/BF024 73566 .
Azenha, M., Faria, R., & Ferreira, D. (2009). Identification of early-age concrete temperatures and strains: Monitoring and numerical simulation. Cement & Concrete Composites, 31(6), 369?378. https ://doi.org/10.1016/j.cemco ncomp .2009.03.004.
Baltay, P., & Gjelsvik, A. (1990). Coefficient of friction for steel on concrete at high normal stress. Journal of Materials in Civil Engineering, 2(1), 46?49. https ://doi.org/10.1061/(ASCE)0899-1561(1990)2:1(46).
Bazant, Z. P. (1988). Mathematical modeling of creep and shrinkage of concrete. New York: Wiley.
Bergstrom, S. G., & Byfors, J. (1980). Properties of concrete at early ages. Materiaux et Construction, 13(3), 265?274. https ://doi.org/10.1007/BF024 73566 .
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