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논문 기본 정보

자료유형
학술저널
저자정보
Mahdi Ben Ftima (École Polytechnique de Montréal) Emre Yildiz (IDAE)
저널정보
한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.17 No.5
발행연도
2023.9
수록면
781 - 797 (17page)

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초록· 키워드

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This work focuses on the failure mechanisms of concrete hydroelectric facilities affected by alkali–aggregate reaction (AAR). Identification of potential failure mechanisms is based on an original “top-down approach” using an AAR pushover analysis with multi-physics numerical simulation of a representative hydroelectric facility. Different global rehabilitation scenarios based on slot-cutting and grouting techniques are discussed and compared, using different performance metrics. A new quantitative performance metric, specifically developed for the nonlinear sophisticated analysis tool and considering the volumetric cracking caused by AAR is also suggested. Based on comparison results, a combination of grouting after a partial slot-cutting in the neighborhood of the discontinuities, appears to provide the best compromise in terms of stress relief and extent of cracking. New AAR benchmark problems, issued from the top-down approach, are also suggested for the first time in the literature.

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Abstract
1 Introduction
2 Approach and Computational Framework
3 Assessment of Potential Failure Mechanisms(PFMs)
4 Rehabilitation Strategies and Performance Criteria
5 Results and Discussion
6 Discussion
7 Suggested V&V Benchmarks
8 Conclusions
References

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