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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.64 No.6
- 발행연도
- 2017.1
- 수록면
- 793 - 802 (10page)
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초록· 키워드
오류제보하기
The damage of concrete due to the expansion of alkali-aggregate reaction (AAR) and thermal-chemical reactions affecting the strength of concrete is studied. The empirical equations for the variations of expansion of AAR, compressive strength and degradation of the modulus of elasticity with time, and compressive strength with degradation of the modulus of elasticity are proposed by analysing numerous experimental data. It is revealed that the expansion of AAR and compressive strength increase with time. The proposed combination of the time variations of chemical and mechanical parameters provides a satisfactory prediction of the concrete strength. Seismic analysis of the aged Koyna dam is conceded for two different long-term experimental data of concrete incorporating the proposed AAR based properties. The responses of aged Koyna dam reveal that the crest displacement of the Koyna dam significantly increases with time while the contour plots show that major principal stress at neck level reduces with time. As the modulus of elasticity decreases with ages the stress generated in the concrete structure get reduces. On the other hand with lesser value of modulus of elasticity the structure becomes more flexible and the crest displacement becomes very high that cause the seismic safety of the dam reduce.
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등록된 정보가 없습니다.
참고문헌 (11)
참고문헌 신청
Burman, A. / 2011 / Longterm influence of concrete degradation on dam-foundation interaction / Int. J. Comput. Meth 8(3):397~423
Capra, B. / 2003 / Orthotropic modelling of alkaliaggregate reaction in concrete structures : Numerical simulations / Mech. Mater 35(8):817~830
Gogoi, I. / 2007 / Influence of sediment layers on dynamic behavior of aged concrete dams / J. Eng. Mech., ASCE 133(4):400~413
Kuhl, D. / 2004 / Coupled chemomechanical deterioration of cementitious materials. Part I : Modeling / Int. J. Solid. Struct 41(1):15~40
Kuhl, D. / 2004 / Coupled chemomechanical deterioration of cementitious materials. Part II : Numerical methods and simulations / Int. J. Solid. Struct 41(1):41~67
Capra, B. / 2003 / Orthotropic modelling of alkaliaggregate reaction in concrete structures : Numerical simulations / Mech. Mater 35(8):817~830
Gogoi, I. / 2007 / Influence of sediment layers on dynamic behavior of aged concrete dams / J. Eng. Mech., ASCE 133(4):400~413
Kuhl, D. / 2004 / Coupled chemomechanical deterioration of cementitious materials. Part I : Modeling / Int. J. Solid. Struct 41(1):15~40
Kuhl, D. / 2004 / Coupled chemomechanical deterioration of cementitious materials. Part II : Numerical methods and simulations / Int. J. Solid. Struct 41(1):41~67
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