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- W3172083363 abstract "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 asatisfactory 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" @default.
- W3172083363 created "2021-06-22" @default.
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- W3172083363 date "2017-01-01" @default.
- W3172083363 modified "2023-09-24" @default.
- W3172083363 title "Numerical prediction of stress and displacement of ageing concrete dam due to alkali-aggregate and thermal chemical reaction" @default.
- W3172083363 doi "https://doi.org/10.12989/sem.2017.64.6.793" @default.
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