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Crack Resistance Criteria of Massive Concrete and Reinforced Concrete Structures During the Construction Period
In general practice, the calculation of thermal fields is often based on the heat equation solution as well as thermal stresses definition, linked with calculation of crack resistance of massive concrete during the construction period. A change in the thermal state of such structures occurs due to the heat liberation from cement hydration during the concrete hardening process, as well as outside temperature fluctuations, solar exposure, various technological factors, etc. Emerging thermal stresses may damage the structural integrity. In the article, the calculations were implemented for the thermal crack resistance of the foundation slab full-height casted as a single block during a building period. Estimation of cracking resistance was made according to five different criteria with taking into account concrete creep and influence of hardening temperature on concrete characteristics. The necessary thickness of thermal insulation was selected. Authors revealed that the strictest criterion is energy criterion of L. P. Trapeznikov, the simplest and not requiring difficult calculations is criterion of limited temperature differences.
Crack Resistance Criteria of Massive Concrete and Reinforced Concrete Structures During the Construction Period
In general practice, the calculation of thermal fields is often based on the heat equation solution as well as thermal stresses definition, linked with calculation of crack resistance of massive concrete during the construction period. A change in the thermal state of such structures occurs due to the heat liberation from cement hydration during the concrete hardening process, as well as outside temperature fluctuations, solar exposure, various technological factors, etc. Emerging thermal stresses may damage the structural integrity. In the article, the calculations were implemented for the thermal crack resistance of the foundation slab full-height casted as a single block during a building period. Estimation of cracking resistance was made according to five different criteria with taking into account concrete creep and influence of hardening temperature on concrete characteristics. The necessary thickness of thermal insulation was selected. Authors revealed that the strictest criterion is energy criterion of L. P. Trapeznikov, the simplest and not requiring difficult calculations is criterion of limited temperature differences.
Crack Resistance Criteria of Massive Concrete and Reinforced Concrete Structures During the Construction Period
Lecture Notes in Civil Engineering
Anatolijs, Borodinecs (editor) / Nikolai, Vatin (editor) / Vitalii, Sergeev (editor) / Ivanov, Ernest (author) / Semenov, Kirill (author) / Manovitskij, Sergej (author) / Barabanshchikov, Yurij (author) / Vavilova, Anastasia (author) / Mushchanov, Volodymyr (author)
International Scientific Conference on Energy, Environmental and Construction Engineering ; 2019 ; St. Petersburg, Russia
2020-04-30
10 pages
Article/Chapter (Book)
Electronic Resource
English
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