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A platform for research: civil engineering, architecture and urbanism
Crack Control of Upstream Polder Face Using Calibrated Thermo-mechanical Simulations
https://orcid.org/http://orcid.org/0000-0002-0465-7443
https://orcid.org/http://orcid.org/0000-0002-7128-3664
https://orcid.org/http://orcid.org/0000-0002-3918-3647
Concrete crack mitigation in hydro-engineering projects belongs to important tasks during design and operational stages. The paper focuses on a design of reinforced upstream concrete face of a polder. The face is made of cast concrete blocks, 15 m long, 2.5 m tall and up to 2.5 m thick. First, the paper summarizes design of two concretes with low hydration heat and their strength evolution, basic creep, calorimetry data, and freeze-thaw resistance. Heat release was further validated on a small insulated concrete cube. Second, a thermo-mechanical model has been assembled, taking into account heat of hydration, ageing basic creep, autogenous shrinkage, evolution of tensile strength. A multi-directional fixed crack model captures crack initiation, crack opening is controlled by exponential softening and dissipation of correct amount of energy is guaranteed by crack-band approach. Summer casting scenario is presented, showing crack evolution due to different reinforcement ratios and concrete mix design. The results show that minimizing cement amount in concrete is a must and crack width can remain under required 0.20 mm with the reinforcement ratio of 0.4–0.6%, depending on mix design.
Crack Control of Upstream Polder Face Using Calibrated Thermo-mechanical Simulations
https://orcid.org/http://orcid.org/0000-0002-0465-7443
https://orcid.org/http://orcid.org/0000-0002-7128-3664
https://orcid.org/http://orcid.org/0000-0002-3918-3647
Concrete crack mitigation in hydro-engineering projects belongs to important tasks during design and operational stages. The paper focuses on a design of reinforced upstream concrete face of a polder. The face is made of cast concrete blocks, 15 m long, 2.5 m tall and up to 2.5 m thick. First, the paper summarizes design of two concretes with low hydration heat and their strength evolution, basic creep, calorimetry data, and freeze-thaw resistance. Heat release was further validated on a small insulated concrete cube. Second, a thermo-mechanical model has been assembled, taking into account heat of hydration, ageing basic creep, autogenous shrinkage, evolution of tensile strength. A multi-directional fixed crack model captures crack initiation, crack opening is controlled by exponential softening and dissipation of correct amount of energy is guaranteed by crack-band approach. Summer casting scenario is presented, showing crack evolution due to different reinforcement ratios and concrete mix design. The results show that minimizing cement amount in concrete is a must and crack width can remain under required 0.20 mm with the reinforcement ratio of 0.4–0.6%, depending on mix design.
Crack Control of Upstream Polder Face Using Calibrated Thermo-mechanical Simulations
https://orcid.org/http://orcid.org/0000-0002-0465-7443
https://orcid.org/http://orcid.org/0000-0002-7128-3664
https://orcid.org/http://orcid.org/0000-0002-3918-3647
Concrete crack mitigation in hydro-engineering projects belongs to important tasks during design and operational stages. The paper focuses on a design of reinforced upstream concrete face of a polder. The face is made of cast concrete blocks, 15 m long, 2.5 m tall and up to 2.5 m thick. First, the paper summarizes design of two concretes with low hydration heat and their strength evolution, basic creep, calorimetry data, and freeze-thaw resistance. Heat release was further validated on a small insulated concrete cube. Second, a thermo-mechanical model has been assembled, taking into account heat of hydration, ageing basic creep, autogenous shrinkage, evolution of tensile strength. A multi-directional fixed crack model captures crack initiation, crack opening is controlled by exponential softening and dissipation of correct amount of energy is guaranteed by crack-band approach. Summer casting scenario is presented, showing crack evolution due to different reinforcement ratios and concrete mix design. The results show that minimizing cement amount in concrete is a must and crack width can remain under required 0.20 mm with the reinforcement ratio of 0.4–0.6%, depending on mix design.
Crack Control of Upstream Polder Face Using Calibrated Thermo-mechanical Simulations
RILEM Bookseries
Kanavaris, Fragkoulis (editor) / Benboudjema, Farid (editor) / Azenha, Miguel (editor) / Šmilauer, Vít (author) / Havlásek, Petr (author) / Reiterman, Pavel (author) / Huňka, Petr (author)
International RILEM Conference on Early-age and Long-term Cracking in RC Structures ; 2021 ; Paris, France
International RILEM Conference on Early-Age and Long-Term Cracking in RC Structures ; Chapter: 16 ; 189-200
RILEM Bookseries ; 31
2021-05-19
12 pages
Article/Chapter (Book)
Electronic Resource
English
Online Contents | 2000
Online Contents | 1996
British Library Online Contents | 2000