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Numerical Analysis of Bottle-Shaped Isolated Struts Concrete Deteriorated by Delayed Ettringite Formation
https://orcid.org/http://orcid.org/0000-0002-1026-4523
The paper discusses the structural behaviour of concrete struts deteriorated by internal swelling reactions due to delayed ettringite formation (DEF). To assess this behaviour, nonlinear finite elements analyses were performed using concrete damaged plasticity (CDP) model of ABAQUS, which was calibrated and validated. The effects of the internal swelling reactions were simulated numerically using a strategy of decreasing mechanical properties of concrete. MATLAB scripts were developed to automate the process of determining the CDP model parameters, especially those related to the damage in tension and compression with few input data. Decreases in the first crack and failure loads of 78% and 56% were observed which means that DEF expansions are an important issue in the load capacity of concrete structures. Besides, it was also observed a significant increase in cracks openings width, even for low expansion level, with values of 3.65 mm, and for high level of expansion with values of 4.51 mm. This is a relevant aspect for the durability of concrete structures that is severely affected by DEF expansions.
Numerical Analysis of Bottle-Shaped Isolated Struts Concrete Deteriorated by Delayed Ettringite Formation
https://orcid.org/http://orcid.org/0000-0002-1026-4523
The paper discusses the structural behaviour of concrete struts deteriorated by internal swelling reactions due to delayed ettringite formation (DEF). To assess this behaviour, nonlinear finite elements analyses were performed using concrete damaged plasticity (CDP) model of ABAQUS, which was calibrated and validated. The effects of the internal swelling reactions were simulated numerically using a strategy of decreasing mechanical properties of concrete. MATLAB scripts were developed to automate the process of determining the CDP model parameters, especially those related to the damage in tension and compression with few input data. Decreases in the first crack and failure loads of 78% and 56% were observed which means that DEF expansions are an important issue in the load capacity of concrete structures. Besides, it was also observed a significant increase in cracks openings width, even for low expansion level, with values of 3.65 mm, and for high level of expansion with values of 4.51 mm. This is a relevant aspect for the durability of concrete structures that is severely affected by DEF expansions.
Numerical Analysis of Bottle-Shaped Isolated Struts Concrete Deteriorated by Delayed Ettringite Formation
https://orcid.org/http://orcid.org/0000-0002-1026-4523
The paper discusses the structural behaviour of concrete struts deteriorated by internal swelling reactions due to delayed ettringite formation (DEF). To assess this behaviour, nonlinear finite elements analyses were performed using concrete damaged plasticity (CDP) model of ABAQUS, which was calibrated and validated. The effects of the internal swelling reactions were simulated numerically using a strategy of decreasing mechanical properties of concrete. MATLAB scripts were developed to automate the process of determining the CDP model parameters, especially those related to the damage in tension and compression with few input data. Decreases in the first crack and failure loads of 78% and 56% were observed which means that DEF expansions are an important issue in the load capacity of concrete structures. Besides, it was also observed a significant increase in cracks openings width, even for low expansion level, with values of 3.65 mm, and for high level of expansion with values of 4.51 mm. This is a relevant aspect for the durability of concrete structures that is severely affected by DEF expansions.
Numerical Analysis of Bottle-Shaped Isolated Struts Concrete Deteriorated by Delayed Ettringite Formation
Iran J Sci Technol Trans Civ Eng
Silva, F. A. N. (author) / Delgado, J. M. P. Q. (author) / Azevedo, A. C. (author) / Lira, I. S. (author)
2022-02-01
16 pages
Article (Journal)
Electronic Resource
English
Bottle-Shaped Isolated Struts Concrete Deteriorated
| Springer Verlag | 2022
Delayed Ettringite Formation in Concrete
| British Library Conference Proceedings | 1999