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Behavior of thermo-mechanically treated rebar exposed to elevated temperatures
https://orcid.org/0000-0002-1709-3413
https://orcid.org/0000-0002-7196-4363
https://orcid.org/0000-0001-6544-8904
https://orcid.org/0000-0002-4403-3205
The purpose of the paper is to mathematically model and predict the characteristics of thermo-mechanically treated (TMT) rebar when subjected to elevated temperatures.
Data were collected from a few selected studies for developing the constitutive relations. Using the exposed temperature and the duration of heating as independent variables, the empirical relations were developed for determining the changes in mechanical properties of TMT rebars at elevated temperatures.
Recrystallization of TMT rebar crystals took place around 500 °C, which led to a decrease in the dislocation density along with the increase of large-sized grains, resulting in the degradation of strength. Up to a temperature range of 500 °C, the normalized fracture strength was higher, while the normalized fracture strain is not so high. This indicated a failure of brittle nature.
This is an original work done by others as a study to theoretically predict the mechanical behavior of TMT rebars when exposed to elevated temperature.
The TMT bars showed brittleness characteristics up to 500 °C and showed ductility characteristics after that on account of its recrystallization and extensive tempering of the outer martensitic rim around that temperature.
The comparison between the super ductile (SD) TMT and the regular TMT exhibit shows that the SD-TMT bars were about 1.5 times more ductile than the normal ones.
Behavior of thermo-mechanically treated rebar exposed to elevated temperatures
https://orcid.org/0000-0002-1709-3413
https://orcid.org/0000-0002-7196-4363
https://orcid.org/0000-0001-6544-8904
https://orcid.org/0000-0002-4403-3205
The purpose of the paper is to mathematically model and predict the characteristics of thermo-mechanically treated (TMT) rebar when subjected to elevated temperatures.
Data were collected from a few selected studies for developing the constitutive relations. Using the exposed temperature and the duration of heating as independent variables, the empirical relations were developed for determining the changes in mechanical properties of TMT rebars at elevated temperatures.
Recrystallization of TMT rebar crystals took place around 500 °C, which led to a decrease in the dislocation density along with the increase of large-sized grains, resulting in the degradation of strength. Up to a temperature range of 500 °C, the normalized fracture strength was higher, while the normalized fracture strain is not so high. This indicated a failure of brittle nature.
This is an original work done by others as a study to theoretically predict the mechanical behavior of TMT rebars when exposed to elevated temperature.
The TMT bars showed brittleness characteristics up to 500 °C and showed ductility characteristics after that on account of its recrystallization and extensive tempering of the outer martensitic rim around that temperature.
The comparison between the super ductile (SD) TMT and the regular TMT exhibit shows that the SD-TMT bars were about 1.5 times more ductile than the normal ones.
Behavior of thermo-mechanically treated rebar exposed to elevated temperatures
https://orcid.org/0000-0002-1709-3413
https://orcid.org/0000-0002-7196-4363
https://orcid.org/0000-0001-6544-8904
https://orcid.org/0000-0002-4403-3205
The purpose of the paper is to mathematically model and predict the characteristics of thermo-mechanically treated (TMT) rebar when subjected to elevated temperatures.
Data were collected from a few selected studies for developing the constitutive relations. Using the exposed temperature and the duration of heating as independent variables, the empirical relations were developed for determining the changes in mechanical properties of TMT rebars at elevated temperatures.
Recrystallization of TMT rebar crystals took place around 500 °C, which led to a decrease in the dislocation density along with the increase of large-sized grains, resulting in the degradation of strength. Up to a temperature range of 500 °C, the normalized fracture strength was higher, while the normalized fracture strain is not so high. This indicated a failure of brittle nature.
This is an original work done by others as a study to theoretically predict the mechanical behavior of TMT rebars when exposed to elevated temperature.
The TMT bars showed brittleness characteristics up to 500 °C and showed ductility characteristics after that on account of its recrystallization and extensive tempering of the outer martensitic rim around that temperature.
The comparison between the super ductile (SD) TMT and the regular TMT exhibit shows that the SD-TMT bars were about 1.5 times more ductile than the normal ones.
Behavior of thermo-mechanically treated rebar exposed to elevated temperatures
TMT rebars in elevated temperature
Choubey, Bishwajeet (author) / Kumar, Virendra (author) / Dutta, Sekhar Chandra (author) / Saikia, Saurav Kumar (author)
Journal of Structural Fire Engineering ; 13 ; 470-490
2022-01-06
21 pages
Article (Journal)
Electronic Resource
English
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