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    Elevated Temperature Testing of Thermomechanically Treated Steel Bars

    Source: Journal of Materials in Civil Engineering:;2020:;Volume ( 032 ):;issue: 006
    Author:
    Muhammad Masood Rafi
    ,
    Abdul Basit Dahar
    ,
    Tariq Aziz
    ,
    Sarosh Hashmat Lodi
    DOI: 10.1061/(ASCE)MT.1943-5533.0003202
    Publisher: ASCE
    Abstract: The details of experimental testing of thermomechanically treated reinforcing bars at elevated temperatures are presented in this paper. Rebars of 10-, 12-, 16-, 20-, and 25-mm diameter were used in the testing program. An electrical furnace was used to heat the bars to 100°C–900°C in increments of 100°C. The chemical composition of the rebars complied with bar manufacturing standards. The effect of bar diameter on the mechanical properties was random at ambient temperature, which also followed for the testing at elevated temperatures. These differences were due to the differences in the bar chemical composition. The yield plateau of the 25-mm-diameter bar disappeared on heating at 100°C, whereas this phenomenon occurred at 300°C for the rest of the bars. The rebar ultimate strength up to 300°C was higher compared with the strength at ambient temperature owing to blue-brittleness effects. The reduction coefficients for the proportional and yield strengths and the elastic moduli for all bars were similar at all heating temperatures. Brittle behavior of the bars tested at high temperatures was observed relative to the ambient temperature up to 500°C, which changed to ductile behavior thereafter. The suggested models to predict stress–strain curves for the strain-hardening region provided a reasonable match with the average observed curves for the bars tested at both ambient and elevated temperatures.
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      Elevated Temperature Testing of Thermomechanically Treated Steel Bars

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4266323
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    contributor authorMuhammad Masood Rafi
    contributor authorAbdul Basit Dahar
    contributor authorTariq Aziz
    contributor authorSarosh Hashmat Lodi
    date accessioned2022-01-30T19:59:20Z
    date available2022-01-30T19:59:20Z
    date issued2020
    identifier other%28ASCE%29MT.1943-5533.0003202.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4266323
    description abstractThe details of experimental testing of thermomechanically treated reinforcing bars at elevated temperatures are presented in this paper. Rebars of 10-, 12-, 16-, 20-, and 25-mm diameter were used in the testing program. An electrical furnace was used to heat the bars to 100°C–900°C in increments of 100°C. The chemical composition of the rebars complied with bar manufacturing standards. The effect of bar diameter on the mechanical properties was random at ambient temperature, which also followed for the testing at elevated temperatures. These differences were due to the differences in the bar chemical composition. The yield plateau of the 25-mm-diameter bar disappeared on heating at 100°C, whereas this phenomenon occurred at 300°C for the rest of the bars. The rebar ultimate strength up to 300°C was higher compared with the strength at ambient temperature owing to blue-brittleness effects. The reduction coefficients for the proportional and yield strengths and the elastic moduli for all bars were similar at all heating temperatures. Brittle behavior of the bars tested at high temperatures was observed relative to the ambient temperature up to 500°C, which changed to ductile behavior thereafter. The suggested models to predict stress–strain curves for the strain-hardening region provided a reasonable match with the average observed curves for the bars tested at both ambient and elevated temperatures.
    publisherASCE
    titleElevated Temperature Testing of Thermomechanically Treated Steel Bars
    typeJournal Paper
    journal volume32
    journal issue6
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0003202
    page04020145
    treeJournal of Materials in Civil Engineering:;2020:;Volume ( 032 ):;issue: 006
    contenttypeFulltext
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