Study on the residual performance of RC beams exposed to processed temperatures and fire

Sachin Vijaya Kumar; N. Suresh

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Study on the residual performance of RC beams exposed to processed temperatures and fire

机译：Study on the residual performance of RC beams exposed to processed temperatures and fire

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Purpose The Reinforced Concrete(RC) elements are known to perform well during exposure to elevated temperatures. Hence, RC elements are widely used to resist the extreme heat developing from accidental fires and other industrial processes. In both of the scenarios, the RC element is exposed to elevated temperatures. However, the primary differences between the fire and processed temperatures are the rate of temperature increase, mode of exposure and exposure durations. In order to determine the effect of two heating modalities, RC beams were exposed to processed temperatures with slow heating rates and fire with fast heating rates. Design/methodology/approach In the present study, RC beam specimens were exposed to 200 °C, to 800 °C temperature at 200 ℃ intervals for 2 h' duration by adopting two heating modes; Fire and processed temperatures. An electrical furnace with low-temperature increment and a fire furnace with standard time-temperature increment is adapted to expose the RC elements to elevated temperatures. Findings - It is observed from test results that, the reduction in load-carrying capacity, first crack load, and thermal crack widths of RC beams exposed to 200 °C, and 600 °C temperature at fire is significantly high from the RC beams exposed to the processed temperature having the same maximum temperature. As the exposure temperature increases to 800 °C, the performance of RC beams at all heating modes becomes approximately equal. Originality/value In this work, residual performance, and failure modes of RC beams exposed to elevated temperatures were achieved through two different heating modes are presented.

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来源
《Journal of structural fire engineering》 |2022年第3期|269-292|共24页
作者
Sachin Vijaya Kumar; N. Suresh;
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作者单位

Department of Civil Engineering, The National Institute of Engineering, Mysore, India;

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原文格式 PDF
正文语种英语
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关键词
RC beams; Standard fire; Flexural strength test; Processed temperatures; Residual test; Sustained elevated temperature;

Study on the residual performance of RC beams exposed to processed temperatures and fire

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