Structural response of RC columns exposed to high temperatures
- Vol.96(10), Oct
- Mumbai ACC LTD 2022
- 26-36p.
Concrete usually performs well in building fires. Concrete members undergo significant distress and retain no useful structural strength at high temperatures. In most of the structures, columns make up a common structural element. This paper presents the study of reinforced concrete (RC) columns subjected to high temperatures. A set of 1+16 RC columns made up of ordinary Portland cement (OPC) concrete mix and another set of 16 RC columns made with high volume fly ash (HVFA) concrete mix. 32 columns meant for temperature exposure from 100 to 800°C at an interval of 100°C for1 hour duration. One column used as companion column at room temperature. After heating, specimens were cooled to room temperature by two cooling methods one by air-cooling method and the other by water quenching method. The specimens have been tested to measure the ultimate load capacity of the columns and load-deformation behavior of the columns, and the results were analysed and presented in this paper. The OPC concrete columns performed better residual strengths and stiffness over HVFA concrete columns, when the specimens cooled by air-cooling method. Whereas, the HVFA concret columns shown slightly better performance over OPC concrete columns when they cooled by water quenching method.