Study on bond behaviour exposed to fire using beam specimen

4th International Conference on Civil and Environmental Engineering for Sustainability

地球科学;生态环境科学;经济学

Ahmad, Mohammad Suhaib^1 ; Bhargava, Pradeep^1 ; Sharma, Umesh Kumar^1

Department of Civil Engineering, Indian Institute of Technology Roorkee, India^1

关键词: Bond behaviours;    Bond properties;    Bond-slip relationship;    Composite action;    Effect of temperature;    Elevated temperature;    Properties of concretes;    Pull-out specimens;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/140/1/012149/pdf
DOI  :  10.1088/1755-1315/140/1/012149

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The composite action of concrete and steel in a reinforced concrete structure depends upon the bond between them. Bond behaviour is studied in terms of bond-slip relationship. The bond between them depends upon mechanical properties of concrete and steel. In an event of fire these mechanical properties degrades and hence the bond behaviour changes. Some researches were performed to study the effect of temperature on the bond-slip relationship which are based on pull out specimens. Generally these relationships are obtained using pull out specimen which over estimates the bond properties. In this study beam specimens were used which is recommended by Rilem. These specimens were exposed to elevated temperatures up to 650 °C and there bond-slip behaviour were studied. The study shows that bond strength decreases while peak slip increases with increases in temperature. Also an equation proposed was proposed which can predict the bond strength between concrete and steel exposed up to the temperature of 650 °C.