Size Effect on Fire Resistance of Reinforced Concrete Columns and Beams

Published in: Innovation and Development for the Americas: Engineering, Education, Research and Development: Proceedings of the 8th Latin American and Caribbean Conference for Engineering and Technology
Date of Conference: June 1-4, 2010
Location of Conference: Arequipa, Peru
Authors: Liu Lixian
D.V. Reddy
Khaled Sobhan
Refereed Paper: #93

Abstract

It is important to consider the effect of cross-section size and concrete cover thickness on fire resistance on concrete columns and beams, because at same load level, the fire endurance generally increases with an increase of member cross-section size and concrete cover thickness. A lot of research has been conducted in size effect on concrete members at room temperature. However, the study of size effect on fire resistance of RC is rare. A new concept, namely, equivalent fire duration was developed in this paper. Based on numerical analysis and test data available in the literature, this paper presents the effects of (1) the cross-section size on fire resistance on RC columns and beams, and (2) the thickness of concrete cover on fire endurance of RC beams