Residual Mechanical Properties of Post Fire Steel Rebars

Abstract

Abstract Reinforcement steel is a crucial material for buildings utilized extensively in composite construction due to its benefits, including strength, durability and simplicity of availability. One of the major risks that seriously harms a structure and eventually causes it to collapse is fire. The reinforcing steel significantly loses both its intrinsic mechanical qualities and service life as a result of the intensity of fire exposure. The present research work is being conducted to investigate the residual strength of yield, tensile strength and elongation percentage of 16mmᴓ post fire steel reinforcement bars. The sample specimens were collected from failed post fire RC columns from previous experimental work which were exposed to 300,500 and 800oC temperature for 2.0 hour fire duration having 20, 30 and 40mm concrete covers. The impact of temperature and cover of concrete on mechanical characteristics of post fire steel reinforcement is also discussed.