Fire flame exposed behavior analysis of reinforced concrete columns eccentrically under axial loads using finite element method

Abstract EN

This investigation is conducted to study the behavior and load carrying capacity of reinforced concrete columns exposed to fire flame.

The exposure of reinforced concrete columns to fire causes changes in their structural behavior.

Finite element method was used to idealize the effect of burning by fire flame exposed to reinforced concrete columns.

The specimens that were subjected to fire flame at temperature levels of (400, 600 and 750 oC ) for 1.5 hour period of exposure at age of 60 days were determined.

A three-dimensional nonlinear finite element model was adopted to investigate the structural behavior of reinforced concrete column specimens with and without exposure to burning.

Good agreement was observed between the adopted finite element model results and experimental results.

The experimental to theoretical ultimate load ratio ranges from (1.01-1.07) before burning and (1.03-1.23) after burning for the analyzed column specimens.

The adopted finite element analysis showed, also, good agreement with experimental results throughout the load-deflection behavior before and after burning.