Currently

the determination of the fire resistance of concrete columns is essentially based on table containing the dimensions of the cross section and values of the concrete cover or finite element analysis method

which unsatisfies the engineers for a quick and efficient design.A simplified method for calculating the ultimate load bearing capacity of four-face heated reinforced concrete columns is presented in this paper

which referenced foreign latest information.With this method

we need neither to analysis the temperature filed of the section advanced nor to query any table

and just consider the influence parameter in the design formulas directly.The accuracy of the method is verified through a set of experimental test results comprising 39 columns.The method yields reasonably accurate predictions for the fire resistance of RC columns.In addition

the paper includes an example to illustrate the use of the formula.This method can be used by engineers for its simplicity

practicality and yet associated with the current code.