In order to investigate the fire resistance of flexural members

the standard design methods in China

America

Europe

Britain and Australia are introduced for systematically understanding the existing fire resistance design methods in different countries.Their difference and relationship are compared and discussed.An example was designed and the critical temperature and fire duration of the flexural member were computed using different methods.It is suggest that the results obtained by different methods have great differences even in the same conditions.The critical temperature obtained by Australia standard method is lower than that obtained by others.The fire duration obtained by British standard method is the highest for unprotected steel members

and that obtained by American standard method is the lowest for protected steel members.