Comparison of Simple Calculation Methods for the Fire Design of Composite Columns and Beams

by Johannes Falke, DSTV, Koeln, Germany,



Document Type: Proceeding Paper

Part of: Composite Construction in Steel and Concrete II

Abstract: There is a need for approximate calculation methods to do the fire design of composite structures. Several of such methods for composite beams and columns have been compared to find out and to check their range of validity and their accuracy in order to give some hints for proper application to the practitioner and to influence further developments and the work on standards. As a result it can be stated that fairly good approximate methods exist for composite beams. For composite columns existing methods are not as satisfying as for beams. This is mostly due to the fact that for columns when subjected to high temperature conditions not only the reduction in strength but also in stiffness has to be considered. It seems that for the main types of columns different approximate methods are needed to achieve conservative but also economic results.

Subject Headings: Composite beams | Composite columns | Beam columns | Composite structures | Fire resistance | Load and resistance factor design

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