Premium
Buckling of steel columns in fire: non‐linear behaviour and design proposal
Author(s) -
Somaini Diego,
Knobloch Markus,
Fontana Mario
Publication year - 2012
Publication title -
steel construction
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.443
H-Index - 8
eISSN - 1867-0539
pISSN - 1867-0520
DOI - 10.1002/stco.201210022
Subject(s) - buckling , structural engineering , materials science , stress (linguistics) , critical load , flexural strength , engineering , philosophy , linguistics
In a fire the buckling strength of steel columns is heavily influenced by the distinctly non‐linear material behaviour of steel at elevated temperatures. A general analytical model that explicitly includes the non‐linear material behaviour is presented here and verified with full‐scale tests at elevated temperature. Based on test results and this general model, a new model for flexural buckling is developed which can be used to design slender columns and allows non‐linear stress–strain relationships, geometrical imperfections and load eccentricities to be considered. In addition, the model can be easily extended to include local cross‐section instabilities describing the interaction between local and global buckling phenomena.