doi:10.3850/978-981-08-9247-0_rp064-icsas11

ABSTRACT

At both room temperature and elevated temperatures, the cross-sectional load-carrying capacity of structural steel members is limited by the effects of local buckling. Strength and stiffness of steel also reduce with increasing temperature and the stress-strain relationship becomes increasingly nonlinear. A deformation based design approach known as the continuous strength method (CSM) has been developed for room temperature steel design and extended in this paper to the design of steel elements at elevated temperatures. A simple bi-linear (elastic, linear hardening) material stress-strain model, which makes use of the elevated temperature 0.2% proof strength and strength at 2% strain, is employed. Compression and bending resistances predicted using the CSM have been compared with numerical and experimental results and those obtained using EC3 Part 1.2; the predictions are significantly more accurate and more consistent than those given by the existing method.

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