Lateral-torsional Buckling Of Ferritic Stainless
Steel Beams In Case Of Fire
Author(s)
P. Vila Real, N. Lopes, L. Silva & J.-M. Franssen
Abstract
This work presents a numerical study of the behaviour of ferritic stainless steel
I-beams subjected to lateral-torsional buckling and compares the obtained results
with the beam design curves of Eurocode 3. New formulae, for the
lateral-torsional buckling, that approximate better the real behaviour of ferritic
stainless steel structural elements in case of fire are proposed. These new
formulae were based on numerical simulations using the program SAFIR, which
was modified to take into account the material properties of the stainless steel.
Keywords: ferritic, stainless steel, Eurocode 3, numerical modelling, lateraltorsional
buckling, fire.
1 Introduction
There are five basic groups of stainless steels, classified according to their
metallurgical structure: the austenitic, ferritic, martensitic, duplex austeniticferritic
and precipitation-hardening groups [1]. Austenitic stainless steels provide
a good combination of corrosion resistance, forming and fabrication properties.
Duplex stainless steels have high strength and wear resistance with very good
resistance to stress corrosion cracking. The most commonly used grades,
typically referred to as the standard austenitic grades, are 1.4301 (widely known
as 304) and 1.4401 (widely known as 316). The austenitic stainless steels are
generally the more useful groups for structural applications but increasing
interest in ferritic steels for structural purposes has been recently noted due to its
low cost. The responsibility of the final cost of the austenitic stainless steel is the
price of nickel. Typically they contain 8.0-13.0% of nickel whereas ferritic
Keywords
ferritic, stainless steel, Eurocode 3, numerical modelling, lateraltorsional
buckling, fire.
Related Book
Other papers in this volume
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