The Open Mechanics Journal

2013, 7 : 01-09
Published online 2013 August 07. DOI: 10.2174/1874158401206010014
Publisher ID: TOMECHJ-7-1

The Neutral Line Concept in Hot-Rolled Steel Cross-Sections

Ioannis G. Raftoyiannis and George T. Michaltsos
Department of Civil Engineering, National Technical University of Athens, Greece.

ABSTRACT

The present work deals with the effect of the thermally-induced residual stresses on the shape of a crosssection’s neutral line for hot-rolled steel beams under combined loading conditions. In general, the neutral line of a beam cross-section is considered to be straight. In this study it is shown that, taking into account the existing thermal residual stresses, this line becomes a curve as far as the beam is subjected to pure bending or to combined loading that consists of a bending moment and an axial force.

Keywords:

Steel sections, Hot-rolled sections, Neutral line, Thermal stresses, Residual stresses.