Open AccessStability and Resistance of Steel Continuous Beams with Thin-Walled Box Sections
Author(s) -
Karolina Brzezińska,
Andrzej Szychowski
Publication year - 2018
Publication title -
archives of civil engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.208
H-Index - 15
eISSN - 2300-3103
pISSN - 1230-2945
DOI - 10.2478/ace-2018-0048
Subject(s) - buckling , flange , structural engineering , beam (structure) , materials science , compression (physics) , bending , stress (linguistics) , span (engineering) , bar (unit) , cross section (physics) , composite material , engineering , physics , linguistics , philosophy , quantum mechanics , meteorology
The issues of local stability and ultimate resistance of a continuous beam with thin-walled box section (Class 4) were reduced to the analysis of the local buckling of bilaterally elastically restrained internal plate of the compression flange at longitudinal stress variation. Critical stress of the local buckling was determined using the so-called Critical Plate Method (CPM). In the method, the effect of the elastic restraint of the component walls of the bar section and the effect of longitudinal stress variation that results from varying distribution of bending moments were taken into account. On that basis, appropriate effective characteristics of reliable sections were determined. Additionally, ultimate resistances of those sections were estimated. The impact of longitudinal stress variation and of the degree of elastic restraint of longitudinal edges on, respectively, the local buckling of compression flanges in the span section ( p ) and support section ( s ) was analysed. The influence of the span length of the continuous beam and of the relative plate slenderness of the compression flange on the critical ultimate resistance of box sections was examined.