Stability and Resistance of Steel Continuous Beams with Thin-Walled Box Sections

Archives of civil engineering

K. Brzezińska^1¹  A. Szychowski^2² 

[1] Kielce University of Technology, 25-314, Kielce, Poland^1;Kielce University of Technology, 25-314, Kielce, Poland^2

关键词: thin-walled elements;    box sections;    continuous beam;    local critical resistance;    design ultimate resistance;   

DOI  :  10.2478/ace-2018-0048

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

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.

【 授权许可】

Unknown