Elastoplastic Bending Load - Carrying Capacity of Steel Members

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Juhás, Pavol^1

Institute of Technology and Business in eské Budjovice, Department of Civil Engineering, Okruní 517/10, eské Budjovice

370 01, Czech Republic^1

关键词: Bending resistance;    Buckling resistance;    Elasto-plastic bending;    Material utilization;    Plastic calculation;    Steel cross sections;    Structural steels;    Theoretical investigations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/2/022084/pdf
DOI  :  10.1088/1757-899X/245/2/022084

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Many members of steel structures are subjected mostly to bending. In these cases can be especially very useful to use by resources also plasticity of structural steels. Therefore, the new international and national standards for the design of steel structures allow the elastic and plastic calculation methods and procedures. The elastoplastic bending load-carrying capacity of steel members depends in a high degree on local stability of their webs and flanges. From local stability aspects the steel members can have compact or slender cross-sections. The compactness of steel cross-sections is only relative. It depends on the loading level or material utilization, and on the buckling resistance of their webs and flanges in the most loaded cross-sections and areas. The judgment of steel cross-sections compactness in this content is complicated stability problem. The new standards for the design of steel structures contain the specific classification of the cross-sections due to dimensions and slenderness of their compression and bending parts. The paper contains the results of the experimental-theoretical investigation of the elastoplastic local stability and load-carrying capacity of steel members. The proposed methodology enables the elastoplastic calculation of the cross-section bending resistance depending from the limit development of plastic strains.