Publication detail

STRENGTHENING OF AXIALLY LOADED COLUMNS UNDER LOAD

VILD, M. BAJER, M.

Original Title

STRENGTHENING OF AXIALLY LOADED COLUMNS UNDER LOAD

Type

conference paper

Language

English

Original Abstract

This paper refers about behaviour and capacity of strengthened rods while under static load. A thin-walled T profile is subjected to axial force and a second flange is welded to the T profile thus creating an I profile. When the T profile is pressed, local buckling of thin web causes an eccentricity of loading force and therefore an additional bending moment. Because of initial stresses and deflected shape of the T profile, the strengthened I profile has lower resistance in comparison with a regular welded I profile. Knowing the loading sequence and a shape of imperfections of the newly created I profile, the reduction factor can be determined. Current standards do not refer to this problem. Analytical solution variants based on methods used in Eurocodes are introduced: the conservative approach using effective characteristics of T profile for calculation of stress from preload; the approach using full area of T profile; the approach using full area of I profile neglecting the loading history. The variant analytical solutions are compared with a finite element model in Midas FEA code. An experiment, described in this paper, is being prepared to validate the results from finite element models and suggested analytical approach.

Keywords

Buckling, strengthening under load, thin-walled columns

Authors

VILD, M.; BAJER, M.

RIV year

2014

Released

10. 9. 2014

Publisher

ECCS European Convention for Constructional Steelwork

Location

Brussels, Belgium

ISBN

978-92-9147-121-8

Book

EUROSTEEL 2014, 7th European Conference on Steel and Composite Structures

Pages from

201

Pages to

202

Pages count

2

BibTex

@inproceedings{BUT109433,
  author="Martin {Vild} and Miroslav {Bajer}",
  title="STRENGTHENING OF AXIALLY LOADED COLUMNS UNDER LOAD",
  booktitle="EUROSTEEL 2014, 7th European Conference on Steel and Composite Structures",
  year="2014",
  pages="201--202",
  publisher="ECCS European Convention for Constructional Steelwork",
  address="Brussels, Belgium",
  isbn="978-92-9147-121-8"
}