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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" }