Publication detail

Torsional Restraint Problem of Steel Cold-Formed Beams Restrained by Planar Members

BALÁZS, I. MELCHER, J. PEŠEK, O.

Original Title

Torsional Restraint Problem of Steel Cold-Formed Beams Restrained by Planar Members

Type

journal article in Web of Science

Language

English

Original Abstract

The effect of continuous or discrete lateral and torsional restraints of metal thin-walled members along their spans can positively influence their buckling resistance and thus contribute to more economical structural design. The prevention of displacement and rotation of the cross-section results in stabilization of the member. The restraints can practically be provided e.g. by planar members of cladding supported by metal members (purlins, girts). The rate of stabilization of a member can be quantified using values of shear and rotational stiffness provided by the adjacent planar members. While the lateral restraint effected by certain shear stiffness can be often considered as sufficient, the complete torsional restraint can be safely considered in some practical cases only. Otherwise the values of the appropriate rotational stiffness provided by adjacent planar members may not be satisfactory to ensure full torsional restraint and only incomplete restraint is available. Its verification should be performed using theoretical and experimental analyses. The paper focuses on problem of steel thin-walled cold-formed beams stabilized by planar members and investigates the effect of the magnitude of the rotational stiffness provided by the planar members on the resistance of the steel members. Cold-formed steel beams supporting planar members of cladding are considered. Full lateral restraint and incomplete torsional restraint are assumed. Numerical analyses performed using a finite element method software indicate considerable influence of the torsional restraint on the buckling resistance of a steel thin-walled member. Utilization of the torsional restraint in the frame of sizing of a stabilized beam can result in more efficient structural design. The paper quantifies this effect for some selected cases and summarizes results of numerical analysis.

Keywords

Beam; buckling; stabilization; steel; torsional restraint

Authors

BALÁZS, I.; MELCHER, J.; PEŠEK, O.

Released

4. 11. 2017

Publisher

IOP Publishing

Location

Bristol

ISBN

1757-8981

Periodical

IOP Conference Series: Materials Science and Engineering

Year of study

245

Number

3

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

9

Pages count

9

URL

http://iopscience.iop.org/article/10.1088/1757-899X/245/3/032057

Full text in the Digital Library

http://hdl.handle.net/11012/137157

BibTex

@article{BUT141034,
  author="Ivan {Balázs} and Jindřich {Melcher} and Ondřej {Pešek}",
  title="Torsional Restraint Problem of Steel Cold-Formed Beams Restrained by Planar Members",
  journal="IOP Conference Series: Materials Science and Engineering",
  year="2017",
  volume="245",
  number="3",
  pages="1--9",
  doi="10.1088/1757-899X/245/3/032057",
  issn="1757-8981",
  url="http://iopscience.iop.org/article/10.1088/1757-899X/245/3/032057"
}