Lateral Torsional Buckling Effect on I- Section With Flange Bracing as Per IS 800:2007

Author:

Pandit Poornachandra1ORCID,Venkata Praneeth D1,Rahmatulla Mohammad2

Affiliation:

1. Manipal Institute of Technology

2. Pennar Industries Ltd

Abstract

Abstract The lateral-torsional buckling occurs in a beam when the beam's unsupported length is greater. The beam will fail by lateral-torsional buckling when the compression flange is free to rotate and displace laterally. The lateral stability of the I-section is an important factor in the design of pre-engineered buildings. The design to resist the bending and twisting in the frame I-section that is rafter and column in lateral direction flange bracing acts as a restraint to resist lateral-torsional buckling. The top flange is connected with purlins to act as a lateral restraint. The bottom flange torsional moment is resisted by flange bracing. Increasing the flange bracing decreases the unsupported length of the compression flange, so there is a decrease in lateral-torsional buckling. If the non-dimensional slenderness ratio ( λlt < 0.4 ) the section is said to be laterally supported, according to IS 800. In this paper, how the lateral-torsional buckling affects when the restraints are provided at different intervals and how the section will be affected when the flange width, thickness, web depth and thickness changes.

Publisher

Research Square Platform LLC

Reference26 articles.

1. Standards I, “IS 800 (2007) : General Construction In Steel - Code of Practice.”

2. Beam I To Lateral Torsional Buckling

3. Lateral torsional buckling of partially restrained beams of high strength S690 welded I-sections;Wang K;J Constr Steel Res

4. Narayanan N, Subramanian (2010) Steel structures: design and practice. Oxford University Press

5. De’nan F, Nazri FM, Hashim NS, “FINITE ELEMENT ANALYSIS ON LATERAL TORSIONAL BUCKLING BEHAVIOUR OF I-BEAM WITH WEB OPENING (2017),” Engineering Heritage Journal, vol. 1, no. 2, pp. 19–22, doi: 10.26480/gwk.02.2017.19.22

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