Abstract
A triangular web profile (TRIWP) steel section is a structural steel section that is made up of two flanges connected to a web plate of triangular profile. As a newly proposed section, limited research have been carried outto study the characteristic, behaviour and the advantages offered by this section compared to the normal flat web (I-beam) and other types of corrugated web steel section. One of the area that still not been studied is the capability of this section to resist thelateral torsional buckling moment compared to the normal flat web. The objective of this thesis is to study the lateral torsional buckling behaviour of triangular web profile (TRIWP) steel section. This study involved modelling of 60 beam models (30 TRIWPand 30 FW) derived from four main model using LUSAS Modeller version 14.0 to investigate buckling resistance. There are three spans that have been used which are 3 m, 4 m and 4.8 m. For a conclusion TRIWP steel section has higher buckling moment resistance, Mcr compared to FW steel section.
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