Finite element analysis of the loading position effects to the bending behaviour of triangular web profile steel section

Abstract

Loading position effect on the bending behaviour of triangular web profile (TRIWP) steel section is presented in this paper. A TRIWP steel section was made by the connection two flanges to a web plate triangular profile, which were analysed using LUSAS finite element software. The study involved 3000, 4000 and 4800 mm span of TRIWP steel sections with size 200 × 100 × 6 × 3 mm and 180 × 75 × 5 × 2 mm, respectively. Three types of loading positions were studied: the middle of the slanting part, the upper corner and the lower corner (of the corrugation profile). It was observed that the middle of the inclined part loading position contributes lower deflection compared to the others loading position. This was true for both deflection in major axis of TRIWP1 and TRIWP2 steel section. This was due to the middle position (inclined part) of the web section, which is more stiffen between the upper and lower positions of the web. Meanwhile, for the minor axis, the deflection value of inclined part is nearly close to the upper and lower loading position results, although the deflection value of the inclined part is the highest compared to the other loading positions.