EXPERIMENTAL STUDY ON BENDING BEHAVIOUR OF TRIANGULAR WEB PROFILE STEEL BEAM SECTION

Abstract

A triangular web profile (TRIWP) steel section is a section made of two flanges connected to a slender web. The web and the flanges can be produced from different steel grades depending on design requirements. The flanges width and thickness is determined based on the depth of the section. The web is corrugated at regular interval into triangular shape along the length of the beam. This paper describes an experimental study on the bending behavior in major (Ix) and minor (Iy) axes of Triangular Web Profile (TRIWP) compared to flat web (FW) steel sections. Two types of sizing involved which is 200×100×6×3mm and 180×75×5×2mm section. Each of beam section was modeled using several spans such as 3m, 4m and 4.8m. It was observed that the TRIWP section had a higher stiffness about minor axis compared to that of FW steel section but has lower stiffness about major axis. The analyses results show that the flexural stiffness for TRIWP1 is 0.794 times the Ix of the flat web steel section (FW1). Meanwhile, the flexural stiffness for TRIWP1 is 1.429 times the Iy of the flat web steel section (FW1). The findings for section TRIWP2 found to be similar to that of TRIWP1. For the section TRIWP2, it was observed that the value of Ix of TRIWP is 0.780 times the Ix of FW steel section which is less than that of FW. The Iy of TRIWP is 1.393 times the Iy of FW steel section which is more than that of FW steel section.