1. School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Pulau Pinang 14300, Malaysia 2. Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai Johor 81310, Malaysia
A triangular web profile (TriWP) is a modified section where the flanges are connected to a web plate of triangular profile. This study examined the torsional behavior of TriWP steel sections and compared to that of the flat web (FW) steel sections. Three types of specimen sizes were used: 180 mm × 75 mm × 5 mm × 2 mm, 200 mm × 100 mm × 8 mm × 6 mm, and 200 mm × 100 mm × 6 mm × 5 mm. All the specimens were loaded vertically until the maximum load was achieved and then the load was released. For both types of specimens, it was observed that the torsional rotation for bigger size [200 mm × 100 mm × 8 mm × 6 mm] were smaller than that of smaller size [180 mm × 75 mm × 5 mm × 2 mm] of the specimens. At the maximum torsional loading, the experimental result was compared to the theoretical calculation. The comparison showed that the percentage difference ranged from 1.10% to 16.80%. From the graph of torsional load versus rotational angle, the torsional rotation for all TriWP steel sections were smaller than that of the FW steel section under the same torsional loading i.e., 0.2 kNm and 1 kNm. The range between FW and TriWP were 3.74 to 71.83 at 0.2 kNm while 14.5 to 75.1 at 1.0 kNm. The findings were shown that the TriWP steel sections had better resistance against torsion in comparison to FW steel section.
Effect of web corrugation angle on bending performance of TriWP
The deflection of 45° and 75° web corrugation angle were the lowest deflection value either in minor or major axis of TriWP.
De’nan and Hashim [22]
TriWP subjected to bending
The deflection of TriWP was more in major axis (Ix) and less in minor axis (Iy). So, the TriWP steel section had a higher resistance to bending about minor axis than flat web steel section.
De’nan et.al [20]
Effect TriWP on the shear behavior
TriWP had a higher shear capacity compared to that of normal flat web profile section.
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