Web beralun digunakan untuk meningkatkan daya tahan keatas kilasan terhadap
web keluli rasuk dan untuk meningkatkan kekukuhan rasuk. Disertasi ini membentangkan
kelakuan kilasan keluli web segi tiga (TriWP) melalui ujikaji makmal. Objektif utama
adalah untuk mengkaji tingkah laku kilasan dan membandingkan dengan keluli web rata.
Tiga saiz [180 × 75 × 5 × 2 mm, 200 × 100 × 8 × 6 mm, 200 × 100 × 6 × 5 mm] daripada
keluli segi tiga web dan web rata telah digunakan dalam kajian ini. Empat pembolehubah
seperti ketebalan bebibir, ketebalan web, panjang rentang dan peningkatan beban ujikaji.
Bagi kedua-dua keluli web segi tiga (TriWP) dan keluli web rata, didapati bahawa putaran
kilasan untuk saiz yang lebih besar [200 × 100 × 8 × 6 mm] adalah lebih kecil kilasannya
berbanding dengan saiz yang kecil [180 × 75 × 5 × 2 mm ] dalam semua spesimen. Semua
spesimen dikenakan beban kilasan sehingga beban kilasan tersebut dicapai pada tahap
maksimum. Selepas beban dilepaskan ke atasnya, spesimen telah kembali ke kedudukan
asal tetapi tidak di tahap sifar. Ia menunjukkan bahawa, spesimen telah gagal. Pada beban
kilasan maksimum, keputusan eksperimen telah dibandingkan dengan pengiraan teori,
perbandingan menunjukkan bahawa perbezaan kurang daripada 17%. Dimana diterima
kerana nilai maksimum untuk ujian makmal adalah 20%.Putaran kilasan untuk semua
keluli web segi tiga (TriWP) adalah lebih kecil daripada keluli web rata di bawah beban
kilasan yang sama (0.2 kNm dan 1 kNm). Nilai tersebut telah dipilih dari graf beban
kilasan melawan petaran kilasan. Hasil kajian ini telah menunjukkan bahawa keluli keratan
web segi tiga mempunyai rintangan yang lebih baik ke atas kilasan berbanding dengan
keluli web rata.
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Corrugated webs are used to increase the resistance against torsion of the steel
webs of beams and to increase the stiffness of the beam. This dissertation presents the
torsional behavior of triangular web profile (TriWP) steel section by experimental study.
The main objective is to study the torsional behavior and to compare it to that of flat web
steel section. Three sizes [180×75×5×2 mm, 200×100×8×6 mm, and 200×100×6×5 mm]
of triangular web profile steel section and flat web have been used in this study. Four
variables such as thickness of flange, thickness of the web, span length and incremental
loading were tested. For both triangular web profile (TriWP) steel section and flat web
steel section, it was observed that the torsional rotation for bigger size [200×100×8×6 mm]
were smaller than that of small size [180×75×5×2 mm] of the specimens. All the
specimens were loaded until maximum load was achieved. After the specimens were
unloaded, the specimens returned to approximately the original position with non-zero
rotation. At the maximum torsional loading, the experimental result was compared to the
theoretical calculation. The comparison shows that the differences were less than 17 %
which acceptable since the maximum value for lab testing is 20%. The torsional rotation
for all triangular web profile (TriWP) steel section were smaller than of the flat web steel
section under the same torsional loading (0.2 kNm and 1 kNm). 0.2 kNm and 1 kNm were
chosen from the torsional load versus rotation curve. It was shown that the triangular web
profile steel sections have better resistance against torsion in comparison to flat web steel
section.
Torsional behavior of triangular web profile (triwp) steel section by experimental study / Hazwani Hasan