Sejak Dynasti Rom hingga abad 20-an, struktur gerbang telah digunakan secara
meluas dalam semua pembinaan bidang kejuruteraan seperti sistem pembetungan,
struktur bawah tanah dan struktur pertahanan negara. Pembaharuan perlu
ditambahbaik dalam bebanan untuk memenuhi keperluan yang semakin canggih
dalam bidang pengangkutan, kuantiti bahan mentah and juga kaedah analisa. Oleh itu,
kefahaman kami tentang kelakuan gerbang perlu diperdalam lagi.
Kelakuan struktur gerbang bagi jarak gerbang antara 10m hingga 30m dianalisa
dengan penggunaan perisian FEM. Dengan mengambil kira pembebanan jisim
gerbang, berat tanah and berat hidup, perubahan daya paksi, daya ricih, momen
lentur dan daya tindakbalas diperhatikan. Kelakuan struktur termasuk daya paksi,
daya ricih dan momen lentur dalam kedua-dua bidang bentuk gambarajah dan
magnitud. Kajian ini memperdalam lagi kefahaman tentang kelakuan struktur
gerbang apabila jarak dan tinggi struktur berubah.
Dari keputusan analisa, dengan pertambahan nisbah ketinggian terhadap jarak
gerbang, perubahan untuk daya paksi maksimum, daya ricih, daya tindakbalas and
momen juga semakin bertambah.
Kajian terhadap struktur gerbang yang terbenam di bawah tanah adalah sangat
penting untuk rekabentuk masa hadapan. Pada masa yang akan datang, rekabentuk
bagi gerbang akan menjadi lebih tahan lasak, mengurangkan kos dan juga menjaga
alam sekitar.
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Since the Romanian Empire until twentieth century, the arch structures are widely
applied in all fields of engineering constructions, from bridge, subways, and
underground structures to military shelters. The loadings are altered to fulfill the
specific demand in transportation systems, materials quantity and the analysis
methods. Therefore, we should improvise our understandings on structural
behaviour.
The behaviour of buried structural arch for span 10m to 30m are analyzed with finite
element method. The structural behaviours include the axial force, shear force and
bending moment in both distributions diagram and magnitude. By applying three
types of load cases, that is self-weight, fill weight and live load, the behaviours of
arch for axial force, shear force, bending moment, horizontal and vertical reaction are
observed. This research provides a better understanding about the behaviours on
buried arch with various rises to span ratio.
From the analysis on the behaviours of buried arch by finite element method, the
change in arch rise to span ratio for three types of load cases show the increment in
maximum axial force, shear force, bending moment, horizontal and vertical reaction.
Investigation for buried arch structures with different rise to span ratio is importance
for future designs of arch structures, with higher quality, durability and strength.
Lastly, future design of arch structures will be able to achieve longer life cycle, cost
effectiveness and environmental friendly.
An investigation on the behaviours of buried structural arch culvert with varying rise span ratio / Liow Syuk Chin