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A study on the structural behaviour of precast concrete arch bridge with corrugated section

A study on the structural behaviour of precast concrete arch bridge with corrugated section / Yeo Jia Bin
Struktur gerbang telah menjadi salah satu bentuk struktur tertua kejuruteraan jambatan. Oleh kerana nilai estetik jambatan gerbang, ia digunakan secara meluas sebagai menyeberang lembah dan sungai pada masa kini. Jambatan gerbang spandrel tertutup adalah satu jenis jambatan gerbang yang telah dihasilkan dengan menggunakan teknologi konkrit pratuang sejak 1965. Pelbagai bentuk keratan rentas untuk jambatan konkrit pratuang telah dicadangkan. Bentuk beralun adalah bahagian baru yang diperkenalkan pada tahun 2008 oleh Rivo Precast Sdn. Bhd. Dalam usaha untuk lebih memahami kelakuan struktur keratan beralun baru ini dan untuk mencapai reka bentuk yang lebih menjimatkan, ia adalah penting untuk mengetahui prestasi bahagian beralun dengan pelbagai nisbah ketebalan bebibir untuk web dan kedalaman keseluruhan. Kesan nisbah kelangsingan pada pratuang segmen gerbang konkrit keratan beralun juga dikaji. Analisis pengiraan dilakukan untuk menganalisis kelakuan struktur segmen gerbang keratan beralun. Sebanyak 25 model dengan pelbagai nisbah ketebalan bebibir untuk web dan kedalaman keseluruhan adalah dicadangkan. Ketinggian bersih dan rentang bersih jambatan adalah 5.8m dan 20.6m masing-masing. Analisis ini dijalankan dengan menggunakan perisian analisis PLAXIS dan LUSAS. Dalam analisis ini, segmen gerbang telah diuji di bawah beban roda yang berbeza yang berasaskan British Standard Highway Live Load (BS 5400-2: 2006). Tekanan dan ketegangan utama telah diperhatikan. Ia telah didapati bahawa tegasan tegangan maksimum berlaku di bahagian dalaman web dan bebibir atas bahagian yang beralun di mahkota gerbang. Tegasan tegangan maksimum keratan beralun di daerah pinggang berlaku di bahagian luar web dan bebibir atas. Kajian ini menunjukkan bahawa nisbah kelangsingan yang tinggi dalam keratan beralun menghasilkan tekanan dan tegangan yang rendah di mahkota keratan tetapi tekanan dan tegangan tinggi dalam bahagian di daerah pinggang keratan. Nisbah bebibir untuk ketebalan web tidak signifikan kepada tekanan dan tegangan maksimum yang menyebabkan pada bahagian beralun. _______________________________________________________________________________________________________ Arch structures have become one of the oldest structural form of bridge engineering. Due to the aesthetic value of arch bridges, it is widely used as crossing over valleys and rivers nowadays. Closed spandrel arch bridge is one type of arch bridges that have been produced using precast concrete technology since 1965. Various cross-sectional shapes for precast concrete bridge have been proposed. Corrugated shape is a relatively new section which was introduced in 2008 by Rivo Precast Sdn. Bhd. In order to understand better the structural behaviour of this new corrugated section and to achieve a more economical design for such, it is important to know the performance of the corrugated section with various ratio of flange to web thickness and overall depth. The effect of slenderness ratio on precast concrete arch segment with corrugated section is also studied. Computational analysis is carried out to analyse the structural behaviour of the arch segment with corrugated section. A total of 25 models with various ratio of flange to web thickness and overall depth is proposed. The clear rise and clear span of the bridge is 5.8m and 20.6m respectively. The analysis was carried out using the analysis software PLAXIS and LUSAS. In the analysis, the arch segment was tested under different wheel loadings which were based British Standard Highway Live Load (BS 5400-2:2006). The major principal stress and strain were observed. It was found that the maximum tensile stress happened at the internal part of the web and top flange of the corrugated section at crown. The maximum tensile stress for corrugated section at haunch happened on the exterior part of the web and top flange. The study shows that high slenderness ratio of the corrugated section result in lower stress and strain in the section at crown but higher stress and strain in the section at haunch. The ratio of flange to web thickness contributess insignificantly to the maximum stress and strain resulted on the corrugated section.
Contributor(s):
Yeo Jia Bin - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875005562
Language:
English
Subject Keywords:
Arch; structural; bridge
First presented to the public:
6/1/2015
Original Publication Date:
7/21/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 100
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-07-21 12:18:42.135
Submitter:
Mohd Jasnizam Mohd Salleh

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