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Naganathan, Sivakumar
- Experimental Study of Axially Compressed Cold Formed Steel Channel Columns
Abstract Views :588 |
PDF Views:183
Authors
Affiliations
1 Bentley Systems (Singapore) Pvt. Ltd. 30 Raffles Place, #12-02/30, Chevron House, SG
2 Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000, Kajang, Selangor, MY
1 Bentley Systems (Singapore) Pvt. Ltd. 30 Raffles Place, #12-02/30, Chevron House, SG
2 Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000, Kajang, Selangor, MY
Source
Indian Journal of Science and Technology, Vol 6, No 4 (2013), Pagination: 4249-4254Abstract
Analysis and design of axially compressed cold formed steel channel section presented in this paper was conducted through experimental study, design based on British standards and North American Specification for the design of cold-formed steel structural members. More than 18 laboratory experiments were undertaken first on these steel channel columns under axial compression. A series of parametric studies were also carried out by varying the thickness and column length. All of these columns failed by local and distortional buckling. The test results were compared with American (AISI-2007) and British Standards (BS5950-Part5) for the design of cold-formed steel structural members. The details of these investigation and the outcomes are presented in this paper.Keywords
Cold Formed Channel Sections, Axially Compressed Members, BS5950, Effective Width Method, Direct Strength MethodReferences
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- Capacity Assessment and Design of CFRP-Strengthened Steel Channel Columns
Abstract Views :550 |
PDF Views:144
Authors
Affiliations
1 Universiti Tenaga Nasional, Jalan IKRAM UNITEN, 43000, Kajang, Selangor, MY
2 Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000, Kajang, Selangor, MY
1 Universiti Tenaga Nasional, Jalan IKRAM UNITEN, 43000, Kajang, Selangor, MY
2 Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000, Kajang, Selangor, MY
Source
Indian Journal of Science and Technology, Vol 6, No 4 (2013), Pagination: 4255-4261Abstract
This paper presents a design method (BS5950-5) to predict the allowable load carrying capacity of cold formed steel channel section strengthened by carbon fiber reformed polymer composites applied to the web of the beam. A specimen is presented to illustrate the proposed design approach. The validity of the proposed design method has been verified by comparing with the experimental test results. A series of compression tests were conducted on plain and CFRP strengthened steel sections of different geometries. This paper also contains the consequences obtained by comparing the strengths of plain and CFRP strengthened steel columns using compression test. The findings showed that the strength of CFRP strengthened steel columns were up to 10% greater than plain cold form steel sections.Keywords
CFRP, CFRP Strengthening, Axial Compression, Cold Formed SteelReferences
- Silvestre N, Young B et al. (2008). Non-linear behavior and load-carrying capacity of CFRP-strengthened lipped channel steel columns, Engineering Structures, vol 30(10), 2613-2630.
- Silvestre N, Camotim D et al. (2009). On the use of the EC3 and AISI specifications to estimate the ultimate load of CFRP-strengthened cold-formed steel lipped channel columns, Thin-Walled Structures, vol 47(10), 1102-1111.
- Wu C, Zhao X et al. (2011). Design rules for web crippling of CFRP strengthened aluminum rectangular hollow sections, Thin-Walled Structures, vol 49(10), 1195-1207.
- Haedir J, Zhao X -L et al. (2010). Analysis of CFRP externally-reinforced steel CHS tubular beams, Composite Structures, vol 92(12), 2992-3001.
- Haedir J and Zhao X -L (2011). Design of short CFRP-reinforced steel tubular columns, Journal of Constructional Steel Research, vol 67(3), 497-509.
- Bambach M R, Jama H H. et al. (2009). Axial capacity and design of thin-walled steel SHS strengthened with CFRP, Thin-Walled Structures, vol 47(10), 1112-1121.
- Zhao X and Al-Mahaidi R (2009). Web buckling of light steel beams strengthened with CFRP subjected to end-bearing forces, Thin-Walled Structures, vol 47, 1029-1036.
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- Lanier B, Schnerch D et al. (2009). Behavior of steel monopoles strengthened with high-modulus CFRP materials, Thin-Walled Structures, vol 47(10), 1037-1047.
- Haghani R (2010). Analysis of adhesive joints used to bond FRP laminates to steel members a numerical and experimental study, Construction and Building Materials, vol 24(11), 2243-2251.
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- Wua C, Zhao X et al. (2012). Bond characteristics between ultra-high modulus CFRP laminates and steel, Thin-Walled Structures, vol 51, 147-157.
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- British Standard BS5950-5, (1998). Structural use of steelwork in building-Part 5, Code of practice for design of cold formed thin gauge sections. British Standards Institution, UK.
- Cost Effectiveness of CFRP Repair Technique for Cold Formed Steel Beams
Abstract Views :189 |
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Authors
Nahushananda Chakravarthy
1,
Sivakumar Naganathan
1,
Raed Saleh Ali Ba Bhakri
1,
Sreedhar Kalavagunta
2,
Kamal Nasharuddin Bin Mustapha
1,
H. G. Phalguna
3
Affiliations
1 Department of Civil Engineering, Universiti Tenaga Nasional, 43000, Selangor, MY
2 Bentley Systems (Singapore) Pvt. Ltd, 048622, SG
3 Mercedes Benz Research and Development India Pvt Ltd, Bangalore - 560066, Karnataka, IN
1 Department of Civil Engineering, Universiti Tenaga Nasional, 43000, Selangor, MY
2 Bentley Systems (Singapore) Pvt. Ltd, 048622, SG
3 Mercedes Benz Research and Development India Pvt Ltd, Bangalore - 560066, Karnataka, IN
Source
Indian Journal of Science and Technology, Vol 10, No 18 (2017), Pagination:Abstract
Objectives: Structural steel can be broadly classified into hot rolled steel and cold formed steel (CFS). CFS manufactured from roll forming or press braking operation. The main advantage of CFS sections are thin wall and light weight. These thin wall leads to buckling of structural member. This paper aims to study the capacity of Carbon Fibre Reinforced Polymer (CFRP) strengthened CFS channel beams, buckling behaviour, deflection and cost studies on CFRP strengthening. Methods/Statistical analysis: In this study three different length of CFS channel sections are selected for testing in which beams are tested for bending. All the beams were tested in plain section and CFRP strengthened series in universal testing machine. Findings: Experimental results shows the enhancement in capacity of beam due to CFRP strengthening. The local and distortional buckling modes were observed as failure modes. Experimental results were compared with maximum load resistance calculated by AISI specification which are in good agreement. Cost studies were compared on replacing a new member with CFRP strengthened channel member. Improvements/Applications: CFRP strengthening is suitable for enhancement of capacity of beams and repair. This CFRP strengthening technique can applied to reinforced concrete members, hot rolled steel, in filled steel tubes and bridges etc.Keywords
Beam, CFRP, CFS, Channel, Cost, Repair- Behaviour of Post-tensioned Interlocking Bricks for Masonry Wall Subjected to Out-of-plane Loads
Abstract Views :212 |
PDF Views:0
Authors
Affiliations
1 Department of Civil Engineering, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, MY
1 Department of Civil Engineering, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, MY
Source
Indian Journal of Science and Technology, Vol 10, No 21 (2017), Pagination:Abstract
Objectives: To investigate the post-tensioning behavior of the soil-cement interlocking bricks used in masonry wall subjected to out-of-plane loads. Methods/Statistical Analysis: Three types of wall specimen were tested with post-tensioned forces of 50% and 65% of maximum post-tension force. The wall specimens were tested horizontally after applying the post-tensioning force by applying two vertical point loads distributed equally along the wall. Findings: Results showed that service load and ultimate load for W1 are 6.2 KN and 9.5 KN respectively. The mentioned loads for W2 were 7 KN and 11.8 KN respectively. The maximum deflection occurred in W1 and W2 was 69 mm and 32 mm respectively. On the other hand, the service load and ultimate load for the post-tensioned wall with two tendons were found to be 14 KN and 20 KN respectively. The deflection in both cases was approximately same which it reaches up to 59mm. It can be concluded that post-tensioning level of interlocking bricks should be always from 60% to 65% in order to get optimum results for service ability and ultimate limit states. Application/Improvements: The post-tensioned wall developed using soil-cement interlocking blocks can be used in reinforced and post-tensioned masonry applications instead of conventional brick masonry. The post tensioning enhances the performance of brick masonry.Keywords
Deflection, Masonry Wall, Post-Tensioning, Soil-Cement Interlocking Bricks, Ultimate Load- Coal Bottom Ash as Sustainable Material in Concrete – A Review
Abstract Views :231 |
PDF Views:0
Authors
Siti Nabihah Sadon
1,
Salmia Beddu
1,
Sivakumar Naganathan
1,
Nur Liyana Mohd Kamal
1,
Hamdan Hassan
2
Affiliations
1 Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Jln IKRAM-UNITEN, Kajang - 43000, Selangor, MY
2 Tenaga Nasional Berhad Research, No 1, Lorong Air Hitam, Kawasan Institusi Penyelidikan, Kajang - 43000,Selangor, MY
1 Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Jln IKRAM-UNITEN, Kajang - 43000, Selangor, MY
2 Tenaga Nasional Berhad Research, No 1, Lorong Air Hitam, Kawasan Institusi Penyelidikan, Kajang - 43000,Selangor, MY