Structural Behaviour of Cold-formed Cut-curved Channel Steel Section Under Compression (original) (raw)
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Experimental investigation on flexural behaviour with cold-formed steel cut-curved channel
2015
This paper investigates on flexural behaviour for cold-formed steel beam. Cold-formed steel is getting popular over the years in construction industry. However, due to its thin-walled behaviour, cold-formed steel is prompt to have buckling failure. Previous research were done to provide stiffener in order to overcome this problem. Furthermore, as addressed in this paper, curved section is introduced and studied to determine its behaviour compare to straight member in handling deformation. Both straight and curved cold-formed steel were tested under flexural with different length as the investigation variable. The results were analysed for comparison. Curved section of cold-formed steel behave differently in beam and column compared to straight section. Curved section has an advantage in reducing the deflection for structural members for flexural behaviour.
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Experimental Study on Flexural Behaviour of Cold Formed Steel Section
Cold-formed steel members are extensively used in the building construction industry, especially in residential, commercial and industrial buildings. This paper presents an experimental and numerical study on the flexural behaviour of cold formed steel built-up section. Two built-up specimens were made using channel sections one with lip and the other without lip. The dimension of the channel is 200x80x2 mm. The length of the beam is kept constant for 1.25 m. All specimens are experimented under two-point loading with simply supported condition. The experimental result shows that the flexural capacity of the built-up cold formed steel beam with lip was higher than the beam without lip. The experimental results are also verified with finite element analysis using ABAQUS software. The analytical results obtained are in good agreement with the experimental results.
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Analytical and Experimental Study on Cold-Formed Steel Built-Up Sections for Bending
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In the construction of steel structures, the two most common types of structural members are hot-formed and cold-formed members. This paper mainly describes the analytical and experimental research on the strength and characteristics of CFS bolted built-up sigma sections having different structural arrangements under bending. The cross-sectional dimensions for the parametric study were selected by the sizes available in the market. In this paper, ANSYS workbench software was used to perform FE modeling and observe the local, flexural, and interaction of these buckling. Then, experimental study was performed by varying the arrangement of open section beams between face-to-face and back-to-back, connected using bolts or fasteners different spacings. Further, we conducted bending tests on cold-formed steel built-up members having simple edge stiffeners in the middle. Comparing both analytical and experimental studies, the results indicate that the back-to-back connected built-up beam s...
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BUCKLING ANALYSIS OF COLD FORMED STEEL CHANNEL SECTIONS WITH AND WITHOUT STIFFENERS
IJTIMES, 2019
The Light gauge cold-formed steel sections being used extensively in residential, industrial and commercial building as secondary load bearing members since last three decadez. In this context a study is being made to analyses C Sections with and without stiffeners to arrive at design strength criterion in compression. The direct strength method of design for cold formed steel sections has been validated over the years through research and the same has been incorporated in the standard codes of practice in the countries like USA and Australia. ABAQUS and CUFSM has been extensively used to perform Finite Element analysis and Finite Strip method of thin walled cold formed steel sections and the results are compared to each other. The analysis is being done on CUFSM and ABAQUS. The design strength curves will be arrived at using direct strength method. This is because cold-formed steel sections have a very high strength to weight ratio compared with thicker hot-rolled steel sections, and their manufacturing process is simple and cost-effective. In this context, a study is being made to analyze C sections with and without stiffeners to arrive at design strength criterion in compression members. In this study, the behavior of C sections with and without stiffeners under the action of axial loads has been carried out with various thickness and depths. In ABAQUS, the loads are applied on both ends. The clamped end conditions are considered.
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Cold-formed steel is used in large number of products. For example in metal building construction, for wall coverings, floor decking etc. Cold-formed steel is a basic component in construction of lightweight prefabricated structures like stud frame panels, trusses and portal frames.The Cold formed steel term itself make it different from hot rolled steel due to difference in manufacturing methods. Typically columns, beams and angles etc. are different globally. At room temperature cold formed steel members are formed by bending flat sheets. Cold formed steel sections mainly created using two methods those are break press through and rolling. Where hot rolled steel members are precasted. Therefore cold formed steel sections can be easily available at any place where hot rolled sections are not available. The cold formed steel components can be used for larger and complex structures. The Comparison of cold formed steel section and Hot rolled steel section of equal cross sectional area is done in this research paper. Sections were experimentally tested under axial compression in universal testing machine. Simultaneously, ultimate compressive strength of cold formed members and hot rolled members has been investigated. Also, different properties of the sections such as stresses induced in the sections, strain in the section, axial deflection, and lateral deflection are obtained experimentally. For measuring strain experimentally strain gage foils were used. The validation of results is done by preparing finite element model in ABAQUS software. From experimental work it is observed that cold formed steel sections has more load carrying capacity as compared to hot rolled steel section.
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Comparative Study and Analysis of Cold Formed Steel Columns Subjected to Axial Loading
Cold formed steel are nowadays used for building construction especially non-load bearing partitions, curved wall etc due to its flexural strength, load carrying capacity and good appearance. In this paper detailed study of cold formed steel has been carried out to predict load carrying capacity of a column using Indian Standard IS 801-1975, British Standard BS 5950-5:1998, finite element software ABAQUS. A series of parametric tests were also carried out to compare the performance of different shapes of channel sections at various lengths (500mm, 600mm and 700 mm).The results indicate that the channel sections with intermediate stiffener carry greater load and show less deformation as compared to plain channel section and lipped channel section. The details of these investigation and the outcomes are presented in this paper.
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