Experimental Investigation of Cold-Formed Steel Section- Flexural Member with Triangular Web (original) (raw)
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The objective of this paper is to study the flexural behaviour of cold formed I –section with triangular corrugation. The effect of parametric change on the flexural strength of cold formed steel (CFS) I section is presented in this paper. The web is corrugated at regular interval into a triangular shape along the length of the beam. Totally twelve specimens are theoretically and analytically analysed by changing depth of corrugation, hw also span. All specimens are numerically analysed under two point loading with simply supported condition. The theoretical results are verified with finite element analysis using ABAQUS software. Theoretical analysis is done with code provision of AISI S100-2007, AS/NZS 4600:2005 specification. Within the parametric study the effect of corrugation in web on the flexural strength capacity is discussed and presented.
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.
Study on the flexural and compressive behavior of cold-formed steel sections with and without lips
In recent year's cold formed steel have achieved a considerable growth in construction field. Since they are light weight and easy to transport they are highly employed in steel structures rather than hot rolled steel. The cold formed steel can also be made in different desirable shapes and sections. In this paper different configurations of cold formed steel sections are employed as beams and columns. The sections include different configurations including lip, stiffeners and spacing between the webs. The beams are tested for flexural and torsional behavior whereas the columns are tested for compressive behavior. Initially the specimens were analytically analyzed using finite element software and then their results are compared with the experimental results.
Cold Formed Steel Stiffened Web Sections Behaviour
There are two types of structural steel members which are used, namely hot rolled steel and cold formed steel. The use of thin-walled, cold-formed high strength steel products in the building industry has significantly increased in recent years. These products are being widely used in various applications such as purlins, girts, portal frames and steel framed housing The performance of the Cold Formed Steel (CFS) sections is affected due to buckling mode involving flexural-torsional buckling and local buckling, distortional buckling, overall buckling and their interactions, which are invariably important facets of Cold Formed Steel sections. It is therefore important that these buckling modes are either delayed or eliminated to increase the ultimate moment capacity of the CFS sections. To overcome this limitation, the webs are stiffened by means proper bending on it. Stiffeners in the web of the C-section increase the local buckling stress, distortional buckling stress of the section. Due to the stiffeners, more distortional buckling modes occur in the section. In the present numerical investigation, web of the Cold Formed Lipped C section are stiffened by means of proper bending, these web stiffened lipped channel section named as sigma section used as a purlin and their effectives is analyzed using a commercially available Finite Element Software ANSYS 12.0. Specimens are modelled analyzed in simply supported condition for varing h/t ratio and d/t ratio and Von-Mises stress and strain variations, displacement were found. This is followed by determination of the load carrying capacity using ANSYS and compared with experimental results.
FLEXURAL BEHAVIOUR OF LIGHT GAUGE COLD FORMED STEEL 'Z' AND 'HAT' SECTIONS WITH AND WITHOUT LIPS
Cold-formed steel has been widely used in modern day construction industry. The property of the cold-formed steel makes it economic and feasible. In this project, an attempt has been made in order to investigate the flexural behavior of light gauge cold formed steel 'Z' and 'HAT' sections with and without lips. The flexural behaviour is evaluated both theoretically and analytically using ANSYS and the results are compared in this study. In the analytical work, four sections were loaded vertically while the lateral deflection was unrestrained to allow flexural buckling. From the results it is evident that at any particular load sections with lips will have less deflection than sections without lips (Z, HAT) and load is taken more by sections with lips than without lips (Z, HAT).
The effective sectional area concept was adopted to conduct the analysis of cold-formed Tension members. ANSYS software was utilized to simulate the behavior of cold formed steel angle under tension load. The paper describes the results from a finite element investigation into the load capacity tension members of single angle sections of 2mm and double angles sections of 2mm under plain (without Lipped) and with Lipped conditions subjected to tension. Comparisons were made between the test results and the predictions based on both the Experimental investigation and the ANSYS analysis. Results also comparisons were made by the International codes BIS, AISI, AS/NZS and BS.
IJERT-Flexural Behavior of Cold Formed Steel Beams with end Stiffeners and Encased Web
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/flexural-behavior-of-cold-formed-steel-beams-with-end-stiffeners-and-encased-web https://www.ijert.org/research/flexural-behavior-of-cold-formed-steel-beams-with-end-stiffeners-and-encased-web-IJERTV3IS111330.pdf Cold-formed steel members are extensively used in the building construction industry, especially in residential, commercial and industrial buildings. In recent times, the use of cold-formed high strength steel members has rapidly increased.. This paper presents the results of the experimental study on the behaviour of cold-formed steel section with plain web, with end stiffened web and with encased web. The moment carrying capacity of cold-formed steel beam with plain web was studied and compared with the moment carrying capacity of beam with end stiffened web and encased .The specimens were tested under two point loading for its pure flexural behaviour. From the study, it is found that the cold-formed steel beam with end stiffened and encased web have higher load carrying capacity when compared to that of section with plain web.
FLEXURAL BEHAVIOUR OF STIFFENED MODIFIED COLD-FORMED STEEL SECTIONS–EXPERIMENTAL STUDY
The present study deals with the enhancement of the flexural capacity of cold formed steel beams using stiffeners. Beams with two back-to-back lipped channel sections were tested with and without stiffeners. Four such beams were considered with depth 150 mm and thickness of sheets 1mm and 2mm. ISMB 150 was also tested and was used as a yardstick for comparison with equivalent cold-formed sections. All the sections were subjected to “Four point flexural test” to study their behaviour in pure bending. From this study it was found that strength and stiffness of sections made out of 2mm sheets can be substantially enhanced using stiffeners whereas for 1mm sheets the enhancement was not so profound, primarily due to very high propensity for local buckling. Moreover, beams of 2mm sheets exhibited stiffness comparable to ISMB 150 in the initial loading stage.
FLEXURAL BEHAVIOUR OF LIGHT GAUGE COLD FORMED STEEL MEMBERS : COMPARISON OF IS CODE AND EURO CODE
Light – gauge steel evolved as a building material in the 1930's and reached large scale usage only after the Second World War. In comparison with conventional steel construction, where standard hot rolled shapes are used, the cold formed light gauge steel structures are relatively new development. This paper presents a study on behaviour and economical of cold formed steel (CFS) built up channel section using different codes. This paper provides an experimental investigation for the bending strength of Cold – Formed light gauge steel plain (stiffened) rectangular sections. The test specimens were brake pressed from high strength structural steel sheets. In addition, the test strengths were compared with the design strengths calculated using the Indian Standard and Euro codes Specification for Cold –Formed steel structures. Flexural members are linear members in which axial forces act to cause elongation (stretch). The theoretical data are calculated using Indian Standard code IS 801-1975 and the section properties of the specimens are obtained using IS 811-1975. The specimens are designed under uniformly distributed loading with simply supported condition. The research project aims to provide which code of practice given more economical, high bending strength, more load carrying capacity and high flexural strength. The studies reveal that the theoretical investigations limit state methods (SI method) have high bending strength, high load caring capacity, maximum deflection and minimum local buckling& distortional buckling compare to the other codes.