Strengthening of web perforated CFS lipped channel columns with CFRP: a numerical study

Vivek, K. S.; Baskar, R.

doi:10.1007/s41062-023-01174-x

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…It is evident that sheathing significantly boosts load-car rying capabilities when compared to bare steel columns; specifically, sheathing with the more durable OSB panels on both sides of the CFS studs resulted in a capacity gain o around 100% [52]. By fortifying the columns with carbon fiber-reinforced polymer (CFRP) the post-buckling behavior and axial capacity of short columns with lipped channels and web openings susceptible to local-distortional interactive buckling were improved [53]. The failure type and compression strength of sheathed CFS built-up nested channel (NC) studs were greatly affected by the plywood and stud-to-board screw connections.…”

Section: The Influence Of Sheathing and Benefits In Cfs Constructionmentioning

confidence: 99%

Investigating the Factors Influencing the Strength of Cold-Formed Steel (CFS) Sections

Hussein,

Hussein

2024

Buildings

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The utilization of cold-formed steel (CFS) sections in construction has become widespread due to their favorable attributes, including their lightweight properties, high strength, recyclability, and ease of assembly. To ensure their continued safe and efficient utilization, this review provides a comprehensive investigation into the factors influencing the strength of CFS members. This analysis encompasses design codes, prediction methodologies, material properties, and various structural configurations. This review uncovers discrepancies among existing design codes, particularly noting conservative predictions in AISI and AS/NZS standards for composite and built-up sections. Additionally, the effectiveness of prediction methods such as the direct strength method and effective width method varies based on specific structural configurations and loading conditions. Furthermore, this review delves into recent advancements aimed at enhancing fire resistance, connection design, and the composite behavior of CFS structures. The influence of factors such as eccentricity, sheathing materials, and bolt spacing on structural performance is also examined. This study underscores the crucial role of accurate prediction methods and robust design standards in ensuring the structural integrity and safety of CFS constructions. Through a comparative analysis, it is revealed that AISI and AS/NZS standards exhibit conservatism in predicting nominal buckling loads compared to experimental data. Conversely, a non-linear finite element analysis demonstrates a strong correlation with laboratory tests, offering a more accurate prediction of nominal buckling capacity. Overall, this review offers comprehensive insights aimed at optimizing CFS structural design practices. By identifying key areas for future research and development, this work contributes to the ongoing advancement of safe and efficient CFS construction applications.

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Section: The Influence Of Sheathing and Benefits In Cfs Constructionmentioning

confidence: 99%

Investigating the Factors Influencing the Strength of Cold-Formed Steel (CFS) Sections

Hussein,

Hussein

2024

Buildings

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CFRP strengthening of web perforated CFS lipped channel short columns: An experimental study

Vivek,

Baskar,

Asha

2024

Structures

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CFRP Strengthening of Web Perforated CFS Lipped Channel Short Columns: An Experimental Study

2023

Preprint

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Axial compression tests on cold-formed steel (CFS) web perforated lipped channels strengthened with carbon fiber reinforced polymer (CFRP) were reported in this paper. The primary aim of this study was to experimentally investigate the influence of CFRP strengthening on the stability, axial strength and stiffness of the CFS web perforated lipped channel short columns (of 600 mm length) subjected to monotonic axial compression. A total of 20specimens provided with circular perforation at the mid-height and at centre of the web, were tested by adopting different CFRP skin-strengthening configurations. Both uni-directional CFRP (CF_UD) and bi-directional CFRP (CF_BD) laminates were considered. The axial behaviour of the specimens was evaluated in terms of failure mode, peak axial strength and the axial load-deformation response. All the test specimens reported in this study failed due to local-distortional interactive buckling at the location of web perforation. A significant improvement in the axial capacity along with delayed failure was noted in certain CFRP strengthening configurations resulting in an enhanced structural performance. The structural response of specimens with different CFRP strengthening configurations was explained in detail. Finally, it was concluded that use of CF_UD and CF_ UD / BD were found to be more beneficial for the cases of single and double layer of CFRP respectively.

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Strengthening of web perforated CFS lipped channel columns with CFRP: a numerical study

Cited by 3 publications

References 40 publications

Investigating the Factors Influencing the Strength of Cold-Formed Steel (CFS) Sections

Investigating the Factors Influencing the Strength of Cold-Formed Steel (CFS) Sections

CFRP strengthening of web perforated CFS lipped channel short columns: An experimental study

CFRP Strengthening of Web Perforated CFS Lipped Channel Short Columns: An Experimental Study

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