Development of lightweight CFS composite built-up beams: Tests and flexural response

Dar, M. Adil; Ghowsi, Ahmad Fayeq; Dar, A.R.; Salam, S.; Anbarasu, M.; Vivek, K.S.; Hajirasouliha, Iman

doi:10.1016/j.jcsr.2023.108041

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…The investigation involved the fabrication of built-up beams made of lightweight CFS composite using glass fiber-reinforced polymer (GFRP) boards and timber (see Figure 7). The results demonstrated a substantial increase in both the stiffness and flexural strength, by 80% and 150%, respectively, when compared to the unstiffened CFS-built-up beams [43]. It has been observed that augmenting the floor beams' steel thickness and reducing the spacing between floorboards and beam screws can potentially enhance the flexural load-carrying capability of the floor system with no deformability [119].…”

Section: Enhanced Performance Of Cfs Composite Systemsmentioning

confidence: 95%

“…The incorporation of wood and glass fiber-reinforced polymer (GFRP) boards has notably enhanced the CFS composite beams' stiffness and strength, facilitating the attainment of yield moment capacity [43]. Particularly, GFRP boards have outperformed wood boards in enhancing sectional compactness.…”

Section: The Influence Of Sheathing and Benefits In Cfs Constructionmentioning

confidence: 99%

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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: Enhanced Performance Of Cfs Composite Systemsmentioning

confidence: 95%

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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“…A similar work was further extended to the flexural strengthening of unsymmetrical built-up channel sections 29 , 30 . Studies 31 – 33 on the use of FRP boards for strengthening CFS composite built-up columns and beams were also available, which reported a significant enhancement in the structural performance in comparison to bare steel specimens. Recently, several advanced studies in the field of CFS construction were reported 34 – 36 .…”

Section: Introductionmentioning

confidence: 99%

Axial compression tests on CFRP strengthened CFS plain angle short columns

Vivek,

Dar,

Ali

et al. 2024

Sci Rep

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A comprehensive test program was performed to experimentally investigate the effect of CFRP strengthening on the axial strength and stability of CFS plain angle short columns subjected to monotonic axial compression. A total of 28 specimens were tested by varying the CFRP strengthening configurations for different column heights. Both uni-directional (CF_UD) and bi-directional (CF_BD) CFRP were considered. The influence of various parameters such as the type of CFRP, fiber orientation, and number of CFRP layers was investigated and discussed in detail. For single layer (ply) of CFRP, CF_UD-0° strengthening configuration resulted in maximum increase of axial capacity by 58.33% and 45.72% (in comparison to bare steel specimens), corresponding to 0.5 m and 1.0 m column lengths respectively. All the bare steel and skin-strengthened specimens failed predominantly due to torsional–flexural buckling mode. Additional layer of CFRP wrapping was found to enhance the axial capacity further and CF_UD-0°/BD was found to possess greater capacity in the case of double layer of CFRP. Adopting cardboard in-fill in addition to CF_UD-0° wrap has prevented the torsional mode of buckling and resulted in a peak increase of axial capacity by 192.55% and 240.61% corresponding to 500 mm and 100 mm long specimens, respectively.

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Flexural design of cold-formed steel built-up sections failing by local buckling: Development of generalised direct strength method

Maizi,

Hadidane,

Dar

2024

Engineering Structures

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Development of lightweight CFS composite built-up beams: Tests and flexural response

Cited by 6 publications

References 34 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

Axial compression tests on CFRP strengthened CFS plain angle short columns

Flexural design of cold-formed steel built-up sections failing by local buckling: Development of generalised direct strength method

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