Equivalent temperature prediction for concrete-filled cold-formed steel (CF-CFS) built-up column sections (part A)

Rahnavard, Rohola; Craveiro, Hélder D.; Simões, Rui; Santiago, Aldina

doi:10.1016/j.csite.2022.101928

Cited by 19 publications

(13 citation statements)

References 12 publications

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“…The discussion on the application and design procedure for the CF-CFS built-up section is available in Ref. [28]. In this study, the cold-formed steel profiles, including C, and U-shaped, were considered for the built-up sections, as shown in Fig.…”

Section: Description Of the Cf-cfs Built-up Sectionsmentioning

confidence: 99%

“…All CF-CFS built-up composite sections explained in Section 2 were modeled using the finite element method software Abaqus [30]. The modeling techniques were calibrated against experimental results conducted by Rahnavard et al [16] and are detailed in Part A of this study [28]. DC2D4 element type with a size of 0.5 was selected according to the calibration available in Ref.…”

Section: Modeling Assumptionsmentioning

confidence: 99%

“…DC2D4 element type with a size of 0.5 was selected according to the calibration available in Ref. [28]. However, it should be mentioned that the mesh size doesn't significantly affect the results.…”

Section: Modeling Assumptionsmentioning

confidence: 99%

“…However, it should be mentioned that the mesh size doesn't significantly affect the results. The heat conductance for the contacts between concrete and steel was assumed as 200 W/m 2 K [16,28]]. For the case of steel to steel contacts, the value 2000 W/m 2 K was considered.…”

Section: Modeling Assumptionsmentioning

confidence: 99%

“…Additionally, a precise definition is necessary to achieve an accurate result. The authors presented a 2D finite element approach in Part A [28] of the current study and calibrated it using the available experimental data presented in Ref. [16].…”

Section: Introductionmentioning

confidence: 99%

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Equivalent Temperature Prediction for Concrete-Filled Cold-Formed Steel (Cf-Cfs) Built-Up Column Sections (Part B)

Rahnavard¹,

Craveiro²,

Simões³

et al. 2022

SSRN Journal

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Section: Description Of the Cf-cfs Built-up Sectionsmentioning

confidence: 99%

Section: Modeling Assumptionsmentioning

confidence: 99%

Section: Modeling Assumptionsmentioning

confidence: 99%

Section: Modeling Assumptionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Equivalent Temperature Prediction for Concrete-Filled Cold-Formed Steel (Cf-Cfs) Built-Up Column Sections (Part B)

Rahnavard¹,

Craveiro²,

Simões³

et al. 2022

SSRN Journal

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New fire resistance design approach for concrete‐filled cold‐formed steel (CF‐CFS) built‐up composite column

Rahnavard,

Craveiro,

Simões

2023

ce papers

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Prior research investigated the fire resistance prediction of the concrete‐filled cold‐formed steel (CF‐CFS) built‐up columns when subjected to axial compression and high temperatures. However, a complex heat transfer analysis is needed to calculate the temperature development of the steel and concrete components of the composite cross‐section to predict the fire resistance of a composite column, as provided in EN1994‐1‐2. In order to estimate equivalent temperatures for the steel and concrete used in CF‐CFS built‐up column sections, this research provides a series of empirical formulae. A two‐dimensional heat transfer analysis calibrates a finite element model to estimate temperature across the CF‐CFS built‐up column sections. The concrete infill was simplified by separating into an inner and outer core. The empirical formulas' accuracy was assessed by comparing them with 2D heat transfer analysis results. Finally, the fire resistance of a CF‐CFS column was obtained using numerical simulation and compared with the analytical prediction following EN 1994‐1‐2 incorporated with the current empirical formulation. The results showed a high accuracy of the empirical formulation to determine the equivalent temperatures of the steel and concrete core components.

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Built‐up Cold‐formed Steel‐lightweight Concrete (Cfs‐lwc) Composite Beams Subjected to Elevated Temperatures

Rahnavard,

Craveiro,

Simões

et al. 2024

ce papers

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Cold‐formed steel (CFS) products are extremely versatile and can be used in multiple applications. Recent experiments tests by the authors have shown that mobilising composite action within systems comprising cold‐formed steel beams and lightweight concrete is feasible and can lead to substantial improvements in structural performance. However, their behaviour subjected to elevated temperatures has yet to be investigated; this is, therefore, the focus of the present study. The results of two tests on CFS‐LWC beams at ambient and elevated temperatures are reported. A numerical modelling study using fire dynamics simulator (FDS) software is then described in which the temperature development was successfully replicated.

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Equivalent temperature prediction for concrete-filled cold-formed steel (CF-CFS) built-up column sections (part A)

Cited by 19 publications

References 12 publications

Equivalent Temperature Prediction for Concrete-Filled Cold-Formed Steel (Cf-Cfs) Built-Up Column Sections (Part B)

Equivalent Temperature Prediction for Concrete-Filled Cold-Formed Steel (Cf-Cfs) Built-Up Column Sections (Part B)

New fire resistance design approach for concrete‐filled cold‐formed steel (CF‐CFS) built‐up composite column

Built‐up Cold‐formed Steel‐lightweight Concrete (Cfs‐lwc) Composite Beams Subjected to Elevated Temperatures

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