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Research Article

Nonlinear coupled thermal-structural analysis of precast concrete beam-to-column connections at high temperatures

Noor Azim Mohd. Radzi, Muhaimim Kamal, Shareen Azuha, Nur Izzatie Aqilah Mansor, Roszilah Hamid

Department of Civil Engineering, Universiti Kebangsaan Malaysia, Selangor D. E., Malaysia



Finite element analysis;

Fire resistance;

Beam-to-column connections;

Thermal response

This paper presents a nonlinear coupled thermal-structural analysis using ANSYS Workbench to determine precast beam-to-column connections' thermal and structural behaviour. Three precast connection models, a concrete corbel, a concrete nib, and an inverted E steel nib, are exposed to ambient and cellulose fire curves. Firstly, the precast connection models are verified based on the previous experimental result at ambient temperature. Then, the verified precast connection models are exposed to the cellulose fire curve for two hours before being loaded to failure. The results are compared with the recent experimental fire test conducted by the authors. Based on the result, finite element models at ambient temperature were validated with a percentage difference of less than 10%. However, finite element models at high temperatures were not verified due to the percentage difference exceeding 10 %. The significant difference was due to the non-uniformity of sample dimensions and different test setups in the previous experiment. Finite element models for concrete corbel and inverted E steel nib have a higher stiffness than the experimental sample. However, the finite element model for concrete nib has a lower stiffness than the experimental sample. Concrete nib recorded the most significant thermal percentage deterioration (32.1 % and 57.4 %) compared to concrete corbel (22.4 % and 11.52 %) and inverted E steel nib (26.9 % and 27.9 %). The validation result of nonlinear coupled thermal-structural analysis executed using ANSYS Workbench gives good efficiency for predicting the fire performance of precast concrete corbel beam-to-column connections at high temperatures.

© 2023 MIM Research Group. All rights reserved.


01/01/2024 Best Paper Award: The winners of 2023 Best Paper Award of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Author Awards section.

01/01/2024 Most Cited Paper Award: The winners of 2023 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Author Awards section.

01/01/2024 Reviewer Awards: The winners of 2023 reviewer awards of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Reviewer Awards section.

8/12/2023 Special Issue: Embark on a journey of innovation with the journal of Research on Engineering Structures and Materials as we unveil a compelling opportunity for contributors in our upcoming special issue, "Design, Analysis, and Manufacturing of Composite Vehicle Structures." Led by distinguished Guest Editors Liubov Gavva and Oleg Mitrofanov from Moscow Aviation Institute. For more info see the link.

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2023 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.

2023 Best Paper Award:

The paper authored by Ferzan Fidan, Naim Aslan, Mümin Mehmet Koç entitled as “Morpho-structural and compressive mechanical properties of graphene oxide reinforced hydroxyapatite scaffolds for bone tissue applications” is awarded.

2023 Most Cited Paper Award:

The paper authored by Ercan Işık, Ehsan Harirchian, Hüseyin Bilgin, Kirti Jadhav entitled as “The effect of material strength and discontinuity in RC structures according to different site-specific design spectra" is awarded.


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