Time-dependent numerical modelling of conventional and geopolymer concrete beams serviceability

Dong, Y; Li, J; Nejadi, S; Xu, T; Castel, A

Time-dependent numerical modelling of conventional and geopolymer concrete beams serviceability

Dong, Y Li, J

Nejadi, S

Xu, T Castel, A

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Journal of Building Engineering, 2026, 118
Issue Date:: 2026-01-15

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Field	Value	Language
dc.contributor.author	Dong, Y
dc.contributor.author	Li, J https://orcid.org/0000-0003-2457-1994
dc.contributor.author	Nejadi, S https://orcid.org/0000-0002-3913-5872
dc.contributor.author	Xu, T
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.date.accessioned	2026-11-05T05:43:16Z
dc.date.available	2026-11-05T05:43:16Z
dc.date.issued	2026-01-15
dc.identifier.citation	Journal of Building Engineering, 2026, 118
dc.identifier.issn	2352-7102
dc.identifier.issn	2352-7102
dc.identifier.uri	http://hdl.handle.net/10453/197315
dc.description.abstract	Controlling deflection in reinforced concrete structures is essential for ensuring serviceability and long-term performance. This study presents a numerical approach to simulate the effects of short-term and long-term service loading on reinforced concrete flexural members, validated against data from experimental investigations conducted at the UNSW Australia including conventional concrete and heat-cured low calcium fly ash geopolymer concrete. The creep coefficient and shrinkage of concrete were calibrated using MATLAB's nonlinear fitting function. AS3600-2018 standard creep and shrinkage models were used for conventional concrete beams. Experimental creep and shrinkage data were used for the geopolymer concrete beam. A three-dimensional finite element analysis (FEA) model was developed in ABAQUS, incorporating creep and shrinkage effects through user subroutines (USDFLD, UEXPAN, and GETVRM) within the concrete damage plasticity (CDP) framework. The model was employed to analyze the short-term deflection after cracking, time-dependent deflection under sustained loading, and long-term stiffness degradation of reinforced concrete beams. The numerical results were successful compared to the experimental results obtained on conventional and geopolymer concrete beams, demonstrating the accuracy and effectiveness of the proposed approach.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	SMARTCRETE CRC LTDCRC Smartcrete
dc.relation	Kembla Watertech Pty Ltd
dc.relation	Kembla Watertech Pty Ltd
dc.relation.ispartof	Journal of Building Engineering
dc.relation.isbasedon	10.1016/j.jobe.2025.114971
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0905 Civil Engineering, 1201 Architecture, 1202 Building
dc.subject.classification	3302 Building
dc.subject.classification	4005 Civil engineering
dc.title	Time-dependent numerical modelling of conventional and geopolymer concrete beams serviceability
dc.type	Journal Article
utslib.citation.volume	118
utslib.for	0905 Civil Engineering
utslib.for	1201 Architecture
utslib.for	1202 Building
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil, Environmental & Sociotechnical Engineering
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Built Infrastructure Resilience (CBIR)
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2026-11-05T05:43:14Z
pubs.publication-status	Published
pubs.volume	118

Abstract:

Controlling deflection in reinforced concrete structures is essential for ensuring serviceability and long-term performance. This study presents a numerical approach to simulate the effects of short-term and long-term service loading on reinforced concrete flexural members, validated against data from experimental investigations conducted at the UNSW Australia including conventional concrete and heat-cured low calcium fly ash geopolymer concrete. The creep coefficient and shrinkage of concrete were calibrated using MATLAB's nonlinear fitting function. AS3600-2018 standard creep and shrinkage models were used for conventional concrete beams. Experimental creep and shrinkage data were used for the geopolymer concrete beam. A three-dimensional finite element analysis (FEA) model was developed in ABAQUS, incorporating creep and shrinkage effects through user subroutines (USDFLD, UEXPAN, and GETVRM) within the concrete damage plasticity (CDP) framework. The model was employed to analyze the short-term deflection after cracking, time-dependent deflection under sustained loading, and long-term stiffness degradation of reinforced concrete beams. The numerical results were successful compared to the experimental results obtained on conventional and geopolymer concrete beams, demonstrating the accuracy and effectiveness of the proposed approach.

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http://hdl.handle.net/10453/197315