Nonlinear modelling and finite element analysis on the load-bearing capacity of RC beams with considering the bond–slip effect
Journal of Engineering, Design and Technology
ISSN: 1726-0531
Article publication date: 20 August 2021
Issue publication date: 4 July 2023
Abstract
Purpose
This paper aims to present nonlinear numerical simulations using the versatile finite element (FE) analysis tool ANSYS and theoretical analysis based on code provisions to assess the load-carrying capacity of reinforced concrete (RC) beams under two-point monotonic static loadings.
Design/methodology/approach
Four quarter-size FE models with load and geometry symmetry conditions were constructed, the load-bearing capacity and associated mid-span deflections at critical points are verified against the full-scale experimental RC beams available in the literature. These developed FE models incorporated the tension stiffening effects and bond–slip behaviour. Theoretical analyses based on Indian standard code IS: 456–2000 and ACI 318–19 were also carried to verify the experimental and numerical predicted moments at critical loading points.
Findings
The load-deflection curves predicted through FE models exhibit closer corroboration with the experimental curves throughout the loading history. The contour plots for deflections, concrete principal stresses, reinforcement yield stresses are satisfactorily predicted by the FE models, which reveal the complete information of nonlinear behaviour of RC beams. The developed model well captured the initial and progressive crack patterns at each load increments.
Practical implications
The FE modelling is an efficient, valid and economical tool that is an alternative to the expensive experimental program and can be used to explore, analyse and fully understand the nonlinear response of RC beams under static loadings.
Originality/value
The ultimate moment capacity evaluated based on ACI 318–19 code provision show a better correlation with the experimental data as compared to the IS: 456–2000 code provision. The ultimate loads and associated centre-span deflections predicted by RN-2, RN-3, RB-12 and RB-16 FE model show a discrepancy of 1.66 and –0.49%, –4.68 and –0.60%, –9.38 and –14.53% and –4.37 and 4.21%, respectively, against the experimental results, which reveals that the developed ANSYS FE models predict consistent results and achieved a reasonable agreement with the experimental data.
Keywords
Acknowledgements
The authors thank the management of MVGR engineering college (Autonomous) and JNTUK university for their support and encouragement towards the collaborative research.
Conflict of interest: There is no conflict of interest with anybody concerning this work.
Ethical statement: The authors declare that this work is original work done by them and has not been submitted to any journal.
Funding body: No external funding was received.
Replication of results section: All results have been presented in the manuscript in a format that enables easy reproduction.
Citation
, P., Ponnada, M.R. and Geddada, Y. (2023), "Nonlinear modelling and finite element analysis on the load-bearing capacity of RC beams with considering the bond–slip effect", Journal of Engineering, Design and Technology, Vol. 21 No. 4, pp. 945-972. https://doi.org/10.1108/JEDT-06-2021-0310
Publisher
:Emerald Publishing Limited
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