Structural Engineering International· 2026Q2
Finite Element Modelling of CFRP-prestressed Structural Concrete
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- Q2SCImago
- 2026year
Short summary
A new Finite Element framework accurately models CFRP-prestressed concrete structures using layered Reissner-Mindlin shell elements and advanced material nonlinearity models (Tension Chord Model, Cracked Membrane Model).
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Abstract
This paper introduces a Finite Element framework for modelling reinforced and CFRP-prestressed concrete structures. A standalone Finite Element solver employing layered Reissner-Mindlin shell elements tailored for reinforced concrete applications is introduced and verified. Material nonlinearities – introduced by the implemented mechanical model based on the Tension Chord Model and the Cracked Membrane Model – are solved with Newton–Raphson iterations based on complex-step derivatives of the element stresses. The presented Finite Element framework is verified against three experimental campaigns covering (i) hyperstatic slab strips with hybrid steel/CFRP reinforcement, (ii) CFRP-prestressed T-beams, and (iii) a full-scale CFRP-prestressed railway bridge prototype. Good agreement between experimental results and model predictions is achieved in terms of (i) load-deformation behaviour, (ii) reinforcement stresses, (iii) crack widths, and (iv) failure analysis, where the latter is subject to assumptions regarding the representative failure volume.
The authors' abstract, as published at the source. Structural Engineering International, 2026 · DOI ↗
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