Numerical Simulation of the Behavior of Reinforced UHPFRC Ties Considering Effects of Tension Stiffening and Shrinkage
[EN] Highlights What are the main findings? The developed non-linear finite element model (NLFEM) enables reliable prediction of shrinkage strain range in reinforced UHPFRC ties. The NLFEM reliably reproduces the tension-stiffening behavior of reinforced UHPFRC ties using average parameters derived...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:dnet:riunet______::4a30dec1836c3eb7036b1b7d78e6f541 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/234572 |
| Access Level: | acceso abierto |
| Palabra clave: | Ultra-high-performance fiber-reinforced concrete Finite element modeling Reinforced UHPFRC tensile elements Tensile bars UHPFRC shrinkage range Mechanical tensile response Tensile parameters |
| Sumario: | [EN] Highlights What are the main findings? The developed non-linear finite element model (NLFEM) enables reliable prediction of shrinkage strain range in reinforced UHPFRC ties. The NLFEM reliably reproduces the tension-stiffening behavior of reinforced UHPFRC ties using average parameters derived from a simplified four-point-inverse analysis (4P-IA) method. What is the implication of the main findings? This study aims to develop a reliable and direct design procedure for UHPFRC, ensuring consistency from material characterization to structural application. Shrinkage effects are crucial and must be addressed in the design of reinforced UHPFRC elements under serviceability conditions.Highlights What are the main findings? The developed non-linear finite element model (NLFEM) enables reliable prediction of shrinkage strain range in reinforced UHPFRC ties. The NLFEM reliably reproduces the tension-stiffening behavior of reinforced UHPFRC ties using average parameters derived from a simplified four-point-inverse analysis (4P-IA) method. What is the implication of the main findings? This study aims to develop a reliable and direct design procedure for UHPFRC, ensuring consistency from material characterization to structural application. Shrinkage effects are crucial and must be addressed in the design of reinforced UHPFRC elements under serviceability conditions.Abstract This study presents a reliable methodology for analyzing reinforced ultra-high-performance fiber-reinforced concrete (UHPFRC) elements by linking material behavior to structural performance. A non-linear finite element model (NLFEM) is proposed to simulate the tensile response of reinforced UHPFRC elements, with particular emphasis on shrinkage effects. The model operates in two phases: the first simulates shrinkage during specimen storage and the second simulates the mechanical tensile test, using the internal stresses from the first phase as initial conditions. The model was validated through an experimental program involving reinforced UHPFRC ties. The NLFEM accurately reproduced the load-displacement response using average UHPFRC tensile parameters obtained from a simplified Four-Point bending test Inverse Analysis method (4P-IA). It reliably predicted the shrinkage strain range and its impact on stiffness loss during microcrack initiation and stabilization, where tension-stiffening behavior is critical. Additionally, the simulation from the model captured the transition from microcracking to macrocrack formation and the role of fiber bridging in maintaining stiffness. The predicted shrinkage strain aligns with values reported in the literature and represents a conservative upper bound, neglecting the potential effects of creep and relaxation. Overall, the NLFEM effectively simulates the full tension-stiffening behavior of reinforced UHPFRC, including three-dimensional effects, and provides a reliable tool for structural analysis and design. |
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