Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Computers and Concrete Volume 23, Number 1, January 2019 , pages 11-23 DOI: https://doi.org/10.12989/cac.2019.23.1.011 |
|
|
|
Validation of a non-linear hinge model for tensile behavior of UHPFRC using a Finite Element Model |
||
Eduardo J. Mezquida-Alcaraz, Juan Navarro-Gregori, Juan Ángel Lopez and Pedro Serna-Ros
|
||
| Abstract | ||
| Nowadays, the characterization of Ultra-High Performance Fiber-Reinforced Concrete (UHPFRC) tensile behavior still remains a challenge for researchers. For this purpose, a simplified closed-form non-linear hinge model based on the Third Point Bending Test (ThirdPBT) was developed by the authors. This model has been used as the basis of a simplified inverse analysis methodology to derive the tensile material properties from load-deflection response obtained from ThirdPBT experimental tests. In this paper, a non-linear finite element model (FEM) is presented with the objective of validate the closedform non-linear hinge model. The state determination of the closed-form model is straightforward, which facilitates further inverse analysis methodologies to derive the tensile properties of UHPFRC. The accuracy of the closed-form non-linear hinge model is validated by a robust non-linear FEM analysis and a set of 15 Third-Point Bending tests with variable depths and a constant slenderness ratio of 4.5. The numerical validation shows excellent results in terms of load-deflection response, bending curvatures and average longitudinal strains when resorting to the discrete crack approach. | ||
| Key Words | ||
| finite element model; numerical validation; ultra-high performance fiber-reinforced concrete; closed-form non-linear hinge model; third point bending test; smeared cracking approach; discrete cracking approach | ||
| Address | ||
| Eduardo J. Mezquida-Alcaraz, Juan Navarro-Gregori, Juan Ángel Lopez and Pedro Serna-Ros: Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de Valencia, Camino de Vera s/n, 46022, Valencia, Spain | ||