Research Article Open Access

Advanced XFEM Simulation of Pull-out and Debonding of Steel Bars and FRP-Reinforcements in Concrete Beams

Nicola Orlando1 and Elena Benvenuti1
  • 1 University of Ferrara, Italy
American Journal of Engineering and Applied Sciences
Volume 9 No. 3, 2016, 746-754

DOI: https://doi.org/10.3844/ajeassp.2016.746.754

Submitted On: 12 September 2016 Published On: 6 October 2016

How to Cite: Orlando, N. & Benvenuti, E. (2016). Advanced XFEM Simulation of Pull-out and Debonding of Steel Bars and FRP-Reinforcements in Concrete Beams. American Journal of Engineering and Applied Sciences, 9(3), 746-754. https://doi.org/10.3844/ajeassp.2016.746.754

Abstract

An innovative three-dimensional model is applied to the pull-out of steel bars and the debonding of FRP plates from concrete specimens. The shearing and opening modes at the interface of debonding is fully captured. The model is based on an innovative variant of the regularized eXtended Finite Element Method (XFEM) developed by the authors. In this method, the displacement discontinuity at the debonding surface is regularized and an internal length parameter is introduced. Besides smoothing the debonding, the regularized XFEM is particularly suitable for modelling steel fiber reinforced beams.

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Keywords

  • Pull-Out
  • Debonding
  • XFEM
  • Bending Test
  • 3D
  • Mixed-Mode