The present contribution addresses the simulation of three-point bending tests carried out on FRP-plated Steel Fiber Reinforced Concrete (SFRC) beams by means a regularized variant of the eXtended Finite Element Method (XFEM). The proposed procedure is able to capture the real crack pattern and failure of FRP-strengthened SFRC beams. In particular, the mixed mode nature of the FRP-detachment is taken into account through the adoption of a mechanism-based procedure, while the fiber bridging effect exerted by the steel fibers is correctly modeled by means of simple constitutive relationships and parameters of clear physical meaning. The obtained results are fully consistent with the experimental da.
Accurate XFEM simulation of failure and debonding of FRP-plate-reinforced beams of steel fiber reinforced concrete
BENVENUTI, Elena;ORLANDO, Nicola
2017
Abstract
The present contribution addresses the simulation of three-point bending tests carried out on FRP-plated Steel Fiber Reinforced Concrete (SFRC) beams by means a regularized variant of the eXtended Finite Element Method (XFEM). The proposed procedure is able to capture the real crack pattern and failure of FRP-strengthened SFRC beams. In particular, the mixed mode nature of the FRP-detachment is taken into account through the adoption of a mechanism-based procedure, while the fiber bridging effect exerted by the steel fibers is correctly modeled by means of simple constitutive relationships and parameters of clear physical meaning. The obtained results are fully consistent with the experimental da.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
