We present an effective three-dimensional tool for modeling the influence on the structural behavior of the mechanical behavior of the interface between steel bars and FRP plates glued to concrete beams. The proposed tool reproduces the pull out of the bars and the detachment of the FRP plates. Both opening and sliding of the interface between reinforcements and beam are accounted for. The tool is based on the regularized extended finite element method (XFEM) developed by the authors: the discontinuities are regularized and a mechanically consistent variational formulation is adopted. The considered cases range from the simulation of pull-out tests of steel rebars, to the simulation of single-lap tests in shear and three point bending tests in FRP-reinforced concrete beams.
EFFECTIVE 3D REGULARIZED XFEM FOR PULL-OUT OF STEEL BARS IN CONCRETE, BENDING AND SHEAR TESTS ON FRP-REINFORCED CONCRETE BEAMS
BENVENUTI, Elena;ORLANDO, Nicola
2016
Abstract
We present an effective three-dimensional tool for modeling the influence on the structural behavior of the mechanical behavior of the interface between steel bars and FRP plates glued to concrete beams. The proposed tool reproduces the pull out of the bars and the detachment of the FRP plates. Both opening and sliding of the interface between reinforcements and beam are accounted for. The tool is based on the regularized extended finite element method (XFEM) developed by the authors: the discontinuities are regularized and a mechanically consistent variational formulation is adopted. The considered cases range from the simulation of pull-out tests of steel rebars, to the simulation of single-lap tests in shear and three point bending tests in FRP-reinforced concrete beams.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.