Author/Authors :
Mosto nejad Davood نويسنده is a Professor at Civil Engineering Department in Isfahan University of Technology , Hosseini Saied Jalil نويسنده PhD candidate in Structural Engineering at Department of Civil Engineering in the Isfahan University of Technology, Isfahan, Iran.
Abstract :
Reinforced Concrete (RC) beams strengthened with Fiber Reinforced Polymer
(FRP) sheets may fail due to Debonding failure. In such cases, the FRP sheet is detached
from the RC beam before real damages are
infiicted on the beam. In this paper, a procedure
is developed based on smeared cracks approach for simulating the Debonding process in
FRP strengthened RC beams within the framework of finite element. For this purpose,
the challenges facing the simulation of Debonding mechanism are initially studied, and
a method is proposed in a second stage of combating these problems using the cohesive
elements available in the ABAQUS software. The validity of the proposed method is then
tested by modeling four beams from those reported in the literature and by comparing
the results with the experimental ones. Given the acceptable agreement observed between
the experimental and numerical simulation results, the method is claimed to be valid and
practicable. In a later section of the present paper, the proposed method will be used to
investigate the effects of length and width of the strengthening sheet on beamʹs behavior
and its failure mechanism. The results of the present study reveal that longer FRP sheets
increase load carrying capacity and mid-span displacement of strengthened RC beams.
