کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
258781 | 503622 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Simulation of concrete cover separation failure in FRP plated RC beams Simulation of concrete cover separation failure in FRP plated RC beams](/preview/png/258781.png)
The flexural strength of a reinforced concrete beam can be increased by bonding a FRP sheet to the tension face. Nevertheless, this type of reinforcement may cause a premature debonding failure. This paper is concerned with the failure by concrete cover separation; in other words by peeling-off. Four series of FRP plated RC beams and one group of control beams were tested in a four-point bending setup where each group consisted of three beams. All strengthened beams failed by peeling-off. As a part of this study numerical analyses using the commercial program; Abaqus have been carried out in order to predict this type of failure. Comparisons between the predictions of the numerical model and test results show a very good agreement indicating that the ultimate load, the beam behavior and the failure mode can be closely predicted by using the proposed model.
► This study presents test results of 12 FRP strengthened RC beams and 3 control beams.
► Strengthened beams exhibited higher load capacity, lower ductility than reference beams.
► All strengthened beams failed by concrete cover separation which is a brittle failure.
► Numerical results also predict peeling-off failure for all strengthened beams.
► The thicker the FRP sheets, the higher the stiffness is and the lower the load capacity is.
Journal: Construction and Building Materials - Volume 37, December 2012, Pages 791–800