With regards to the Near Surface-Mounted Retrofit method using FRP in reinforced concrete flexural members, uniform deformation occurs as a whole in de-bonded FRP in the case of partial bonding at both ends and de-bonding in the central part. This leads to relief of rapid increase of the deformation at a particular position in the case of full bonding, which is effective in relieving brittle failure phenomena. In this manner, the analytical method to describe the flexural behavior of reinforced concrete beams strengthened with Near Surface-Mounted FRP strips is studied in this paper by making recourse to the analytical approach. Especially in order to improve the structural deformation capacity, the character- istics of anchorage part and de-bonded part were taken into account in the analysis conducted with respect to the beam with partially de-bonded FRP in the central part. In this regard, an effective method for flexural analysis of the partially de-bonded FRP strip is proposed in the present study by reflecting the bond behavior of NSM FRP strip in the flexural model based on the stress transfer mechanism between NSM FRP strip and concrete.
Flexural analysis of RC beam strengthened by partially de-bonded NSM FRP strip
FEO, Luciano
2016-01-01
Abstract
With regards to the Near Surface-Mounted Retrofit method using FRP in reinforced concrete flexural members, uniform deformation occurs as a whole in de-bonded FRP in the case of partial bonding at both ends and de-bonding in the central part. This leads to relief of rapid increase of the deformation at a particular position in the case of full bonding, which is effective in relieving brittle failure phenomena. In this manner, the analytical method to describe the flexural behavior of reinforced concrete beams strengthened with Near Surface-Mounted FRP strips is studied in this paper by making recourse to the analytical approach. Especially in order to improve the structural deformation capacity, the character- istics of anchorage part and de-bonded part were taken into account in the analysis conducted with respect to the beam with partially de-bonded FRP in the central part. In this regard, an effective method for flexural analysis of the partially de-bonded FRP strip is proposed in the present study by reflecting the bond behavior of NSM FRP strip in the flexural model based on the stress transfer mechanism between NSM FRP strip and concrete.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
