Structural behaviour of RC beams externally strengthened in flexure with SRG and SRP systems

3D FE Analysis of RC Beams Externally Strengthened with SRG/SRP Systems

“…The 3D FE model has been defined and used to analyze the behavior of five prototypes tested at the "Laboratory of Materials and Structural Testing" of the University of Calabria [12,13].…”

“…These systems are capable of ensuring the same advantages of FRP strengthening systems, in terms of easiness of application, low invasiveness, and reduced intervention time, but with a lower cost, better fire resistance, and a higher compatibility with existing structures, compared to FRP materials [9,10]. The properties and potential applications of these new materials have been analyzed in some experimental investigations [11][12][13][14][15][16][17][18][19][20][21][22], but few of the studies are concerning the numerical modeling of structural elements strengthened with them [23]. In order to carry out analytical and numerical (FE) analyses of SRG/SRP strengthened RC members specific analytical tools [24] and bond-slip models [23], should be used, respectively.…”

Reliability and adaptability of the analytical models proposed for the FRP systems to the Steel Reinforced Polymer and Steel Reinforced Grout strengthening systems

“…(a) Bencardino and Condello [13] analyzed the results obtained from an experimental investigation carried out on four RC beams strengthened to flexure by using SRG and SRP systems and tested under four-point bending. Test parameters included the use or not of external U-wrap end anchorages to prevent delamination premature failure of the longitudinal sheet.…”

“…The experimental data details are shown in Table 1, where for each experimental work are given: prototype name, test mode, geometric dimension of the prototype, type of external reinforcement and matrix, ratio (b f /b c ) between the width of the external reinforcement (b f ) and the width of the beam (b c ), number of external reinforcement plies and anchorage systems. More details of the experimental tests can be found in the original works [12,13,16,20,22]. …”

“…In general, it was observed [13,16,22] that the addition of the external reinforcement (SRG or SRP), increases the flexural strength, greatly reducing the ductility of the strengthened beam, compared to the un-strengthened beam. With reference to the beams in Table 1, these results are shown in Fig.…”