Experimental evaluation of shear behavior of pultruded GFRP perforated connectors embedded in concrete

Shear Performance Assessment of Sand-Coated GFRP Perforated Connectors Embedded in Concrete

“…With the knowledge of the failure process as shown in Figure 14, two points are understood about SCGPC specimens of embedment length 150–200 mm, (i) the bond failure is prior to the GFRP shear failure; and (ii) the plate’s failure pattern is the same as that of GPC. According to previous research [26], for the plate shear failure of GPC, there is a critical plate thickness t cr . When the plate is thinner than t cr , the plate tends to appear shear failure, on the contrary, GPC turns up concrete dowel failure.…”

“…When the plate is thinner than t cr , the plate tends to appear shear failure, on the contrary, GPC turns up concrete dowel failure. According to the prediction in [26], plate thickness of GPC with the same dimension should be at least 10 mm to meet the requirement of t cr , therefore, 6 mm thickness is thinner than t cr . In other word, the plate’s failure pattern of SCGPC fits the theory of shear failure of GPC.…”

“…Three 150 mm edge concrete blocks for compression test were poured and cured in moisture environment for 28 days. The material properties of concrete were tested in accordance with Chinese code GB50010-2010 and a cube strength of 50.9 MPa was reported by the authors [26]. In addition, the elastic modulus and yield strength of the steel rebars were 2.05 × 10 5 MPa and 430.4 MPa, respectively [26].…”

“…The pull-out specimens were divided into two groups. The first group included two sand-coated GFRP plates; the second group included three types of GPC [26]. As shown in Figure 1b, the bonding interface between the GFRP plate and concrete was first filtered by manual sandpaper.…”

“…In terms of GFRP perforated connectors (GPC) embedded in concrete, push/pull-out tests have been reported. Based on the experimental findings, Cho et al [24] proposed a strength equation on the basis of discrete spring model; Zou et al [25] proposed a strength equation on the basis of the Oguejiofor and Hosain Model; and the authors [26] proposed a strength equation considering the effect of stress concentration of GFRP hole.…”