Behaviour of RC beams with a fibre-reinforced polymer (FRP)-strengthened web opening

A review on the behaviour of reinforced concrete beams with fibre-reinforced polymer-strengthened web openings

“…A total of 24 experimental studies on the behaviour of RC beams with an FRP-strengthened web opening have been found in the published literature (Abdalla et al, 2003; Abdel-Kareem 2014; Aksoylu et al, 2020; Allam, 2005; Allawi et al, 2020; Almusallam et al, 2018; Arabzadeh and Karimizadeh, 2019; Chin et al, 2012, 2016; Elsanadedy et al, 2019; Hemzah et al, 2020; Hussain and Pimanmas, 2015; Lu et al, 2015; Maaddawy and Ariss, 2012; Maaddawy and Sherif, 2009; Makki et al, 2019; Mansur et al, 1999; Nie et al, 2018, 2020a; Osman et al, 2017b; Pimanmas, 2010; Rahim et al, 2020; Salih et al, 2020; Teng et al, 2013b). The first of these studies was conducted by Mansur et al (1999), in which three RC T-section beams were tested with only one parameter examined (i.e.…”

“…the remaining components of the beam above and below the web opening) (e.g. Nie et al, 2020a), as shown in Figure 1(a). The failure of some specimens tested by Almusallam et al (2018), Hemzah et al (2020) and Salih et al (2020) was dominated by the crushing of compressive concrete at the mid-span of the beam, which belongs to a flexural failure mode [as shown in Figure 1(b)].…”

“…Maaddawy and Ariss, 2012), as shown in Figure 2(a); while the others exhibited a flexural failure mode due to the crushing of compressive concrete at the mid-span of the beam (e.g. Aksoylu et al, 2020) [as shown in Figure 2(b)] or the formation of four plastic hinges at the two ends of the top and bottom chords (Nie et al 2018, 2020a) [as shown in Figure 2(c)]. 4 A web opening/web openings reduced significantly both the load-carrying capacity and stiffness of the beam; after FRP-strengthening, the weakening effect of the web opening can be substantially compensated.…”

“…It should be noted that the web opening created in the beam can not only serve as passage of utility ducts/pipes but also have other functions. Nie et al (2018, 2020a) used the web opening to reduce the flexural capacity of the beam end, in order to enforce the strong column-weak beam requirement in existing RC frames which violate such a requirement. For more details, the reader can refer to Nie et al (2018, 2020a).…”

“…Nie et al (2018, 2020a) used the web opening to reduce the flexural capacity of the beam end, in order to enforce the strong column-weak beam requirement in existing RC frames which violate such a requirement. For more details, the reader can refer to Nie et al (2018, 2020a).…”