Behavior of eccentrically loaded high strength concrete columns jacketed with FRP laminates

Performance evaluation of intermittently CFRP wrapped square and circularised square reinforced concrete columns under different loading conditions

“…The failure of Specimens SI-15, SI-25, CI-15 and CI-25 started with the cracking of the concrete cover in the non-wrapped region on the compression side at the mid-height and was governed by the rupture of the CFRP strip on the compression side at the mid-height of the specimens. The rupture of CFRP strip of Specimen SI-15 occurred at one of the corners, which was consistent with the observation in previous studies (Hassan, et al, 2017;Saljoughian and Mostofinejad, 2016b). Whereas, the rupture of the CFRP strip of Specimens CI-15 and CI-25 occurred at random positions.…”

“…In order to maximize the confinement effect of the intermittent wrapping, the confinement generated by CFRP strips and steel ties (Barros and Ferreira, 2008;Triantafyllou, et al, 2015). The width of the CFRP strips was also chosen to be the same as the clear spacing based on the available experimental studies on intermittent wrapping (Barros and Ferreira, 2008;Colomb, et al, 2008;Hassan, et al, 2017;Mostofinejad, et al, 2015;Mostofinejad, 2016a, 2016b). Accordingly, the width and clear spacing of the CFRP strips for the specimens of Group SI were 40 mm, which were equal to half of the centre-to-centre spacing of the steel ties.…”

“…Wu and Zhou, 2010). Several studies were carried out to investigate the behaviour of intermittently FRP wrapped columns (Barros and Ferreira, 2008;Colomb, Tobbi, Ferrier, & Hamelin, 2008;Dong, Wang, & Guan, 2013;Hassan, Hodhod, Hilal, & Bahnasaway, 2017;Hodhod, Hassan, Hilal, & Bahnasawy, 2005;Maaddawy, 2009;Mai, Sheikh, & Hadi, 2018;Park, Na, Chung, & Feng, 2008;Pham, Hadi, & Youssef, 2015;Triantafyllou, Rousakis, & Karabinis, 2015). Intermittent wrapping has attracted research attention in recent years due to its advantageous features over full wrapping.…”

Retrofitting of reinforced concrete columns using near-surface-mounted steel rebars and fiber-reinforced polymer straps under eccentric loading

“…EB FRP composites have widely been used to enhance the ductility capacity by increasing concrete confinement (Abd El Fattah, 2018; Al-Nimry and Soman, 2018; Bai et al, 2017; Campione et al, 2018; De Luca et al, 2011; Fanaradell et al, 2019; Haji et al, 2019; Hassan et al, 2017; Moretti and Arvanitopoulos, 2018; Teng et al, 2009; Teng and Lam, 2004; Toutanji et al, 2010; Zeng et al, 2017, 2018), flexural strength by orienting fibers longitudinally (Hasan et al, 2016; Mostofinejad and Torabian, 2015; Rey Castillo et al, 2018, 2019; Siddika et al, 2019; Torabian and Mostofinejad, 2017), or both (Fitzwilliam and Bisby, 2010; Hadi, 2007; Quiertant and Clement, 2011; Rey Castillo et al, 2018; Sadeghian et al, 2010; Siddiqui et al, 2014). While EB FRP composites can significantly resist tensile forces, their compressive strength is highly susceptible to fiber micro and overall buckling of FRP (ACI Committee 440.2R, 2017; Khorramian and Sadeghian, 2019).…”

Investigation on the behaviour of partial wrapping in comparison with full wrapping of square RC columns under different loading conditions

“…Most of the available research studies investigated the performance of fully FRP wrapped columns [5,8,10,[15][16][17][18][19][20][21][22]. However, only a few studies investigated the behaviour of partially FRP wrapped cylinders and prisms [23][24][25][26][27] and RC columns [28][29][30][31][32][33][34][35][36][37][38][39][40]. It was reported that partial FRP wrapping improved the strength and ductility of the RC columns [28][29][30][31][32][33][34][35][36][37][38].…”