Enhancing the flexural performance of lightweight reinforced concrete beams exposed to elevated temperatures

Alshannag, Mohammad; Alshenawy, Abdulhafiz O.

doi:10.1016/j.asej.2020.12.020

Cited by 9 publications

(6 citation statements)

References 14 publications

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“…Several studies investigated the potential use of FRP technique in repairing head damaged RC structures (Alshannag and Alshenawy, 2021;Haddad et al, 2011;Xu et al, 2019;Ashteyat et al, 2020;Roy et al, 2016;Jadooe et al, 2017;Obaidat et al, , 2021b. Alshannag and Alshenawy (2021) studied the flexural behavior of light weight reinforced concrete beam damaged by heat and repaired using FRP sheet. Forty RC beams were cast, heated at 6008C for 3 h. The flexural behavior of the beams investigated including the ultimate load, stiffness, deflection and cracking pattern.…”

Section: Jsfe 133mentioning

confidence: 99%

“…, 2012; Yuan and Xinsheng Xu, 2017; Al-Zaid et al. , 2015; Alshannag and Alshenawy, 2021). Toutanji et al.…”

Section: Introductionmentioning

confidence: 99%

“…, 2020, 2021b). Alshannag and Alshenawy (2021) studied the flexural behavior of light weight reinforced concrete beam damaged by heat and repaired using FRP sheet. Forty RC beams were cast, heated at 600°C for 3 h. The flexural behavior of the beams investigated including the ultimate load, stiffness, deflection and cracking pattern.…”

Section: Introductionmentioning

confidence: 99%

“…Several experimental programs have been conducted worldwide to study the efficiency of FRP sheet in strengthening and repairing defected beams (Toutanji et al, 2006;Takeda et al, 1996;Bsisu et al, 2015;Xiong et al, 2004;Wu et al, 2002Wu et al, , 2006Wu et al, , 2007Balamuralikrishnan and Jeyasehar, 2009;Chellapandian et al, 2019;Attari et al, 2012;Yuan and Xinsheng Xu, 2017;Al-Zaid et al, 2015;Alshannag and Alshenawy, 2021). Toutanji et al (2006) developed an experimental program consisting of eight rectangular, normal weight concrete beams, with dimensions of (160 3 108 3 1,800) mm, and tested them using four-point loading.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies investigated the potential use of FRP technique in repairing head damaged RC structures (Alshannag and Alshenawy, 2021; Haddad et al. , 2011; Xu et al.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and analytical investigation of using externally bonded, hybrid, fiber-reinforced polymers to repair and strengthen heated, damaged RC beams in flexure

Rjoub

Obaidat

Ashteyat

et al. 2021

JSFE

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PurposeThis study aims to conduct an experimental study and finite element model (FEM) to investigate the flexural behavior of heat-damaged beams strengthened/repaired by hybrid fiber-reinforced polymers (HFRP).Design/methodology/approachTwo groups of beams of (150 × 250 × 1,200) mm were cast, strengthened and repaired using different configurations of HFRP and tested under four-point loadings. The first group was kept at room temperature, while the second group was exposed to a temperature of 400°C.FindingsIt was found that using multiple layers of carbon fiber-reinforced polymer (CFRP) and glass fiber-reinforced polymer (GFRP) enhanced the strength more than a single layer. Also, the order of two layers of FRP showed no effect on flexural behavior of beams. Using a three-layer scheme (attaching the GFRP first and followed by two layers of CFRP) exhibited increase in ultimate load more than the scheme attached by CFRP first. Furthermore, the scheme HGC (heated beam repaired with glass and carbon, in sequence) allowed to achieve residual flexural capacity of specimen exposed to 400°C. Typical flexural failure was observed in control and heat-damaged beams, whereas the strengthened/repaired beams failed by cover separation and FRP debonding, however, specimen repaired with two layers of GFRP failed by FRP rupture. The FEM results showed good agreement with experimental results.Originality/valueFew researchers have studied the effects of HFRP on strengthening and repair of heated, damaged reinforced concrete (RC) beams. This paper investigates, both experimentally and analytically, the performance of externally strengthened and repaired RC beams, in flexure, with different FRP configurations of CFRP and GFRP.

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Section: Jsfe 133mentioning

confidence: 99%

“…, 2012; Yuan and Xinsheng Xu, 2017; Al-Zaid et al. , 2015; Alshannag and Alshenawy, 2021). Toutanji et al.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Several studies investigated the potential use of FRP technique in repairing head damaged RC structures (Alshannag and Alshenawy, 2021; Haddad et al. , 2011; Xu et al.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations