Shear strengthening of RC beams with corrosion-damaged stirrups using FRP grid-reinforced ECC matrix composites

Zheng, Aohan; Li, Shan; Zhang, Dengfeng; Yan, Yunhui

doi:10.1016/j.compstruct.2021.114229

Cited by 43 publications

(6 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This transition occurs due to changes in the internal force transmission within the beam. Consequently, the influence of material strength on the shear capacity of the beam also changes [ 22 , 23 ].…”

Section: Test Results and Analysismentioning

confidence: 99%

Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement

Cheng,

Du,

Wang

et al. 2023

Materials

View full text Add to dashboard Cite

Background: Shear damage of beams is typically brittle damage that is significantly more detrimental than flexural damage. Purpose: Based on the super-high toughness and good crack control ability of engineered cementitious composites (ECC), the shear performance of concrete–ECC beams was investigated by replacing a portion of the concrete in the tensile zone of reinforced concrete beams with ECC and employing high-strength reinforcing bars to design concrete–ECC beams. The purpose of this investigation is to elucidate and clarify the shear performance of concrete–ECC beams. Methodology/approach: Experimental and FE analyses were conducted on the shear performance of 36 webless reinforced concrete–ECC composite beams with varied concrete strengths, shear-to-span ratios, ECC thicknesses, and interfacial treatments between the layers. Results: The results indicate that the effect of the shear-to-span ratio is greater, the effect of the form of interface treatment is smaller, the effect is weakened after the ECC thickness is greater than 70 mm (i.e., the ratio of the replacement height to section height is approximately 0.35), the shear resistance is reduced when the hoop rate is greater, and the best shear resistance is obtained when the ECC 70 mm thickness and the hoop rate of 0.29% are used together. Conclusions: This study can serve as a technical reference for enhancing the problems of low durability and inadequate fracture control performance of RC beams in shear and as a guide for structural design research.

show abstract

Section: Test Results and Analysismentioning

confidence: 99%

Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement

Cheng,

Du,

Wang

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…Schematic of FRP composites applied to deteriorate concrete beams [19]. Aohan Zheng et al [20] conducted an experimental examination of the shear behavior of RC beams reinforced with an engineered-cementitious-composite. (ECC) matrix comprised of fiber-reinforced polymer (FRP) grid and stirrups impacted by corrosion.…”

Section: Figurementioning

confidence: 99%

Repairing and strengthening techniques of RC beams: a review

Hassan,

Latief

2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The purpose of this review is to present the techniques for strengthening or repairing of reinforced concrete-beams (RC). The concrete members, like RC beam are might be required to be strengthened to increase the internal strength capacity to resist additional external loads or repaired to increase the design’s structural rigidity and insulate the reinforcement from aggressive conditions. The experimental studies that related to the techniques of repairing and strengthening of RC beams using: external steel plates, fiber reinforced concrete (FRC), reinforced concrete (RC) jacketing, sprayed fiber reinforced polymer FRP, epoxy injection, mortar jackets, near-surface carbon fiber (SNSM-CFRP) strips, near-surface glass fiber (NSM-GFRP) rods, CFRP laminate and sheet; and adding an ultra high performance concrete (UHPC) layer. All the techniques that were discussed showed that there is an improvement in the general behavior of the beams that have been strengthened and repaired, as well as an increase in the maximum load and ductility.

show abstract

“…It could be observed that considerable efforts were made to study the seismic behavior of corrosion damaged structural components. Zheng et al (2021) investigated the bearing capacity of the corroded concrete volume of the stirrup under different corrosion degrees. Moodi et al (2020) studied the influence of corroded stirrups on the bonding effect between reinforcing steel and concrete in the tied region was discussed.…”

Section: Seismic Behavior Of Rc Beams 77mentioning

confidence: 99%

“…It could be observed that considerable efforts were made to study the seismic behavior of corrosion damaged structural components. Zheng et al . (2021) investigated the bearing capacity of the corroded concrete volume of the stirrup under different corrosion degrees.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on seismic behavior of RC beams confined by corroded stirrups

Shu,

Lu,

Liang

2023

IJSI

View full text Add to dashboard Cite

PurposeTo understand the seismic behavior of reinforced concrete (RC) beams confined by corroded stirrups, low-reversed cyclic loading tests were carried out on seven RC beam specimens with different stirrup corrosion levels and stirrup ratios to investigate their mechanical characteristics.Design/methodology/approachThe failure mode, hysteresis behavior, skeleton curves, ductility, stiffness degradation and energy dissipation behavior of RC specimens are compared and discussed. The experimental results showed that the restraint of concrete provided by corroded stirrups is reduced, which leads to a decline in seismic performance.FindingsFor the specimens with the same ratios of stirrup, as the corrosion level increased, the load-carrying capacity, stiffness, plastic deformation capacity and energy-dissipation capacity dropped significantly. Compared with the uncorroded specimen, the failure modes of specimens with high corrosion level changed from ductile bending failure to brittle failure. For the specimens with the same levels of corrosion, the higher the stirrup ratio was, the stronger the restraint effect of the stirrups on the concrete, and the seismic behavior of the specimens was obviously improved.Originality/valueIn this paper, a total of seven full-size RC beam specimens at joints with different stirrup corrosion levels and stirrup ratios were designed and constructed to explore the influences of corrosion levels and stirrup ratios of stirrups on the seismic performances. The failure modes, strain of reinforcement, hysteretic curves, skeleton curves, stiffness degradation and ductility factor of RC specimens are compared and discussed.

show abstract

Shear strengthening of RC beams with corrosion-damaged stirrups using FRP grid-reinforced ECC matrix composites

Cited by 43 publications

References 52 publications

Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement

Experimental Study of the Shear Performance of Combined Concrete–ECC Beams without Web Reinforcement

Repairing and strengthening techniques of RC beams: a review

Experimental study on seismic behavior of RC beams confined by corroded stirrups

Contact Info

Product

Resources

About