Shear Behavior of RC Beams with Corroded Stirrups Strengthened Using FRP Laminates: Effect of the Shear Span-to-Depth Ratio

Li, Weiwen; Huang, Zeqi; Huang, Zhiyuan; Xu, Yang; Shi, Tiansheng; Xing, Feng

doi:10.1061/(asce)cc.1943-5614.0001042

Cited by 15 publications

(2 citation statements)

References 34 publications

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“…Yang J. et al [ 29 ] investigated the feasibility of using externally bonded FRP laminates combined with U-jackets, applied directly and without repairing the deteriorated concrete cover, to strengthen beams with corroded reinforcing rebars. The shear span-to-depth ratio can significantly influence the behavior of an RC beam shear strengthened with EBR–FRP composites and can even determine the shear failure mode of RC beams [ 30 ]. Chen et al [ 31 ] proposed ultra-high-performance concrete (UHPC) combined with fiber-reinforced polymer (FRP) composites for the shear strengthening of corroded reinforced concrete beams.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Corroded Concrete Beams Strengthened with Carbon Fiber-Reinforced Polymer

Wang

2023

Materials

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The present study investigates the flexural behavior of reinforced concrete (RC) beams; the longitudinal reinforcing rebars of the beams were corroded and then strengthened with carbon fiber-reinforced polymer (CFRP). The corrosion of the longitudinal tension reinforcing rebars in eleven beam specimens was accelerated in order to obtain different corrosion levels. Afterwards, the beam specimens were strengthened by bonding one layer of CFRP sheets to the tension side to restore the strength loss due to the corrosion. The failure modes, flexural capacity, and midspan deflection of the specimens with different corrosion levels of the longitudinal tension reinforcing rebars were obtained by the four-point bending test. It was found that the flexural capacity of the beam specimens decreased with the increase in the corrosion level of the longitudinal tension reinforcing rebars and that the relative flexural strength was only 52.5% when the corrosion level was 25.6%. The stiffness of the beam specimens decreased significantly when the corrosion level was higher than 20%. Through a regression analysis of the test results, a model for the flexural bearing capacity of the corroded RC beams strengthened with CFRP was proposed in the study.

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Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Corroded Concrete Beams Strengthened with Carbon Fiber-Reinforced Polymer

Wang

2023

Materials

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“…Fiber-reinforced polymer (FRP) is widely accepted as an excellent material in structural strengthening and retrofitting because of its high strength-to-weight ratio, good corrosion resistance, and ease of installation (Teng et al, 2002, Teng et al, 2012Baji et al, 2016;Nie et al, 2020;Zhou et al, 2020a). Externally bonded (EB) FRP technique was used for flexural and shear strengthening (Bencardino et al, 2005;Bencardino et al, 2006;Chen et al, 2018;Benzeguir et al, 2020;Chen et al, 2020;Li et al, 2020). Generally, FRP laminates are used for flexural strengthening, and transverse FRP sheets are used for shear strengthening.…”

Section: Introductionmentioning

confidence: 99%

Behaviors of Large-Rupture-Strain Fiber-Reinforced Polymer Strengthened Reinforced Concrete Beams Under Static and Impact Loads

Zhao

Sui

et al. 2020

Front. Mater.

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Reinforced concrete (RC) structures may be damaged seriously when subjected to impact loading, and it is necessary to strengthen existing structures to improve their impact resistance. Large-rupture-strain fiber-reinforced polymer (LRS-FRP) is a promising material to strengthen RC structures under impact because of its good deformation capacity. This article shows experimental studies on performance of LRS-FRP strengthened RC beams under static and impact loads. The effects of FRP types, loading rate, and the usage or nonusage of end-anchorages on the strengthening efficiency were investigated. The experiment demonstrates LRS-FRP laminate with end-anchorage (EA) to be an appropriate strengthening technique for RC beams under both static and impact loading. The beams strengthened with end-anchored LRS-FRP presented greater ductility than their carbon fiber-reinforced polymer counterpart under static loading, and the end-anchored LRS-FRP strengthening system reduced the maximum deflection and damage of strengthened beam under impact significantly. However, the end-anchorage was more susceptible to damage and failure when the loading rate increased from static to impact. Therefore, the endanchorage and the end-anchorage-FRP connection should be designed with caution for impact condition.

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Strengthening of reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated with custom-designed mortar and fabrics

Ramezani,

Esfahani,

Sabzi

2023

Front. Struct. Civ. Eng.

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Shear Behavior of RC Beams with Corroded Stirrups Strengthened Using FRP Laminates: Effect of the Shear Span-to-Depth Ratio

Cited by 15 publications

References 34 publications

Flexural Behavior of Corroded Concrete Beams Strengthened with Carbon Fiber-Reinforced Polymer

Flexural Behavior of Corroded Concrete Beams Strengthened with Carbon Fiber-Reinforced Polymer

Behaviors of Large-Rupture-Strain Fiber-Reinforced Polymer Strengthened Reinforced Concrete Beams Under Static and Impact Loads

Strengthening of reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated with custom-designed mortar and fabrics

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