Different FRCM systems for shear-strengthening of reinforced concrete beams

Younis, Adel; Ebead, Usama; Shrestha, Kshitij C.

doi:10.1016/j.conbuildmat.2017.07.132

Cited by 92 publications

(28 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several experimental studies have demonstrated the efficiency of TRM and PBO-FRCM jacketing at improving the response of shear critical beams (TRM [24][25][26][27][28][29][30][31][32], PBO-FRCM [33][34][35][36][37]. Regardless of the adopted textile architecture, the number of layers and the jacket configuration, FRCM jackets have been proved quite efficient in increasing the shear capacity of deficient beams and in some cases activating flexural yielding.…”

Section: Introductionmentioning

confidence: 99%

Steel-Reinforced Grout (SRG) strengthening of shear-critical RC beams

Thermou

Papanikolaou

Lioupis

et al. 2019

Construction and Building Materials

View full text Add to dashboard Cite

This paper investigates the effectiveness of Steel-Reinforced Grout (SRG) jackets to strengthen shear critical reinforced concrete (RC) beams. Eleven RC beams were tested in three-point bending. Key parameters of investigation were the strengthening configuration (Uand fully-wrapped jackets), the density of the fabric (1.57 and 4.72 cords/cm) and the number of the strengthening layers (one and two). The test results demonstrated the efficiency of SRG jacketing in increasing both strength (up to 160%) and deformation capacity (up to 450%) of the shear critical beams. Expressions are proposed for estimating the effective strain of the SRG jacket.

show abstract

Section: Introductionmentioning

confidence: 99%

Steel-Reinforced Grout (SRG) strengthening of shear-critical RC beams

Thermou

Papanikolaou

Lioupis

et al. 2019

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…This leads to confirm the importance of the strengthening process [2]- [4]. Several strengthening materials have been used for stretching such as fiber-reinforced polymer (FRP) composites, fabric-reinforced cementitious matrix (FRCM) [5]- [14], and steelreinforced grout (SRG) [10], [11], [15]- [18].…”

Section: Introductionmentioning

confidence: 59%

Interaction between Internal and External Shear Reinforcement for Strengthened RC Deep Beams

Ibrahim¹,

Aborahmeh²,

Ebead³

2021

International Conference on Civil, Structural and Transportation Engineering

Self Cite

View full text Add to dashboard Cite

This paper presents a comprehensive experimental work to study the interaction between the internal and external shear reinforcement for strengthened reinforced concrete (RC) deep beams. For this purpose, a total of twelve medium-scale RC deep beams have been designed, fabricated, and loaded monotonically till a completed failure. Four beams were kept unstrengthened to act as reference beams, while others have been strengthened using hybrid carbon-glass Fiber-reinforced polymer (FRP) strips. All beams have been designed to be shear deficient in one side, which will be called herein as a critical shear span (CSS). The study included three test parameters: strengthening technique (externally bonded and near-surface mounted), number of internal and external shear reinforcement (two and three) in the CSS, and the alignment of the internal and external shear reinforcement (aligned and unaligned) to each other. The results revealed that the near-surface mounted (NSM) technique could be able to mitigate the premature debonding mode of failure which was dominant with the beams strengthened by the externally bonded (EB) counterpart. The NSM technique could be able to increase the shear capacity of the strengthened beams up to 45% compared to the corresponding technique. The results also showed that the unaligned configuration of the internal and external shear reinforcement was better than the aligned one for both NSM and EB techniques.

show abstract

“…Numerous experimental campaigns were conducted in the last 15 years to investigate the contribution of externally bonded FRCMs and campaigns were conducted in the last 15 years to investigate the contribution of externally bonded FRCMs and SRGs to the load-carrying capacity of concrete and masonry members. These studies showed an increase in the bending [6][7][8], shear [9][10][11], and axial capacity [12][13][14] of FRCM/SRGstrengthened reinforced concrete (RC) members that are comparable with the counterparts strengthened with FRPs. Analogously, FRCMs and SRGs were proven to be effective to increase the in-plane and out-of-plane strength of masonry walls (see Figure 1a,b, respectively) [15][16][17], axial strength of masonry columns [18][19][20], and the load-carrying capacity of masonry arches [21,22].…”

Section: Introductionmentioning

confidence: 99%

Some Key Aspects in the Mechanics of Stress Transfer Between SRG and Masonry

2020

View full text Add to dashboard Cite

The use of composite materials to strengthen masonry structures has become common practice within the civil engineering community. Steel-reinforced grout (SRG), which comprises high-strength steel fibers embedded in a mortar matrix, is part of the family of the fiber-reinforced cementitious matrix (FRCM) composites that represent a suitable alternative to fiber-reinforced polymer (FRP) composites for strengthening existing structures. Although studies on FRCMs have already reached a certain level of maturity, some key issues remain open, such as the role of matrix type and layout, substrate properties, and test rate. This paper focuses on some of these issues. The results of single-lap direct shear tests on masonry blocks strengthened with SRGs are presented to analyze the bond behavior between the composite material and the substrate. Four aspects are considered: (1) the change in the width of the SRG mortar matrix while keeping the width of the fiber sheet fixed; (2) the type of mortar used for the SRG; (3) the influence of the test rate, and (4) the type of substrate (i.e., concrete vs. masonry). The results obtained indicate the active role of the matrix layout and the importance of the test rate, encouraging further investigations to clarify these aspects.

show abstract

Different FRCM systems for shear-strengthening of reinforced concrete beams

Cited by 92 publications

References 30 publications

Steel-Reinforced Grout (SRG) strengthening of shear-critical RC beams

Steel-Reinforced Grout (SRG) strengthening of shear-critical RC beams

Interaction between Internal and External Shear Reinforcement for Strengthened RC Deep Beams

Some Key Aspects in the Mechanics of Stress Transfer Between SRG and Masonry

Contact Info

Product

Resources

About