Effectiveness of SHCC strips reinforced with glass fiber textile mesh layers for shear strengthening of RC beams: Experimental and numerical assessments

Baraghith, Ahmed T.; Mansour, Walid; Behiry, Reda N.; Fayed, Sabry

doi:10.1016/j.conbuildmat.2022.127036

Cited by 30 publications

(5 citation statements)

References 45 publications

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“…The earlier research reported in References 5–10 concluded that EB‐FRP enhanced the shear and flexural capacity of RC beams. Nawaz et al 12 studied one control and two shear‐deficient self‐compacted concrete beams internally reinforced with GFRP bars that were strengthened in shear with CFRP strips.…”

Section: Introductionmentioning

confidence: 85%

“…Externally bonded (EB) FRP or near‐surface mounted (NSM) FRP can be used to apply FRP reinforcement to upgrade concrete element capacity 2–4 . Previous experiments were performed on reinforced concrete (RC) beams upgraded with FRP plates bonded to their outside surfaces 5–8 . Engineered cementitious composites (ECC), stainless steel plates (SSPs), textile‐reinforced concrete (TRC), and U‐wrapping TRC are other techniques to strengthen RC beams in shear 9–11 .…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4] Previous experiments were performed on reinforced concrete (RC) beams upgraded with FRP plates bonded to their outside surfaces. [5][6][7][8] Engineered cementitious composites (ECC), stainless steel plates (SSPs), textilereinforced concrete (TRC), and U-wrapping TRC are other techniques to strengthen RC beams in shear. [9][10][11] Using ECC and SSPs as shear strengthening for the RC beams could enhance their shear capacity by 36%-97%.…”

Section: Introductionmentioning

confidence: 99%

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Shear performance of reinforced concrete beams strengthened in shear using NSM bars and reinforced HSC layers

Abdo

Sharaky

Ahmed

2023

Structural Concrete

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The reinforced concrete (RC) beams could be upgraded in shear using steel and fiber‐reinforced polymer (FRP) having several shapes (bars, strips, or sheets). Using near‐surface mounted (NSM) Glass FRP (GFRP) bars is still limited compared to carbon FRP (CFRP) elements as shear reinforcement. Moreover, using reinforced high‐strength concrete layers (HSCL) as NSM shear strengthening for the RC beams is still limited. Herein, three RC beams internally reinforced in shear using different shear areas (without, 100 mm stirrups apart, and 200 mm stirrups apart) were experimentally tested as reference beams (CB). Other eight beams strengthened in shear using NSM HSCL, and bars were experimentally tested. Moreover, an extended finite element (FE) simulation was implemented through a verified FE model to study the effect of other NSM aspects on shear‐strengthened beam response. The results explained that, regardless of the internal stirrups area and external NSM characteristics, the shear‐strengthened beams showed higher load efficiency than the corresponding CB. The NSM upgraded shear beam had slightly higher load efficiency than the un‐strengthened beam having the same steel area as internally shear stirrups. Moreover, increasing the internal shear stirrups decreased the total efficiency of the NSM shear strengthening and the internal stirrups regardless of the NSM characteristics. Furthermore, the NSM HSCL was more efficient than the corresponding NSM bars in increasing the load capacity and stiffness of the shear‐strengthened beams. The reported analytical model predicted well the shear capacity of the tested beams.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shear performance of reinforced concrete beams strengthened in shear using NSM bars and reinforced HSC layers

Abdo

Sharaky

Ahmed

2023

Structural Concrete

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“…According to the findings, an increase in compressive strength was seen in the range of 4.6 to 39% for basalt fibre mesh and from 6.5 to 50% for glass fibre mesh. According to research by Baraghith et al [ 20 ] the increases in shear capacity and ductility of reinforced RC beams made with intermittent glass fibre textile mesh layers and strain-hardening cementitious composite strips were in the range of 47 to 142% and 21 to172%, respectively. The cracking load was postponed, and the ultimate shear capacity and the ductility index rose when the number of glass fibre textile mesh layers contained inside strain-hardening cementitious composite strips increased.…”

Section: Introductionmentioning

confidence: 99%

Impact Strength of Preplaced Aggregate Concrete Comprising Glass Fibre Mesh and Steel Fibres: Experiments and Modeling

Ponnambalam¹,

Thangavel²,

Murali

et al. 2022

Materials

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Concrete is the most widely used and most affordable construction material. The structural damage that concrete cracks and fractures may cause can be severe. These concerns have lately been alleviated by new developments in fibre concretes. Recent advancements in fibrous concrete and its evolution have been rapidly drawing researchers’ attentions worldwide, which motivates the development of a new type of composite with superior impact resistance. Preplaced aggregate fibrous concrete (PAFC) is a revolutionary composite comprising a higher dosage of fibres. It has outstanding impact resistance that surpasses those of traditional fibrous concrete. The impact behaviour of PAFC in addition to glass fibre mesh (GFM) has not been investigated thoroughly. To fill this research gap, this study investigates the impact performance of three-layered PAFC comprising steel fibres and GFM insertion. Eight different mixtures were prepared and can be divided into two groups. In the first group, specimens were made with 4% fibres and two single, double and triple layers of GFM insertion between the three-layered concrete. The second group of specimens was reinforced with 5, 2 and 5% steel fibres at the top, middle and bottom layers, respectively. However, the GFM insertion scheme for the second group was the same as the first. Rectangular specimens of size 500 × 100 × 100 mm were cast and tested against drop weight impact. The parameters studied were cracking impact numbers, failure impact number, ductility index and failure patterns. In addition, an analytical model was used to evaluate the impact failure energies. Results indicate that the combined action of steel fibre and GFM exhibited an excellent impact resistance. Increasing the number of GFM insertions between the specimen layer led to increased impact strength. The dose of the fibres utilized in the outer layer of the PAFC was increased, resulting in the material having a higher impact resistance. The cracking impact numbers improved from 28 to 40%, and failure impact numbers ranged from 58.8 to 92.2% when the GFM insertion numbers increased from one to three.

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“…Fayed et al [18] investigated the behaviour of 3D constructions that included BCCs. The behaviour of structural components was examined in studies [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Seismic Resistance of RC Corner Eccentric Beam-Column Sub-assemblages

Fayed

asran

EL-Esnawi

et al. 2022

Journal of Engineering Research

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An experimental investigation studied performance of Scorner beam-column connection (BCC) under cyclic loading. Each BCC consisted of upper, lower column and two beams; one of them was free end (A) while the other was fixed end (B). The cyclic loading was applied on the end of beam (A) while the beam (B) was unloaded and subjected to torsion stresses due to fixation. Two variables were investigated. The first is the eccentricity of the beam about column edge while the second is the effect of stirrup joint configuration on BCC under cyclic loading. All BCCs were tested under reversible fourteen cycles. The vertical displacement at the free end of the beam (A), horizontal sway at mid height of the column, crack and ultimate loads were observed in details at each cycle. The findings noticed that the increase of stirrup length in the connection decreased the deflection at the same level of the load. The ultimate load of specimen, which was shifted by 25mm, was less than the ultimate load of specimen, without shift, by 24%.When the joint stirrup was extended outside the column core by 50 mm in specimen Sp2, the capacity of the connection increased.

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Effectiveness of SHCC strips reinforced with glass fiber textile mesh layers for shear strengthening of RC beams: Experimental and numerical assessments

Cited by 30 publications

References 45 publications

Shear performance of reinforced concrete beams strengthened in shear using NSM bars and reinforced HSC layers

Shear performance of reinforced concrete beams strengthened in shear using NSM bars and reinforced HSC layers

Impact Strength of Preplaced Aggregate Concrete Comprising Glass Fibre Mesh and Steel Fibres: Experiments and Modeling

Seismic Resistance of RC Corner Eccentric Beam-Column Sub-assemblages

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