Strengthening of RC Beams Using SCC Jacket Consisting of Glass Fiber and Fiber-Silica Fume Composite Gel

Mohsenzadeh, Sajjad; Maleki, A.; Lotfollahi-Yaghin,

doi:10.5829/ije.2021.34.08b.14

Cited by 4 publications

(6 citation statements)

References 37 publications

(54 reference statements)

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“…Due to the importance of shear failure in reinforced concrete members which is happened suddenly without warning, Alferjani et al [11] and Abdollahi et al [12] presented the experimental and analytical studies for reinforced concrete members to evaluate the shear capacity. Rahmani et al [13], Faez et al [14] and Mohsenzadeh et al [15] studied the reinforced concrete beams strengthening due to the importance of this topic.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study to Predict a New Formula for Calculating the Deflection in Wide Concrete Beams Reinforced with Shear Steel Plates

Mohammed

Al-Zuheriy

Abdulkareem³

2023

IJE

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A conventional stirrup is widely used in all concrete beams as shear reinforcement to prevent shear failure that happens suddenly and unexpectedly without previous warning. It is a great challenge to figure out another type of stirrup and establish a new formula to calculate the deflection. This article offers an experimental study that predicts a novel formula for calculating deflection in concrete beams reinforced with shear steel plates as a stirrup. The experimental work was established and consists of 16 wide reinforced concrete beams with 216x560x1800 mm dimensions. Instead of the conventional reinforcing stirrups, steel plates with 3.0, 4.0, and 5.0 mm thickness in longitudinal and transverse dimensions and for one-half of the samples, recycled PVC round bubbles were used as the variables explored in this study. In addition, the variables include an examination of the opening form of shear steel plates with varying distances between them. For calculating the deflection of wide beams, a new formula for the effective moment of inertia is proposed, and it yields excellent agreement for several investigations, with a coefficient of variation of 5.48 percent. The formulae for calculating the maximum deflection are established using ACI 318M-14 and EC 2.

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Section: Introductionmentioning

confidence: 99%

An Experimental Study to Predict a New Formula for Calculating the Deflection in Wide Concrete Beams Reinforced with Shear Steel Plates

Mohammed

Al-Zuheriy

Abdulkareem³

2023

IJE

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“…Researchers have considered the strengthening of RC beams in recent years [9][10][11][12]. Attar et al [13] investigated the strengthened RC beams with self-compacting concrete (SCC) jackets containing fibers.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that RC jackets containing aluminum nanoparticles, depending on the thickness jacket, the number of rebars used in the jackets, and the length of the beam span, have increased the flexural strength by 155 to 447% [11]. Mohsenzadeh et al [12] investigated the strengthened RC beams using SCC jacket containing glass fiber and fibrous silica fume gel (FSFG). Concrete jackets containing glass fiber and FSCG, depending on the amount of glass fiber, have increased the energy absorption capacity of the beams by about 89 to 463%.…”

Section: Introductionmentioning

confidence: 99%

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Strengthening of RC Beams using Steel Plate-Fiber Concrete Composite Jackets (Finite Element Simulation and Experimental Investigation)

Shadmand

Hedayatnasab

Kohnehpooshi

2022

IJE

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In this research, steel plate-fiber concrete composite jackets (SPFCJ) was used to strengthen the RC beams. The accuracy of the analysis method was evaluated by modeling RC beams fabricated in the laboratory, and a good agreement was observed. Variables in the finite element method (FEM) analysis include the strength class of concrete used in the main beam (15,20, and 25 MPa), the beam length (1.4 and 2.8 m), the type of jackets (RC jacket, SPFCJ, and CFRP sheet), and jacket thickness (40, 60 and 80 mm). SPFCJ is effective for all three concrete grades and increased the energy absorption capacity by 1.88, 2.07, and 2.25 times, respectively. The bearing capacity of the strengthened beam with 60 mm composite jackets increased by 79 and 20% more than the values corresponding to jackets with 40 and 80 mm thickness. The jacket thickness parameter significantly influences the response of strengthened beams with the proposed composite jackets. Depending on the dimensions and geometric characteristics of the beam, the appropriate thickness for the jacket should be considered, and increasing the thickness can not always improve the beam bearing capacity.

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“…They showed that the proposed method could increase the shear capacity of the damaged beam by about 27%. Mohsenzadeh et al [9] evaluated the behavior of RC beams with RC jackets containing glass fibers and micro silica gel. The results of the tests indicated that the proposed jackets could increase the energy absorption capacity by about four times.…”

Section: Introductionmentioning

confidence: 99%

Retrofitting of Reinforced Concrete Beams using Lightweight RC Jacket Containing Silica Nano Particles and Glass Fiber

Ghanbari¹,

Kohnehpooshi²,

Tohidi³

2022

IJE

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The concrete jacket method is a common method used in retrofitting buildings. Although this method has many advantages, engineers criticize it due to an increase in the structure's weight. In the present study, lightweight concretes containing silica nanoparticles (SNPs) and glass fibers (GF) have been used in concrete jackets to strengthen concrete beams. Several reinforced concrete (RC) beams were constructed and retrofitted using the proposed lightweight concrete jackets and their response to fourpoint loading was evaluated. The SNPs amount in the lightweight concrete jackets was 0, 2, 4, and 6% by weight of cement and the amount of GF was 1.5% by volume of concrete. Load-deflection curves were extracted and the response of the beams was examined by parameters such as crack load, yield load, maximum load, energy absorption capacity, and ductility. The proposed lightweight concrete jacket containing 1.5% of GFs in which 0, 2, 4, and 6% of SNPs were used, increased the energy absorption capacity by 33%, 54%, 61%, and 62%, respectively. The presence of SNPs in lightweight concrete reinforced by GFs leads to the filling of small cavities in the concrete. Also, the bearing capacity of the retrofitted RC beams increased with an increase in SNPs in the concrete jacket. A portion of this increase can be attributed to an increase in tensile and compressive strength of the proposed concrete, and the other part can be attributed to the effect of SNPs on the surrounding surfaces of the main beam and jacket.

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Strengthening of RC Beams Using SCC Jacket Consisting of Glass Fiber and Fiber-Silica Fume Composite Gel

Cited by 4 publications

References 37 publications

An Experimental Study to Predict a New Formula for Calculating the Deflection in Wide Concrete Beams Reinforced with Shear Steel Plates

An Experimental Study to Predict a New Formula for Calculating the Deflection in Wide Concrete Beams Reinforced with Shear Steel Plates

Strengthening of RC Beams using Steel Plate-Fiber Concrete Composite Jackets (Finite Element Simulation and Experimental Investigation)

Retrofitting of Reinforced Concrete Beams using Lightweight RC Jacket Containing Silica Nano Particles and Glass Fiber

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