Flexural behavior of RC beams strengthened with steel wire mesh and self-compacting concrete jacketing — experimental investigation and test results

Maraq, Mohamed A. Abu; Tayeh, Bassam A.; Ziara, Mohamed M.; Alyousef, Rayed

doi:10.1016/j.jmrt.2020.12.069

Cited by 52 publications

(14 citation statements)

References 22 publications

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“…Welded wire mesh has a tight opening, which is uniformly dispersed and welded via rods to create evenly spaced wire mesh. 42 Welded wire mesh has different benefits, such as a high strength-to-weight ratio, ease of handling in construction sites, corrosion resistance, lightweight, fire resistant, low price, and so forth. 43 Moreover, using welded wire mesh saves time and cost because of the decrease in using discarded parts and low labor charges.…”

Section: Introductionmentioning

confidence: 99%

Rehabilitation of post‐heated rectangular reinforced concrete columns using different strengthening configuration

Abadel

2023

Structural Concrete

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It is common knowledge that increased temperatures have a negative impact on the axial load‐capacity and stiffness of reinforced concrete (RC) rectangular columns. This is something that is commonly acknowledged. For the purpose of restoring the axial capacity and stiffness of heat‐damaged RC columns, it is absolutely essential to carefully pick a suitable method for strengthening and repairing the columns. This research paper investigates the performance of various strengthening methods, such as the use of carbon fiber‐reinforced polymer (CFRP) jackets with near‐surface mounted (NSM) steel bars and a combination of welded wire mesh (WWM) and CFRP strengthening techniques, for the rehabilitation of RC rectangular columns that have been damaged due to exposure to high temperatures. Specifically, the paper focuses on the performance of these methods in relation to the rehabilitation of RC rectangular columns. There were three groups of tested RC rectangular columns: pre‐heated and unstrengthened, post‐heated and unstrengthened, and post‐heated and strengthened. Over a period of 3 h, 600°C was applied to the heated columns. Both a scheme utilizing a combination of unidirectional CFRP strips and NSM steel bars and another utilizing a combination of unidirectional CFRP strips and WWM were evaluated. Axial compression tests were performed on each column until failure occurred. The experimental test outcomes revealed that exposure to high elevated temperatures led to a decrease in the axial load‐carrying capacity of 38.6% and a decrease of 75.9% in initial stiffness, compared to unheated RC columns. Both strengthening schemes proved effective in restoring and surpassing the initial load‐carrying capacity of undamaged RC rectangular columns by an average of 35%. Notably, the combination of CFRP strips and WWM exhibited superior performance in restoring the initial stiffness of post‐heated RC rectangular columns, representing a novel finding. The strengthening scheme employing WWM and CFRP recovered 61.3% of the lost axial strength caused by high temperature, while the NSM/CFRP scheme restored 34.5% of the lost axial strength. In addition, the utilization of NSM in combination with CFRP strips as well as utilization of the WWM and CFRP systems leads to stiffness enhancement of 52.1% and 123.7%, respectively, when compared to post‐heated and unstrengthened RC columns. However, the study's findings have clearly shown that combination of WWM and CFRP strips is efficient in enhancing the strength of heated and unheated damage RC beams.

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Section: Introductionmentioning

confidence: 99%

Rehabilitation of post‐heated rectangular reinforced concrete columns using different strengthening configuration

Abadel

2023

Structural Concrete

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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%

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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“…The proposed method enhanced the bearing load about 155 to 447% [12]. Maraq et al [17] investigated the flexural behavior of reinforced concrete beams with steel wire mesh and self-compacting concrete jacket. The proposed method increased the bearing capacity of the beam by about 110 to 163% [17].…”

Section: Introductionmentioning

confidence: 99%

“…Maraq et al [17] investigated the flexural behavior of reinforced concrete beams with steel wire mesh and self-compacting concrete jacket. The proposed method increased the bearing capacity of the beam by about 110 to 163% [17]. Ghalehnovi et al [18] investigated the retrofitting of concrete beams made from recycled materials using reinforced concrete jackets made of steel fibers.…”

Section: Introductionmentioning

confidence: 99%

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

Mohsenzadeh

Maleki

Lotfollahi-Yaghin

2021

IJE

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In this paper, strengthening of RC beams with self-consolodating concrete (SCC) jacket containing glass fiber (GF) and fiber-silica fume composite gel (FSCG) were investigated. FSCG can use as a substitute for a part of the cement that contains silica fume powder, polypropylene fibers, superplasticizer, concrete waterproof, and some other admixtures. In order to evaluate the performance of the proposed jacket, twelve beams were strengthened and a control beam was made. The variables included the amount of glass fibers consumed in the jacket (0, 0.25, 0.5, 0.75, 1 and 1.25% by volume) and the amount of FSCG gel (0 and 7%), respectively. Fresh and hardened concrete properties and flexural capacity of RC beams were investigated. The use of FSCG in RC jackets can compensate well for the deficiency in strength due to the GF entry into the concrete matrix. High affinity of these materials improve the cohesion between cement and GFs. RC jackets containing GF and FSCG increased the beams' energy absorption capacity by about 89 to 463%, depending on the percentages of GFs. RC jacket containing GF and FSCG delays the growth of the primary crack and it can significantly increase the maximum load. Also, Glass Fiber Reinforced Polymer (GFRP) sheets have poor performance compared to the proposed method due to separation from the surface of the strengthened beams, and their load-bearing capacity and energy absorption are lower.

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Flexural behavior of RC beams strengthened with steel wire mesh and self-compacting concrete jacketing — experimental investigation and test results

Cited by 52 publications

References 22 publications

Rehabilitation of post‐heated rectangular reinforced concrete columns using different strengthening configuration

Rehabilitation of post‐heated rectangular reinforced concrete columns using different strengthening configuration

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

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

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