Shear strengthening of reinforced concrete beams using externally-bonded aluminum alloy plates: An experimental study

Abdalla, Jamal A.; Abu-Obeidah, Adi; Hawileh, Rami A.; Rasheed, Hayder A.

doi:10.1016/j.conbuildmat.2016.10.071

Cited by 59 publications

(15 citation statements)

References 33 publications

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“…Substituting Equation (19) into Equation (18) and simplifying the Equation (18), the calculated equation for σ a can be estimated as follows: where a is the shear span length; d is the distance from the support to the end of the strengthening bar, as shown in Figure 10; P is the corresponding load bearing capacity; λ, m 1 , m 2 , and k can be calculated by the equation in Teng's model 43,44 as shown in the following:…”

Section: Improvement Of the Model For Flexural Strength Predictionmentioning

confidence: 99%

Feasibility of using aluminum alloy bars as near‐surface mounted reinforcement for flexural strengthening of reinforced concrete beams

Xing

Chang

Ozbulut

2020

Structural Concrete

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Aluminum alloys (AAs) possess various advantageous properties such as good corrosion resistance and high ductility and have recently gained interest in strengthening reinforced concrete (RC) structures. This paper investigates the potential application of AA bars as the near‐surface mounted (NSM) reinforcement in flexure strengthening of RC beams. A total of seven RC beams including one reference specimen and six specimens strengthened with NSM AA bars were designed and loaded monotonically up to failure. The tensile steel reinforcement ratio, NSM reinforcement ratio, precracking load, and bonding area of NSM reinforcement were selected as the main test variables. Results suggest that both the flexural capacity and stiffness of the strengthened beams improved with the use of NSM AA bars compared to the reference beam, and all the strengthened concrete beams exhibited a ductile failure mode. Nevertheless, increases in flexural load carrying capacities were modest when the AA bars were used as NSM reinforcement. Furthermore, an analytical model, which combined the sectional analysis method and interfacial stress analysis model, was developed to predict the load versus mid‐span deflection relationship of the concrete beams strengthened with NSM AA bars. The developed model was also capable of predicting the load–strain relationships in AA reinforcement. Good agreements were achieved between the analytical results and experimental results.

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Section: Improvement Of the Model For Flexural Strength Predictionmentioning

confidence: 99%

Feasibility of using aluminum alloy bars as near‐surface mounted reinforcement for flexural strengthening of reinforced concrete beams

Xing

Chang

Ozbulut

2020

Structural Concrete

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“…Grande et al, observed that using FRP can vary the cracking pattern, the deformation levels and the shear strength of reinforced concrete beams [6]. Abdalla et al observed that the shear capacity of the strengthened beams increased in a range of 24%-89% as compared to the un-strengthened beam [7]. Chaallal et al found that using epoxy-bonded strips is beneficial in restoring or increasing the load-carrying capacity of RC beams in shear and in reducing shear cracking [8].…”

Section: Literature Reviewmentioning

confidence: 99%

The Influence of CFRP Orientation Angle on the Shear Strength of RC Beams

Murad¹

2018

TOBCTJ

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Background:Carbon Fiber Reinforced Polymer (CFRP) sheets are widely used for strengthening and repairing reinforced concrete structures. Previous experimental studies have shown that strengthening Reinforced Concrete (RC) beams with CFRP sheet can be greatly influenced by the configuration, orientation and properties of the CFRP sheets.Objective:The behaviour of RC beams, strengthened with 60° and 45° inclined CFRP sheets, has not clearly explained.Method:Thus, an experimental program, proposed in this paper, investigates the shear behaviour of RC beams strengthened with CFRP sheets under different orientation angles including 0˚, 45˚, 60˚ and 90˚.Result:The study shows that strengthening RC beams with CFRP is highly influenced by the orientation angle of the sheets. The influence of CFRP sheets is remarkable on increasing the ultimate deflection, ductility and shear strength of RC beams.Conclusion:It is beneficial to strengthen RC beams, which are weak in shear, obliquely using 45˚ or 60˚ inclined CFRP sheets.

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“…The latter, however, can be referred to as a bridge that has inconsistencies with the current code requirements, such as narrow shoulders or lane widths, or inadequate clearance for oversize vehicles [ 2 , 3 ]. Common sources of damage to bridge girders are any of the following reasons or combinations of them [ 1 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]: (1) chloride attack, corrosion, and deterioration; (2) fatigue damage accumulation; (3) accidental damage such as overheight vehicle impact; (4) upgraded loading requirements and more stringent assessment codes; and (5) initial design flaws, construction defects, and a lack of maintenance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Repair Materials and Methods for Reinforced Concrete and Prestressed Bridge Girders

Ghaffary

Moustafa

2020

Materials

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Bridge structures nationwide across the United States are aging and in need of repair or, in some cases, full replacement. Repair decisions are common among bridge owners because of the economic feasibility when compared to the higher cost of full replacement of damaged or deteriorated bridge components such as girders. Using a proper repair approach, as a long-term or just a short-term solution, can lead to benefits that could not be achieved otherwise such as considerable savings in both time and cost. Additionally, an appropriate repair approach can help avoid adverse environmental impacts, interruptions to service, overburdening of nearby infrastructure, and local opposition to construction. The main objective of this paper is to provide a synthesis of the repair methods and materials for reinforced concrete bridge girders proposed in research studies, i.e., state-of-the-art as well as state-of-the-practice established methods. Different steps in the general repair procedure are explained first. Next, a detailed description of three common bridge girder deficiencies, i.e., shear, flexural, and fire damage, is provided. For each damage type, the main causes and common solutions found in the literature are presented. The authors then provide specific recommendations to each repair procedure. This is intended to enable researchers, engineers, and decision makers to compare the available repair methods more conveniently to find the optimal repair approach for specific projects based on economic and environmental requirements as well as structural and construction conditions.

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Shear strengthening of reinforced concrete beams using externally-bonded aluminum alloy plates: An experimental study

Cited by 59 publications

References 33 publications

Feasibility of using aluminum alloy bars as near‐surface mounted reinforcement for flexural strengthening of reinforced concrete beams

Feasibility of using aluminum alloy bars as near‐surface mounted reinforcement for flexural strengthening of reinforced concrete beams

The Influence of CFRP Orientation Angle on the Shear Strength of RC Beams

Synthesis of Repair Materials and Methods for Reinforced Concrete and Prestressed Bridge Girders

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