Experimental and theoretical analysis of severely damaged concrete beams strengthened with CFRP

Kabir, Muhammad Ikramul; Subhani, Mahbube; Shrestha, Rijun; Samali, Bijan

doi:10.1016/j.conbuildmat.2018.05.038

Cited by 22 publications

(11 citation statements)

References 22 publications

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“…Various examination [4][5][6] has been completed on the strategy of fortification and/or bar fix on account of arch and shear on account of the most extreme and on account of as far as possible, on tear positions, on the division of the compound and on the weariness of the strengthened solid components with the composite texture. Along these lines numerous ends and suggestions were made, yet the investigation of improved bundles on account of administration limits is uncommon [7,8]. A few models have been proposed to anticipate the compound's commitment to reestablishing shear quality [5,9].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Investigation of composite materials supported by carbon fiber fabric (TFC) in pre-cracked concrete beams

Karnoub

Huang

Antypas

2020

J. Phys.: Conf. Ser.

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This work is a commitment to breaking down the conduct of pillars that strengthened by composite materials. The investigation was helped out through an exploratory and logical examination on eleven strengthened concrete and fortified solid components underneath and decently strengthened, pre-split and afterward strengthened utilizing nearby carbon-fiber texture utilizing epoxy pitches. So as to consider the impact of the underlying splitting condition on the conduct, one of the bars was strengthened without being broken ahead of time and contrasted with a pre-broken and fortified bundle and afterward to another stacked in any event, when broken without breaking or hardening. In this examination, four beams were pre-broken and reinforced in the all-inclusive part and as an afterthought part with U-formed pieces of various measurements to keep away from division on one side and the investigation of rebuilding of the compound at the impact of shear then again. At long last, a similar report was directed between the last estimated exploratory obstruction and that registered by expository models.

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Section: Introductionmentioning

confidence: 99%

RETRACTED: Investigation of composite materials supported by carbon fiber fabric (TFC) in pre-cracked concrete beams

Karnoub

Huang

Antypas

2020

J. Phys.: Conf. Ser.

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“…This section provides recommendations for the repair of girders with flexural deficiency, based on the repair case studies found in 151 studies, including both research and real-life applications of the repairs which are both critical for achieving a sufficient understanding of a repair technique. Eight different methods were found in the literature: (1) EB FRP sheets on the soffit + EB FRP U-wraps or complete wraps [ 24 , 46 , 65 , 67 , 75 , 76 , 89 , 101 , 102 , 103 , 111 , 117 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 , 136 , 137 , 138 , 139 , 140 , 141 , 142 , 143 , 144 , 145 , 146 , 147 , 148 , 149 , 150 , 151 , 152 ]; (2) EB continuous FRP U-wraps [ 17 , 38 ,…”

Section: Repair For Flexurementioning

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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“…c E and frp E are the elastic moduli of the concrete and FRP, respectively. This method can approximately reflect the relationship between the load and the deformation of the strengthened beam after the yield of tensile steel reinforcement (Kabir et al, 2018). It is noteworthy that Narayanamurthy et al, (2012) also used similar methods to calculate the flexural stiffness and the compressive stiffness of RC beams when predicting the debonding of the FRP plate ends.…”

Section: Simplification Of the Nonlinear Behavior Of Strengthened Beamsmentioning

confidence: 99%

Prediction of the IC debonding failure of FRP-strengthened RC beams based on the cohesive zone model

Zhang

Guo

et al. 2020

Lat. Am. j. solids struct.

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Intermediate crack (IC) debonding failure is one of the common bending failure forms of fiber-reinforced polymer (FRP)-strengthened reinforced concrete (RC) beams. In this paper, a new prediction model for IC debonding in FRP-strengthened RC beams is proposed based on fracture mechanics and cohesive zone model (CZM), which takes into account the coupling effect of many parameters and has the advantages of high precision and simple expression. The nonlinear behavior of FRP-strengthened RC beams and the influence of flexural cracks are reasonably considered in this model, whereas all existing analytical models based on the CZM neglect this effects. To verify the accuracy of this model, we established a database containing 248 test data from the existing literature. By comparing the differences between the predicted and experimental results, we analyzed the causes of the error and established a semiempirical model. To test the reliability of the model, it is evaluated using the database constructed in this paper together with four representative strength models. The results show that the semiempirical model has a high accuracy.

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Experimental and theoretical analysis of severely damaged concrete beams strengthened with CFRP

Cited by 22 publications

References 22 publications

RETRACTED: Investigation of composite materials supported by carbon fiber fabric (TFC) in pre-cracked concrete beams

RETRACTED: Investigation of composite materials supported by carbon fiber fabric (TFC) in pre-cracked concrete beams

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

Prediction of the IC debonding failure of FRP-strengthened RC beams based on the cohesive zone model

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