A simple and practical model for FRP-reinforced cracked beam

Shahbazpanahi, Shahram; Ali, Abang Abdullah Abang; Aznieta, Farah Nora; Kamgar, Alaleh; Farzadnia, Nima

doi:10.1080/19648189.2013.863741

Cited by 6 publications

(4 citation statements)

References 27 publications

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“…To model a crack using fracture mechanics, the cohesive zone model (CZM) was first proposed by Dugdale [17] to analyse brittle fracture. Hillerborg et al [18] were the first to use CZM, or the fictitious crack model, to calculate the softening fracture of concrete beams [19,20].…”

Section: Introductionmentioning

confidence: 99%

Modelling Crack Propagation in RC Beam-Column Joints

Shahbazpanahi

Hejazi

Paknahad³

et al. 2018

Teh. vjesn.

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Accurate modelling is required to estimate crack propagation in a beam-column joint. In this study, a numerical method is developed to model crack propagation and failure loading in a beam-column joint under static load. To realize this objective, a four-node, thin-layer interface element is produced to model the fracture process zone and crack propagation. Moreover, the fracture criterion for determining the growth of a crack based on the release rate of strain energy is established. To validate the present model, ABAQUS software is used to simulate crack propagation by conventional cohesive elements. The numerical results obtained are extremely close to the experimental results within an accuracy level ranging from 4.3% to 6.7%. Meanwhile, the ABAQUS software data and the experimental data are predicted at a margin of error ranging from 12.4% to 16%.

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Section: Introductionmentioning

confidence: 99%

Modelling Crack Propagation in RC Beam-Column Joints

Shahbazpanahi

Hejazi

Paknahad³

et al. 2018

Teh. vjesn.

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“…Therefore, the study of their behaviour, crack patterns, strut zone, failure mode, and strengthening is essential. Presenting an accurate fracture mechanics model for beam column joints is of great importance owing to the complex behaviour of the joints [7].…”

Section: Introductionmentioning

confidence: 99%

The development of a dynamic fracture propagation model for FRP-strengthened beam-column joints

Shahbazpanahi¹

2018

J. vibroeng.

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Accurate modeling is required to investigate the behavior of concrete structures strengthened by carbon fiber-reinforced polymer (CFRP). There is, however, limited knowledge on the use of dynamic modeling to study the crack propagation in the beam-column joints strengthened by CFRP. A finite element model is developed to study crack propagation in the CFRP-strengthened joints under dynamic loads. A three-dimensional model is developed to predict the crack propagation under cyclic loading in the ABAQUS software. In this study, dynamic fracture analysis is used to model the crack propagation in the concrete material. Furthermore, the model is used to predict dynamic debonding in CFRP strengthened with the fracture mechanics approach. The results of the present study showed a good agreement with previous experimental results by about 7.1-11.6 %. The proposed model indicates that the crack propagation is controlled by using CFRP composites in the beam-column joint. Furthermore, it is observed that the width of strut zone in the joint increases by the using of FRP strengthening.

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“…Fracture mechanics is a branch of solid mechanics, which deals with the behavior of the material and conditions in the vicinity of a crack (Shahbazpanahi, Ali, Aznieta, Kamgar, & Farzadnia, 2013a).The concept of fracture mechanics was first used for pre-cracked concrete structures in the early 1960s (Shahbazpanahi, Abang, Kamgar, & Farzadnia, 2014). Concrete structures are prone to crack propagation.…”

Section: Introductionmentioning

confidence: 99%

<b>Mechanical analysis of a shear-cracked RC beam

Shahbazpanahi

2017

Acta Sci. Technol.

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Shear crack analysis is essential for engineers to estimate repair work in concrete structures. So far, conventional theoretical and numerical analyses in fracture mechanics have been applied to study concrete flexural beams, but there is still little knowledge regarding the shear capacity for beams with a diagonal initial notch. In this study, a theoretical analysis is presented to obtain fracture resistance in a fourpoint RC beam with two inclined initial notch on supports. Here, a fictitious crack approach is adopted for estimating the equivalent effect of the fracture process zone of concrete in shear-cracked. Based on equilibrium equation in the beam notch cross section, shear force was expressed in terms of fracture process zone length. Then, in a double notch four-point beam, Mode II of the stress intensity factor due to the external load is determined. Finally, this process presents the relationship between the shear capacity and the fracture process zone length and expresses the fracture resistance as a function of fracture process zone length.The predicted results of loading capacities are then shown.

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A simple and practical model for FRP-reinforced cracked beam

Cited by 6 publications

References 27 publications

Modelling Crack Propagation in RC Beam-Column Joints

Modelling Crack Propagation in RC Beam-Column Joints

The development of a dynamic fracture propagation model for FRP-strengthened beam-column joints

<b>Mechanical analysis of a shear-cracked RC beam

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