Correction factors for stress intensity of CFRP-strengthened wide-flange steel beams with various crack configurations

Hmidan, Amer; Kim, Yail J.; Yazdani, S.

doi:10.1016/j.conbuildmat.2014.08.008

Cited by 13 publications

(3 citation statements)

References 23 publications

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“…e main conclusion was that the reinforced section must achieve a large curvature in order to develop its ultimate bending moment resistance, so it was necessary to use stiffeners to avoid local instability problems in the webs and in the flanges. Hmidan et al [7] studied the crack-tip properties of W4 × 13 steel beams with wide flanges reinforced with CFRP sheets.…”

Section: Introductionmentioning

confidence: 99%

Test and Numerical Analysis on Damaged Steel Beam Strengthened with Prestressed CFRP Sheet

Hou

Wang

Lian-guang

2021

Advances in Civil Engineering

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This paper presents the experimental and numerical analysis of damaged steel beams strengthened with prestressed CFRP sheet or only strengthened with CFRP sheet. The test results showed that damaged level had a significant effect on the stiffness, yield load, and ultimate bearing capacity. And using prestressing CFRP sheet to strengthen damaged steel beam could increase the ultimate bearing capacity. The numerical analysis results showed that the damaged level had a significant effect on the stiffness and ultimate bearing capacity. The strengthened steel beam with the damaged level could exceed the steel beam without damage by about 10% in the ultimate bearing capacity. The ultimate bearing capacity would increase about 8% when the flange or web thickness increased per 1 mm. The ultimate bearing capacity would increase about 3% when the thickness or width of CFRP sheet increased per 0.05 mm or 10 mm. The bearing capacity would increase about 1.5% when the prestressed degree increased about 7%.

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Section: Introductionmentioning

confidence: 99%

Test and Numerical Analysis on Damaged Steel Beam Strengthened with Prestressed CFRP Sheet

Hou

Wang

Lian-guang

2021

Advances in Civil Engineering

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“…For cracked metallic structures, other fatigue crack repair methods, including the hole drilling, weld repair, use of doublers or splice plates, and posttensioning, have been used (Dexter and Ocel 2013). The adhesive-bonded FRP patches can significantly increase the fatigue life by reducing the crack tip stress intensity factor (SIF) (Liu et al 2009a;Täljsten et al 2009;Hmidan et al 2014Hmidan et al , 2015Wang et al 2016b;Zheng and Dawood 2017;Aljabar et al 2017). A reduction in the SIF can be predicted by several calculation methods.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Fiber-Reinforced Polymer Patches for Repairing Fatigue Cracks in Steel Plates Using a Genetic Algorithm

Lenwari

2020

J. Compos. Constr.

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A practical design optimization of fiber-reinforced polymer (FRP) patches for repairing fatigue cracks in metallic structures is presented. The design procedure combines finite-element (FE), genetic programming (GP), and genetic algorithm (GA) approaches. An optimum patch design is defined as the combination of design parameters that simultaneously minimizes the patch volume and reduces the stress intensity factor (SIF) range below the fatigue threshold range. A patching correction factor, which accounts for the positive effects of material and geometric properties of the patch and adhesive layer on the SIF solution, is proposed. The correction factor is developed by performing symbolic regression via GP analyses on the SIF values obtained from the three-dimensional FE models. The closed-form SIF solution facilitates the visualization of the effects of design parameters, simplifies the calculation of fatigue life, and reduces the computation effort for design optimization. An example of the center-cracked steel plate subjected to constant amplitude fatigue loading and then repaired with double-sided adhesive-bonded FRP patches is used to illustrate the optimization procedure.

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“…Mean S-N curves were obtained based on the test data, that can be used to predict the fatigue life of steel beams retrofitted with similar CFRP materials. Amer [10] presented the crack-tip behavior of wide-flange steel beams strengthened with carbon fiber reinforced polymer (CFRP) sheets. Three-dimensional finite element models were developed to predict stress singularity at the crack-tip, including an adaptive mesh formulation along with isoperimetric quadratic elements.…”

Section: Introductionmentioning

confidence: 99%

Study on Fatigue Property of Cracked Steel Plate Strengthened by CFRP

Wei-kang

Zang

2019

MATEC Web Conf.

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This paper presents fatigue property of CFRP-strengthened cracked steel plate. Firstly, the finite element model of CFRP-strengthened cracked steel plate is established by using the cohesive zone model. With the finite element model, stress intensity factor of the crack-tipis calculated. Then, it gives the fatigue tests of cracked steel plate. According to the experimental data, the material constants C and n value sare obtained. The prediction fatigue life is calculated by the finite element model and Paris function and verified by the experimental data. The results show that the prediction fatigue life, calculated by the finite element model and the Paris formula, is consistent with the experimental fatigue life, which verifies the accuracy of our prediction model with finite element model and the Paris function.

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Correction factors for stress intensity of CFRP-strengthened wide-flange steel beams with various crack configurations

Cited by 13 publications

References 23 publications

Test and Numerical Analysis on Damaged Steel Beam Strengthened with Prestressed CFRP Sheet

Test and Numerical Analysis on Damaged Steel Beam Strengthened with Prestressed CFRP Sheet

Optimization of Fiber-Reinforced Polymer Patches for Repairing Fatigue Cracks in Steel Plates Using a Genetic Algorithm

Study on Fatigue Property of Cracked Steel Plate Strengthened by CFRP

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