Nonlinear Finite Element Modeling of Composite Bridge Girders Strengthened with HM-CFRP Laminates

Aktaş, Muharrem; Sümer, Yusuf; Ağcakoca, Elif; Yaman, Zeynep

doi:10.1007/s13369-015-1981-6

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…The FEA model is a good and successful method to predict the load-deflection behavior of strengthened steel I-beams, and the failure modes observed from both the finite element model (FEM) and tests are highly similar, including not only the numerical values of loaddeflection but also the failure modes [15]. By accounting for nonlinear constitutive laws and geometric nonlinearity, a proposed 3D FE model accurately predicts the flexural behavior of CFRP-strengthened steel beams [16].…”

Section: Introductionmentioning

confidence: 99%

Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange

2023

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This study investigates the effectiveness of a carbon-fiber-reinforced polymer (CFRP) in enhancing the load-carrying capacity of a steel main girder in a metro station. The objective is to evaluate the applicability of CFRPs in sustaining increases in applied loads and assessing their effectiveness on curved surfaces. Finite element analysis (FEA) identified the most stressed areas of the girder under design loads. Based on the FEA results, a targeted strengthening procedure using CFRP sheets was proposed. Various arrangements of CFRP sheets were tested, including different orientations and thicknesses up to 60% of the girder’s flange thickness. To validate the FEA accuracy, two small-scale specimen beams were prepared and tested in the laboratory. One beam was strengthened with CFRP sheets on the tension part of the inner flange side, similar to the suggested strengthening method for the girder. The FEA results show that the CFRP increases stresses by an average of 8% to 10% for the steel main girder, with strengthening effects up to 19% at the center of the CFRP strengthening positions, differing from a regular straight flange shape. Significantly reducing stresses required a total CFRP layer thickness of at least 50% of the flange’s total thickness. Applying a CFRP on the inner face of the girder preserves its usability without the need for openings in finishes or the metal deck surface. The findings highlight CFRP’s potential to enhance load-carrying capacity on curved surfaces and sustain increased applied loads, offering a promising solution for strengthening infrastructure and similar applications.

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Section: Introductionmentioning

confidence: 99%

Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange

2023

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“…FRP kompozitler ile güçlendirilmiş kirişler üzerine yapılan deneysel çalışmalar ile kirişlerin taşıma kapasiteleri ve güçlendirme şekilleri araştırılmaktadır [8]- [12]. Sonlu Elemanlar Metodu (SEM) programlarıyla betonarme kirişlerin modellenmesi üzerine birçok çalışma yapılmıştır [13]- [17]. Deneysel çalışmalar zaman ve maliyete neden olduğundan yapılan çalışma sınırlı kalabilmektedir.…”

Section: Introductionunclassified

CFRP ile Güçlendirilmiş Eğilme Yükü Etkisindeki Betonarme Kirişlerin Sonlu Elemanlar Yöntemi ile Analizi

Hussien¹,

Sarbıyık²,

Aydın³

2018

acperpro

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ÖZETBu çalışmada, eğilme yüküne karşı Karbon Fiber Takviyeli Polimer (CFRP) kompozitler ile güçlendirilmiş betonarme kirişlerin davranışı Abaqus sonlu elemanlar programı ile modellenmiştir. Düşük dayanımlı beton, yetersiz eğilme ve kesme donatısı kullanılarak üretilen dikdörtgen kesitli betonarme kirişler, tekyönlü karbon kumaşlar enine ve boyuna doğrultularda yönlendirilerek U şeklinde güçlendirilmiştir. Dört nokta eğilme deneyi ile test edilen kirişlerin eğilme davranışları tespit edilerek Sonlu Elemanlar Metoduyla (SEM) ile doğrulanmıştır. SEM programında istenen parametreler, deneysel çalışmalardan, literatürden, modellemede yaygın olarak kullanılan bazı temel formüllerden ve ürün kataloglarından elde edilmiştir. Gerekli parametreler SEM paket programına girilerek betonarme kiriş modeli kurulmuştur. Betonarme kirişin davranışı doğrulanarak CFRP ile güçlendirilmiş kirişler modellenmiştir. SEM'de CFRP kompozitler kabuk eleman olarak kirişin alt ve yan yüzeylerine tanımlanmıştır. Çözüm ağı boyutu ve geometrik şekli, genişleme açısı gibi model parametreleri, betonarme kirişin davranışını önemli ölçüde etkilediği görülmüştür. Elde edilen sonuçlara göre betonarme kiriş için en uygun parametreler tespit edilmiştir. SEM sonuçları deneysel çalışmadan elde edilen yük-sehim grafikleri ile karşılaştırılarak oluşturulan model doğrulanmıştır.Anahtar Kelimeler: betonarme kiriş, güçlendirme, sonlu elemanlar modeli, CFRP. ABSTRACTIn this study, the behavior of reinforced concrete beams strengthened with Carbon Fiber Reinforced Polymer (CFRP) composites is modeled by abaqus finite element program under Flexural load. Rectangular cross section reinforced concrete beams produced by using low strength concrete, insufficient bending and shear reinforcement are strengthened in U shape by guiding unidirectional carbon fabrics in transverse and longitudinal directions. The Flexural behavior of the beams tested by the four-point bending test was determined and verified by the Finite Element Method (FEM).The parameters required in the FEM program were obtained from experimental studies, literature, some basic formulas commonly used in modeling and product catalogues. The required parameters are entered into the FEM package program and the reinforced concrete beam model is established. The behavior of reinforced concrete beams is confirmed and modeled by CFRP reinforced beams. CFRP composites in FEM are defined as shell elements on the sub-surface and lateral surfaces of the beam. Model parameters, such as mesh size and geometric shape, dilation angle, have been observed to significantly affect the behavior of reinforced concrete beams. According to the results, the most appropriate parameters for reinforced concrete beams were determined. The FEM results were compared with the load-displacement behaviors obtained from the experimental study and the model was verified.

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A Comparative Study on the Effect of CNT or Alumina Nanoparticles on the Tensile Properties of Epoxy Nanocomposites

Yazman

Samanci

2018

Arab J Sci Eng

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Nonlinear Finite Element Modeling of Composite Bridge Girders Strengthened with HM-CFRP Laminates

Cited by 5 publications

References 22 publications

Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange

Practical Investigation on the Strengthening of the Built-Up Steel Main Girder of a Metro Station with Carbon-Fiber-Reinforced Polymer on the Inside Part of the Tensioned Flange

CFRP ile Güçlendirilmiş Eğilme Yükü Etkisindeki Betonarme Kirişlerin Sonlu Elemanlar Yöntemi ile Analizi

A Comparative Study on the Effect of CNT or Alumina Nanoparticles on the Tensile Properties of Epoxy Nanocomposites

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