Finite element modelling of CFRP jacketed CFST members under flexural loading

Sundarraja, M.C.; Prabhu, G. Ganesh

doi:10.1016/j.tws.2011.07.008

Cited by 33 publications

(31 citation statements)

References 7 publications

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“…Finite element analysis has been used frequently in previous researches to predict the behavior of CFST using available commercial finite element software like ANSYS [16] and ABAQUS [17]. Hu et al [18] developed a nonlinear FE model to simulate CFST columns, and verified it against experimental data extracted from the literature.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations of the compressive behavior of concrete filled steel tubes (CFSTs)

Abed

AlHamaydeh

Abdalla

2013

Journal of Constructional Steel Research

168

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations of the compressive behavior of concrete filled steel tubes (CFSTs)

Abed

AlHamaydeh

Abdalla

2013

Journal of Constructional Steel Research

168

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“…The main objective was to examine the efficiency of CFRP anchors to delay CFRP end-debonding failure and thereby upturn the ultimate failure loads CFRP/concrete composites. Concrete was represented by Solid 65 [11,12], whereas steel reinforcements and anchor heads were modeled using Link 8 spar [11] element type. CFRP sheet and anchor heads were characterized by the element Shell 41 [11].…”

Section: Finite Element Modeling Of Cfrp Anchorsmentioning

confidence: 99%

“…Concrete was represented by Solid 65 [11,12], whereas steel reinforcements and anchor heads were modeled using Link 8 spar [11] element type. CFRP sheet and anchor heads were characterized by the element Shell 41 [11]. Concrete was meshed as hex diagonals of 25 mm ẋ 25 mm and the meshed concrete beam is shown in Fig.…”

Section: Finite Element Modeling Of Cfrp Anchorsmentioning

confidence: 99%

Investigation on Enhancing Flexural Performance of CFRP Strengthened Concrete Beams

Gamage¹,

Ariyachandra²

2015

Second International Conference on Advances in Civil, Structural and Mechanical Engineering - ACSM 2015

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Abstract-Strengthening of reinforced concrete structures is inevitable to preserve structural integrity and protracted service life due to the effects of numerous elements contained within the natural or artificial environment surrounding it. Carbon Fibre Reinforced Polymer (CFRP) composites have been progressively more utilized for decades as a strengthening material due to its outstanding characteristics such as high strength to weight ratio, reduced weight, excellent resistance to corrosion and environmental degradation and ease of handling during construction which have distinguished it well apart from the other strengthening techniques. However, the ultimate load capacity of CFRP strengthened concrete composites is comparatively lower than CFRP material due to premature debonding which reported as the most frequently observed failure mode in CFRP/concrete composites. In the current study, alternative bonding techniques were investigated to achieve enhanced bond performance by delaying premature debonding failure. A total of 18 CFRP strengthened concrete beams with different bonding techniques were tested using three point bending test. The test results show convincing evidence on strength enhancements. Moreover, a numerical model was also developed to inspect the performance of existing CFRP anchors. Finally, a parametric study was carried out and a new type of anchor; "Tri-leg anchor" is introduced. This paper summarizes the overview of the test programme, finite element modeling, results and analysis.

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“…Recent study shows that CF-CFRP-ST has satisfactory fire endurance time when adequate fire resistant measures have been taken (Tao et al [21]). There are many research studies about CF-CFRP-ST structures in the literature, and these studies mostly focus on Circular CF-CFRP-ST (C-CF-CFRP-ST) stub columns (Xiao et al [22]; Choi and Xiao [23]; Park et al [24]; Hu et al [25]; Li et al [26]; Teng et al [27]), C-CF-CFRP-ST flexural members (Wang and Shao [28]), Square CF-CFRP-ST (S-CF-CFRP-ST) stub columns (Tao et al [29]; Park et al [30]; Sundarraja and Ganesh [31]; Sundarraja and Ganesh [32]; Sundarraja and Ganesh [33]; Wang and Shao [34]) and S-CF-CFRP-ST flexural members (Sundarraja and Ganesh [35]; Wang et al [36]). More applications in practical engineering are columns with large slenderness ratio (as shown in Figure 2) although corresponding research is quite scarce.…”

Section: Introductionmentioning

confidence: 99%

Static Behavior of Axially Compressed Circular Concrete Filled CFRP-Steel Tubular (C-Cf-CFRP-St) Columns With Moderate Slenderness Ratio

Wang¹,

Qu²,

Shao³

et al. 2016

Volume 12 Number 3

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Thirty-two specimens are experimentally tested in this paper to study the static performance of axially compressed circular concrete filled CFRP-steel tubular (C-CF-CFRP-ST) columns. The tested results indicate that, for columns with relative small slenderness ratio, failure is dominated by the strength loss of the materials. However, for columns with relative large slenderness ratio, failure is controlled by instability. The load versus deflection curves at the mid-height of the composite column can be divided into three stages, i.e., elastic, elasto-plastic and softening stage. Analyses of the tested results show that distribution of longitudinal strains in the steel tube over depth on the cross-section is approximately linear, and the steel tube and its outer CFRP material can cooperate both longitudinally and transversely. The longitudinal strain and the transverse strain at a point have opposite signs, and the steel tube under longitudinal tension has no transverse confinement effect on its concrete. The Deformed modes of the columns, the axial load verses deflection curves at the mid-height, the axial load verses axial shortening curves and the stresses in the steel tube are simulated by using finite element method. The calculated results agree well with the experimental results to prove the accuracy of the finite element model. Stresses in the concrete, the steel tube and the CFRPs are analyzed by using finite element method. The numerical results show that the interaction force between the steel tube and the concrete decreases gradually from compressive region to tensile region. The adhesive strength between the concrete and the steel tube has little effect on the critical buckling load and on the elastic stiffness of the columns. Equation for calculating the critical buckling load of the composite columns is presented, and the estimated results agree well with the experimental results.

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Finite element modelling of CFRP jacketed CFST members under flexural loading

Cited by 33 publications

References 7 publications

Experimental and numerical investigations of the compressive behavior of concrete filled steel tubes (CFSTs)

Experimental and numerical investigations of the compressive behavior of concrete filled steel tubes (CFSTs)

Investigation on Enhancing Flexural Performance of CFRP Strengthened Concrete Beams

Static Behavior of Axially Compressed Circular Concrete Filled CFRP-Steel Tubular (C-Cf-CFRP-St) Columns With Moderate Slenderness Ratio

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