Web-flange behavior of pultruded GFRP I-beams: A lattice model for the interpretation of experimental results

Fascetti, Alessandro; Feo, Luciano; Nisticò, Nicola; Penna, Rosa

doi:10.1016/j.compositesb.2016.06.058

Cited by 73 publications

(26 citation statements)

References 21 publications

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“…From three-point bend tests on portions of the web rotationally restrained at the ends by clamping the FWJs, they surmised that this asymmetry led to inconsistent moment-rotation characteristics between the FWJs of different specimens. Feo et al [12], Fascetti et al [13] and Quadrino et al [14] also observed wavy fractures at the FWJs during vertical pull-out tests on pultruded I-sections. For the publications describing these above cited studies on pultruded decks and I-sections, Table 1 Other experimental studies have investigated the effects of fibre waviness on the structural integrity of FRPs at a fundamental level.…”

mentioning

confidence: 91%

Fibre waviness in pultruded bridge deck profiles: Geometric characterisation and consequences on ultimate behaviour

Sebastian

2018

Composites Part B: Engineering

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Conventional tests cannot be used to establish the important influence of fibre waviness, a manufacturing legacy at the flange-web joints (FWJs) of pultruded GFRP bridge decks, on the local ultimate behaviour of such decks. Hence a novel, simple and reliable three-step experimental scheme for that purpose is presented herein, using one pultruded deck profile as an exemplar. First, for the given profile, the different individual and bonded deck-deck joint geometries which must be targeted for testing are identified. Second, an effective manual method is put forward to map this waviness at the FWJs. Third, a quasi-static test setup is introduced which enables statically determinate loading of one joint at a time, while also ensuring continuity between this joint and the remaining deck so that the real load paths within the deck are preserved. During the tests failure always occurred by fracture of the wavy fibre-resin interfaces within the FWJs, with a distinct inverse correlation between fibre waviness and failure load, and with the influence of bonding on joint failure behaviour depending on the local flange-web layout. It is concluded that this simple test is sufficiently reliable for extension to assessing local fatigue behaviour at the joints.

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confidence: 91%

Fibre waviness in pultruded bridge deck profiles: Geometric characterisation and consequences on ultimate behaviour

Sebastian

2018

Composites Part B: Engineering

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“…This discrete model was successfully used in Ref. [43] to correctly capture the crack paths and maintaining a substantial independence on the mesh in FRPs.…”

Section: Numerical Simulationmentioning

confidence: 99%

Experimental and numerical investigations on the flexural performance of geopolymers reinforced with short hybrid polymeric fibres

Kheradmand

Mastali

Abdollahnejad

et al. 2017

Composites Part B: Engineering

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a b s t r a c tGeopolymers have much higher drying shrinkage than Portland cement based composites Shrinkage performance is an important property for reinforced concrete composites just because a high shrinkage performance is associated to cracking tendency that leads to future durability problems. This paper provides results experimental and numerical investigations of fly ash based geopolymeric mortars reinforced with short hybrid polymeric fibres (SHPF). The results show that SHPF improved the flexural performance, while reducing the compressive strength and flexural stiffness of geopolymeric mortars. The addition of 0.8% SHPF increased about two times the fracture energy and about 50% the tensile strength. The adopted constitutive model well-captured the flexural performance of the tested beams.

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“…This type of structures should operate in the stable range (the increase in the post-critical deflection is directly accompanied by the load increase). The stability issue of this type of profiles is presented in many research papers [ 1 , 2 , 3 ]. Buckling can occur as a result of axial loading on thin-walled structures [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental-Numerical Failure Analysis of Thin-Walled Composite Columns Using Advanced Damage Models

et al. 2021

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The paper analyzes the stability and failure phenomenon of compressed thin-walled composite columns. Thin-walled columns (top-hat and channel section columns) were made of carbon fiber reinforced polymer (CFRP) composite material (using the autoclave technique). An experimental study on actual structures and numerical calculations on computational models using the finite element method was performed. During the experimental study, post-critical equilibrium paths were registered with acoustic emission signals, in order to register the damage phenomenon. Simultaneously to the experimental tests, numerical simulations were performed using progressive failure analysis (PFA) and cohesive zone model (CZM). A measurable effect of the conducted experimental-numerical research was the analysis of the failure phenomenon, both for the top-hat and channel section columns (including delamination phenomenon). The main objective of this study was to be able to evaluate the delamination phenomenon, with further analysis of this phenomenon. The results of the numerical tests showed a compatibility with experimental tests.

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Web-flange behavior of pultruded GFRP I-beams: A lattice model for the interpretation of experimental results

Cited by 73 publications

References 21 publications

Fibre waviness in pultruded bridge deck profiles: Geometric characterisation and consequences on ultimate behaviour

Fibre waviness in pultruded bridge deck profiles: Geometric characterisation and consequences on ultimate behaviour

Experimental and numerical investigations on the flexural performance of geopolymers reinforced with short hybrid polymeric fibres

Experimental-Numerical Failure Analysis of Thin-Walled Composite Columns Using Advanced Damage Models

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