Fatigue of Reinforced Concrete Beams Strengthened with Steel-Reinforced Inorganic Polymers

Katakalos, Konstantinos; Papakonstantinou, Christos G.

doi:10.1061/(asce)1090-0268(2009)13:2(103)

Cited by 42 publications

(27 citation statements)

References 29 publications

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“…This limitation may be readily overcome through fibre reinforcement as in high-performance polymer-matrix composites. Hitherto, the most common fibre reinforcement used in geopolymer composites is based on steel, carbon, polypropylene (PP) and polyvinyl alcohol (PVA) [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

et al. 2014

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Abstract:Geopolymer composites containing woven cotton fabric (0-8.3 wt%) were fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 ℃, 400 ℃, 600 ℃, 800 ℃ and 1000 ℃. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 ℃, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

et al. 2014

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“…The phenomenon of fatigue induces irreversible and progressive damage in materials subjected to cyclic stress. The phenomenon is documented in the literature and Eurocodes for traditional concrete (TC) but not for self-compacting concrete (SCC) CEN, 2004CEN, , 2005aDe Schutter et al, 2008;Guo et al, 2010;Katakalos and Papakonstantinou, 2009;Lindorf and Curbach, 2010;Pryl et al, 2010). Changes in concrete composition, a decrease in coarse aggregate content in combination with the addition of filler and superplasticiser may lead to different fatigue behaviour of SCC as compared with that of TC.…”

Section: Introductionmentioning

confidence: 99%

Fatigue resistance of dynamically loaded self-compacting concrete

Corte

Boel

2012

Magazine of Concrete Research

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The phenomenon of concrete fatigue is well documented in the literature for traditional concrete (TC), but this is not the case for self-compacting concrete (SCC). However, both concrete types differ substantially in composition and it remains to be seen whether all relevant mechanical properties including crack propagation and fatigue resistance are equal for SCC and TC mixtures of equal compressive strength. In this work, 32 reinforced concrete beams with varying reinforcement ratios and varying vertical stirrup quantities were subjected to static and dynamic loading until failure in a four-point bending rig. SCC and TC of equal compressive strength were delivered by a ready-mix concrete supplier. The imposed stress levels for dynamic loading were 0 . 10f cc -0 . 75f cc , 0 . 10f cc -0 . 80f cc and 0 . 10f cc -0 . 85f cc : Structural behavioural properties such as deflections, strains and crack propagation corresponding to both static loads and fatigue loads were registered, and failure mechanisms during and after collapse were observed and analysed. The main conclusions are: different locations and types of failure were registered for ultimate load and fatigue load; the average crack width during static tests was smaller for SCC than for TC; for rebar fatigue failure, no difference was observed between SCC and TC; SCC appeared to have a higher direct compressive fatigue; crack width evolution during fatigue testing was substantially different for SCC and TC.

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“…The result showed that the fatigue life increased and the behavior of failure was analogous to epoxybased methods using for strengthening. Steel-reinforced inorganic polymer tapes consisting of steel fiber tapes with a modulus of elasticity of 210 MPa and an inorganic matrix, Geopolymer, were used as flexural strengthening for beams by Katakalos and Papakonstantinou (2009). The results showed that the fatigue life increased and failure was determined by the main steel tension reinforcement and the steelreinforced inorganic polymer system.…”

Section: Mineral-based Methodsmentioning

confidence: 99%

Examination at a Material and Structural Level of the Fatigue Life of Beams Strengthened with Mineral or Epoxy Bonded FRPs: The State of the Art

Mahal

Blanksvärd

Täljsten

2013

Advances in Structural Engineering

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This paper presents a state of the art review of different material combinations and applications of mineral-based and epoxy-based bonded Fiber Reinforced Polymers (FRP), used for the strengthening of concrete structures subjected to fatigue loading. In this review, models of the fatigue life at the material and structural level are presented. This study examines the mechanical behavior of the FRP-material, surface bonding behavior and concrete beams strengthened under fatigue loading with different types of FRP-systems. The parameters that are investigated are applied load value, time dependent effects, type of strengthened structures (shear, flexural or combined) and the configuration of sheets or plates. The building codes and researchers' recommendations are also discussed. As a result of this review, the reader will obtains an overview of suitable materials and methods for strengthening structures subjected to fatigue loading by referring to the estimated fatigue life of material and strengthening structures at various applied stress levels.

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Fatigue of Reinforced Concrete Beams Strengthened with Steel-Reinforced Inorganic Polymers

Cited by 42 publications

References 29 publications

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

Fatigue resistance of dynamically loaded self-compacting concrete

Examination at a Material and Structural Level of the Fatigue Life of Beams Strengthened with Mineral or Epoxy Bonded FRPs: The State of the Art

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