Constitutive behaviour of confined fibre reinforced concrete under axial compression

Ramesh, K.; Seshu, D. Rama; Prabhakar, M.

doi:10.1016/s0958-9465(02)00051-3

Cited by 48 publications

(25 citation statements)

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“…Recently some studies have been reported, where various types of fibres have been used along with lateral confining steel to improve the post peak performance of reinforced concrete columns (Foster and attard 2001, Ramesh et al 2003, Paultre et al 1996. It has been shown that columns cast with suitable randomly distrib-uted discrete fibres show superior performance to comparable specimens cast without fibres, particularly with respect to post failure ductility.…”

Section: Introductionmentioning

confidence: 99%

Compressive Stress-Strain Behavior of Small Scale Steel Fibre Reinforced High Strength Concrete Cylinders

Bhargava

Sharma

Kaushik

2006

ACT

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An experimental investigation was carried out to generate the complete stress-strain curves of steel fibre reinforced high strength concrete under axial compression. The experimental program consisted of testing 100 x 200 mm concrete cylinders. The experimental variables of the study were concrete strength levels (58.03 MPa and 76.80 MPa), volume fractions (0.5% to 2.0%) and aspect ratios (20 and 40) of flat crimped steel fibres. The effect of the mixed aspect ratio of fibres on the stress-strain behavior of steel fibre high strength concrete was also studied by blending short and long fibres. The effects of these variables on the stress-strain curves are presented and discussed. The results indicate that high strength concrete can be made to behave in a ductile manner by the addition of suitable fibres. It is concluded that short fibres are more effective in controlling early cracking, thereby enhancing the strength of the composite, whereas long fibres are more effective in providing post peak toughness. Concrete strength seemed to have an adverse effect on the deformability of fibre reinforced high strength concrete. Based on the test data obtained, a simple model is proposed to generate the complete stress-strain relationship for steel fibre reinforced high strength concrete. The proposed model has been found to give a good representation of the actual stress-strain response.

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Section: Introductionmentioning

confidence: 99%

Compressive Stress-Strain Behavior of Small Scale Steel Fibre Reinforced High Strength Concrete Cylinders

Bhargava

Sharma

Kaushik

2006

ACT

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“…Studies show that, internal steel fibers form bridges across the crack of concrete and thus become effective in delaying and arresting crack propagation. [7,9,[13][14][15][16][17][18][19][21][22][23]25]. Benefitting from this improved properties of concrete, FRP-confined steel fiber reinforced concrete (FRPconfined SFRC) may form an attractive composite system that is capable of overcoming the aforementioned shortcoming seen in FRP-confined concrete.…”

Section: Introductionmentioning

confidence: 99%

Axial Capacity Enhancement of CFRP Confined Columns Made of Steel Fiber Reinforced Concrete

Muktadir¹,

Islam²,

Reza³

2017

IOSR JMCE

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Abstract:Results of the experimental study on the axial compressive behavior of steel fiber reinforced concrete (SFRC) wrapped with fiber reinforced polymer (FRP) have been presented in this paper. A total of 18 concrete cylinders were tested under axial compression. The effects of steel fiber parameters were investigated which includes fiber aspect ratio (AR) and fiber volume fraction (VF). The concrete cylinders were divided into groups of confined and unconfined ones. In accordance with previous study, it was found that, FRP confined cylinders showed greater axial stress than that of unconfined specimens. Although the presence of steel fiber increases the peak axial stresses for both confined and unconfined group of specimens, but no significant change of peak axial stress (and peak strain) has been observed in both confined and unconfined group due to increase of fiber volume ratio. But with the increase of fiber aspect ratio, the peak axial stresses of both unconfined and FRPconfined cylinders were found to slightly decrease. It was also observed that, concrete specimens reinforced with internal steel fiber absorbed much higher energy than that of unreinforced ones.

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“…Most of the previous experiments as well as formulations have been limited to uniaxial tension ͑Li et al 1998; Nataraja et al 1999;Ramesh et al 2003͒. Such knowledge, however, is insufficient for structural design in general.…”

Section: Introductionmentioning

confidence: 99%

“…Such knowledge, however, is insufficient for structural design in general. Recently, though, valuable multiaxial loading experiments have been reported by Yin et Ramesh et al ͑2003͒, and Kabele ͑2004͒. Nevertheless, the existing models are still unable to capture realistically the experimental evidence from multiaxial testing.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the existing models are still unable to capture realistically the experimental evidence from multiaxial testing. They describe well only specific loading conditions, mostly uniaxial tension ͑Kullaa 1994; Pizzari et al 2000;Li 2001͒ anduniaxial compression ͑Nataraja et al 1999;Ramesh et al 2003͒. This prevents applications in finite element programs.…”

Section: Introductionmentioning

confidence: 99%

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Microplane Model M5f for Multiaxial Behavior and Fracture of Fiber-Reinforced Concrete

et al. 2007

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Despite impressive advances, the existing constitutive and fracture models for fiber-reinforced concrete ͑FRC͒ are essentially limited to uniaxial loading. The microplane modeling approach, which has already been successful for concrete, rock, clay, sand, and foam, is shown capable of describing the nonlinear hardening-softening behavior and fracturing of FRC under not only uniaxial but also general multiaxial loading. The present work generalizes model M5 for concrete without fibers, the distinguishing feature of which is a series coupling of kinematically and statically constrained microplane systems. This feature allows simulating the evolution of dense narrow cracks of many orientations into wide cracks of one distinct orientation. The crack opening on a statically constrained microplane is used to determine the resistance of fibers normal to the microplane. An effective iterative algorithm suitable for each loading step of finite element analysis is developed, and a simple sequential procedure for identifying the model parameters from test data is formulated. The model allows a close match of published test data on uniaxial and multiaxial stress-strain curves, and on multiaxial failure envelopes.

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Constitutive behaviour of confined fibre reinforced concrete under axial compression

Cited by 48 publications

References 1 publication

Compressive Stress-Strain Behavior of Small Scale Steel Fibre Reinforced High Strength Concrete Cylinders

Compressive Stress-Strain Behavior of Small Scale Steel Fibre Reinforced High Strength Concrete Cylinders

Axial Capacity Enhancement of CFRP Confined Columns Made of Steel Fiber Reinforced Concrete

Microplane Model M5f for Multiaxial Behavior and Fracture of Fiber-Reinforced Concrete

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