Behavior of Steel Fiber-Reinforced High-Strength Concrete Columns under Uniaxial Compression

Paultre, Patrick; Eid, Rami; Langlois, Y.; Lévesque, Y.

doi:10.1061/(asce)st.1943-541x.0000211

Cited by 143 publications

(57 citation statements)

References 15 publications

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“…Though the above equations have also the same basic form as proposed by different authors for confined concrete at ambient temperature, now the coefficient k 2 has been recalibrated on the present test data to predict the correctly postpeak portion of the residual behavior after thermal cycles of the confined concrete. The following expressions are proposed for k 2 :

k_{2} = - 35.45 {[\frac{f_{italicleT}}{f'_{c}}]}^{0.01} + 36.42 for 20 < T \leq 800 °C .

…”

Section: Proposed Modelmentioning

confidence: 92%

An empirical model for confined concrete after exposure to high temperature

et al. 2017

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Summary In this study, constitutive relationships have been developed for confined concrete subjected to elevated temperature to specify the fire‐performance criteria for concrete structures after exposé to fire. This study extends over a total of 63 circular hoop confined concrete specimens that were casted and tested under concentric compression loading after exposure to high temperature. The test variables studied are the yield strength of transverse reinforcement, spacing of the hoop, and exposure to temperatures from ambient to 800°C. It is shown that all of these variables have significant influence on concrete behavior at different temperatures and further an improvement in the thermal resistance of concrete when confined using transverse steel reinforcement. On the basis of experimental results, a model for confined concrete after exposed to high temperature is proposed to predict the results of residual behavior after thermal cycles. The proposed empirical stress‐strain equations are suitable to predict the postfire behavior of confined normal strength concrete in compression. The predictions were found to be in good agreement and well fit with experimental results.

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k_{2} = - 35.45 {[\frac{f_{italicleT}}{f'_{c}}]}^{0.01} + 36.42 for 20 < T \leq 800 °C .

…”

Section: Proposed Modelmentioning

confidence: 92%

An empirical model for confined concrete after exposure to high temperature

et al. 2017

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“…= 3.206 √ ′ + 6.9 (in MPa ) (8) The force in the mid-height of each layer was calculated by using the expression given by Eq. 9:…”

Section: The (P-m) Interactions Analytical Modellingmentioning

confidence: 99%

“…However, the increase in the strength of the concrete is offset by an increase in the brittleness of the concrete [6][7][8] which may expose the column to a sudden failure without prior notice. As such, concerns may be raised of utilizing such concrete in structural applications and may limit the widespread utilization of RPC especially in seismically active areas.…”

Section: Introductionmentioning

confidence: 99%

Axial-flexural interaction diagram of RPC columns reinforced with steel fibres

Al-Tikrite

Hadi

2019

Structures

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This paper presents analytical modelling of the axial-flexural behaviour of Reactive Powder Concrete (RPC) columns reinforced with and without steel fibres of different types (industrial and waste) in individual and hybrid forms. An analytical stress-strain model for unconfined RPC was used for the analysis of the axial loads and bending moments of the fibrous RPC columns. The layer-by-layer numerical integration method was used to calculate the axial load and bending moments in this study. The analytically developed axial load-bending moment (P-M) interaction diagrams were validated by using experimental results from the literature. A para-metric study was carried out to investigate the influence of the properties of steel fibres on the axial-flexural behaviour of fibrous RPC columns. It was found that the analytical unconfined stress-strain model used in this study well estimates the maximum axial loads and the maximum bending moments of the RPC columns reinforced with and without different types of steel fibres. Also, the influence of the properties of steel fibres is more pronounced at eccentric and flexural loading

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“…Inelastic deformability of reinforced concrete columns is essential for overall strength and stability of structures during a strong earthquake. The inelastic deformation of the structural column can be significantly achieved by confining the concrete core [1], or by increasing the matrix bonding of concrete materials such as fiber concrete [2,3]. On the other hand, the current development of concrete technology also leads and prioritized to the eco-friendly concrete.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Geopolymer Concrete Confined by Circular Hoops

Arifin¹,

Djaeni²,

Utari³

2018

MATEC Web of Conferences

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This paper discusses the behavior of geopolymer concrete subjected to passive confinement under compression loads. The confinement is induced by the use of lateral hoops, assembled from un-deformed reinforcing bars. To compare the effect of confinement, identical specimens were produced using conventional concrete with the similar concrete compressive strength. The cylinder specimens were 100 mm in diameter and 200 mm in height, and the hoops were placed on the outer most fibers of the cylinders, perpendicular to the line of loading, with no concrete cover. The parameters analyzed in this study were the steel bar to concrete volumetric ratio, the hoop spacings and the steel yield stresses. The experimental results show that unconfined geopolymer concrete were very brittle compared to the unconfined Portland cement concrete. The strength enhancement (K value) of the confined geopolymer concrete was higher than K value of Portland cement concrete. Confined geopolymer concrete also has better deformability compared to the confined Portland cement concrete. The average confinement effectiveness of geopolymer concrete also has a higher value than that commonly used in the Indonesian Concrete Standard (SNI), that is 4.1. The results were further assessed to the most recent experimental test results conducted in this area.

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Behavior of Steel Fiber-Reinforced High-Strength Concrete Columns under Uniaxial Compression

Cited by 143 publications

References 15 publications

An empirical model for confined concrete after exposure to high temperature

An empirical model for confined concrete after exposure to high temperature

Axial-flexural interaction diagram of RPC columns reinforced with steel fibres

Behavior of Geopolymer Concrete Confined by Circular Hoops

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