Constitutive Model of Steel Fibre Reinforced Concrete Subjected to High Temperatures

Blesak, Lukas; Goremikins, Vadims; Wald, František; Sajdlová, Tereza

doi:10.14311/ap.2016.56.0417

Cited by 12 publications

(5 citation statements)

References 16 publications

(18 reference statements)

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“…For particular fibre volume ratios and compressive strengths, the formation of several cracks in the pure bending zone complicates measurement of the crack opening and hampers assessment of the deflections (Gopalaratnam 1995). Both approaches, nevertheless, are capable of predicting post-cracking behaviour of SFRC (Blesak et al 2016;Groli, Caldentey 2016;Iqbal et al 2015); however, addition of bar reinforcement complicates assessment of the residual effect of the fibres (Gribniak et al 2012;Sanchez-Aparicio et al 2015). The moment-curvature relationships of the full-scale beams are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Experimental investigation of cracking behaviour of concrete beams reinforced with steel fibres produced in Lithuania

Meškėnas

Gribniak

Kaklauskas

et al. 2017

The Baltic Journal of Road and Bridge Engineering

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Concrete is the most widely used material for bridge structures in Lithuania. A case study performed by the authors revealed that application of fibres might improve serviceability of such structures. However, adequacy of prediction of the post-cracking behaviour of steel fibre reinforced concrete might be insufficient. The latter issue is closely related to the assessment of the residual strength of steel fibre reinforced concrete. The residual strength, in most cases, is considered as a material property of the cracked concrete. However, in the prediction of the structural behaviour of the concrete members with bar reinforcement, a straightforward application of the residual strength values assessed by using standard techniques might lead to incorrect results. The present study deals with the post-cracking behaviour of structural elements made of concrete with aggregates and fibres provided by Lithuanian companies. Test results of three full-scale and sixteen standard steel fibre reinforced concrete beams with two different content of fibres (23.6 kg/m3 and 47.1 kg/m3) are presented. The full-scale beams were reinforced with high-grade steel bars. Effectiveness of the application of the minimum content of the fibres in combination with bar reinforcement was revealed experimentally.

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Section: Resultsmentioning

confidence: 99%

Experimental investigation of cracking behaviour of concrete beams reinforced with steel fibres produced in Lithuania

Meškėnas

Gribniak

Kaklauskas

et al. 2017

The Baltic Journal of Road and Bridge Engineering

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“…The mechanical behavior of fibrous concrete after burning up to a temperature of 900 o C by Antonius et al [15] and Purwanto et al [16] proposes a constitutive equation for mechanical behavior but is however limited to the volume of the fiber fraction of 0.5%. Bezerra et al [17] and Chen et al [18] investigated the mechanical behavior of steelfibrous concrete at high temperatures where the burning temperature reached 500 o C. On the other hand, an analysis simulation of fibrous concrete based on a numerical method that was validated against experimental results and revealed that postburn fibrous concrete tends to experience a trend of decreasing strength but its ductility increases if the temperature applied is more excessive [19]. Furthermore, Bezerra et al [17] and Zhang et al [20] reveal the residual strength of steel-fibrous concrete at various temperatures is more superior than the residual strength of plain concrete.…”

Section: Introductionmentioning

confidence: 99%

Stress-Strain Behavior of Normal and High-Strength Steel-Fiber Concrete Post Burning

Purwanto¹

2021

GEOMATE

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This paper presents the results of experimental testing on steel fibrous concrete cylinder specimens after being burned for a certain period of time. The purpose of this research is to explore and develop an analytical expression on the stress-strain behavior of steel-fiber concrete by considering various variables. Precisely, the variables reviewed are the compressive strength of concrete which is defined as concrete with normal-strength, medium-strength and high-strength; the volume of fiber fraction in the concrete, namely 0%, 1% and 2%; and burning time for 1 hour, 2 hours and 3 hours. All cylindrical specimens measuring 100 x 200 mm were tested against uniaxial loads. The experimental results showed that all the fiber-free specimens had experienced a decrease in strength with increasing firing time. Normal-strength concrete specimens lose strength by 30-35% after burning for 1 hour or 2 hours, and the strength degradation increases to 60% at 3 hours after burning. Medium-strength concrete specimens lost 10% strength after being burned for 1 hour , then lost 30% and 60% strength after 2 hours and 3 hours of burning, respectively. High-strength concrete specimens lose 10% strength if burned for 1 hour, then the strength is lost 20% and 55% after burning 2 hours and 3 hours, respectively. Another result is a trend of increasing peak strain of concrete with increasing burning time. In this paper, an analytical expression of stress-strain post-burning steel-fibrous concrete is developed. The comparison results show that the analytical expression is able to predict the experimental results of normal and high-strength steel-fiber concrete with various variations in the volume of the steel fiber fraction effectively.

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“…Because of the properties of the burnt concrete, including the duration and the temperature of the fire are very important to recognize in order to ensure the level of security of after burnt structure. also been extensively investigated [9][10][11][12]. Similarly, the application of fibrous concrete at high temperatures has been carried out [13].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Compressive Strength of Gunny Sack Fiber Concrete under High-Temperatures

Cholida

Purwanto

Purwanti

2020

JACEE

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Gunny sack fiber concrete has not been explored especially the behavior under high temperatures. This paper presents the results of an experimental investigation of gunny sack fibrous concrete (percentage of 0.5% of volume) given a monotonic- compressive load. A number of cylindrical test specimens were made which consisted of control specimens and which were incinerated at temperatures of 300oC, 600oC and 900oC. The concrete -compressive strength was designed with three variations of the cement water ratio to get the compressive strength of a standard cylinder with normal, medium and high -quality compressive strength categories. Experimental results show that normal to high quality concrete can be produced with gunny sack fiber substitution. The compressive strength of the gunny sack fiber concrete decreased significantly from the control specimen to the specimen which was burned at 300oC. The loss of compressive strength from the control specimens to the post-burn specimens of medium quality and high -quality of gunny sack fiber concrete was the same compared with the loss of compressive strength of normal- quality concrete. This study also carried out a comparison of the degradation of the compressive strength of steel fibrous concrete with gunny sack fiber in post-burn conditions.

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Constitutive Model of Steel Fibre Reinforced Concrete Subjected to High Temperatures

Cited by 12 publications

References 16 publications

Experimental investigation of cracking behaviour of concrete beams reinforced with steel fibres produced in Lithuania

Experimental investigation of cracking behaviour of concrete beams reinforced with steel fibres produced in Lithuania

Stress-Strain Behavior of Normal and High-Strength Steel-Fiber Concrete Post Burning

Investigation on the Compressive Strength of Gunny Sack Fiber Concrete under High-Temperatures

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