Analysis of flexural and shear resistance of ultra high performance fiber reinforced concrete beams without stirrups

Kodur, Venkatesh; Solhmirzaei, Roya; Agrawal, Ankit; Aziz, Esam M.; Soroushian, Parviz

doi:10.1016/j.engstruct.2018.08.010

Cited by 66 publications

(39 citation statements)

References 43 publications

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“…On the other side it was observed that ACI 318–11 code predicts close to experimental values but higher than CSA A23.3–04 and IS456‐2000 codes due to the fact that ACI considers less factor of safety for materials when compared to other two codes for effective use of material strength. Similar test results on beams without stirrups obtained by different authors 26–28 have been compared with theoretical values of same codes used in present study and shown in Table 8. It was observed that theoretical ultimate moment values calculated for their work, ACI 318–11 code predicts higher values compared to other two codes due to above said reason.…”

Section: Resultssupporting

confidence: 55%

Role of smart concrete in strain sensing and structural properties of reinforced concrete beam

Cholker

Tantray²

2020

Structural Concrete

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Present work demonstrates the experimental investigation on four large scale reinforced concrete (RC) beams cast with and without smart concrete to study strain and damage sensing properties (for health monitoring), effect of carbon fiber (CF) on ultimate strength, crack pattern, and stiffness response under monotonically increased loading. A total of four beams, one without and three with smart concrete (CF‐based concrete) having similar dimensions, similar percentage of reinforcement, similar aspect ratio, same grade of steel but having variable strengths of concrete were cast and tested for evaluating above said properties. Micro CFs were placed only in mid‐span region for a length of 350 mm and a depth of 55.5 mm at top and bottom surface of the beam from economical point of view for health monitoring. From obtained experimental results, it was found that RC beam embedded with smart concrete can be used for structural health monitoring (SHM) and obtained fractional change in resistance of smart concrete can be corelated with compressive strain in concrete and tensile strain in steel up to good extent. Along with strain and damage sensing properties, the effect of smart concrete on structural properties is also reported and it was found that, apart from showing positive results for SHM, it also increases ultimate strength carrying capacity of the same RC beam. Also the experimentally obtained ultimate strength values were compared with theoretical predicted values using IS456‐2000, ACI 318–11, and CSA A23.3–04 codes.

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Section: Resultssupporting

confidence: 55%

Role of smart concrete in strain sensing and structural properties of reinforced concrete beam

Cholker

Tantray²

2020

Structural Concrete

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“…They were tested in a specially designed setup outside the furnace, under simple supports and a similar loading configuration as applied during the fire test, ie, two point loads, applied on the top face of the beam through a displacement controlled actuator. A displacement rate of 2 mm per minute was adopted in these residual strength tests …”

Section: Experimental Studymentioning

confidence: 99%

Residual response of fire‐damaged high‐strength concrete beams

Agrawal

Kodur

2019

Fire and Materials

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Summary This paper presents results from an experimental study on residual capacity of fire‐damaged high‐strength concrete (HSC) beams. Four reinforced concrete (RC) beams, fabricated with HSC, were first subject to structural loading and fire exposure with a distinct cooling phase and then loaded to failure upon cooldown to ambient conditions to evaluate residual capacity. Temperatures, deflections, and spalling in the beams were monitored during heating and cooling phases of fire exposure. Further, residual capacity, strains at critical section, and crack patterns (failure mode) of fire‐damaged beams were recorded during residual capacity tests. Results from experiments indicate that the load level during fire exposure, duration of heating phase, rate of cooling, extent (type) of spalling, and duration of postcooling storage influence residual deformations and also residual capacity of RC beams. Further, fire‐damaged HSC beams can recover 40% to 70% of their flexural capacity with respect to their room temperature design capacity provided they survive the entire duration of fire exposure.

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“…Ever since the beginning of the usage of reinforced concrete structures, various experimental studies have been conducted by the researchers on the basis of element. Numerous experimental studies have been conducted on reinforced concrete beams [18,[23][24][25][26][27][28][29][30][31][32][33][34]. These studies aimed to determine the shear resistance by using PP fibers used in reinforced concrete structures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Stirrup Spacing and Polypropylene Fiber Ratio on Behavior of Reinforced Concrete Beams

Ünal¹,

Cengiz²,

Kamanli³

2021

Period. Polytech. Civil Eng.

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In this study, the effect of the change of stirrup ratio and polypropylene (PP) fiber ratio on the behavior of reinforced concrete beams was investigated. The variables of this study consisting of without stirrup, spacing up to 20 %, 40 % and 80 % of beam depth as stirrup spacing and 0.125 % and 0.500 % of the weight of reinforced concrete beam were used as PP fiber ratios. In the context of experimental study, 1/2 scaled 12 reinforced concrete beams were tested with 4-point bending mechanism. In the light of the obtained data, the load-displacement, stiffness and energy absorption graphs were plotted. The results were interpreted comparatively. According to the results, it is observed that the PP fiber additive significantly changed the behavior of the reinforced concrete beams, and the fiber effect decreased in proportion to the increase of the stirrup rate. It has been observed that the cracks spread more to the beam surfaces with the increase of PP fibers. In addition, the increase in the fiber ratio especially in the non-stirrup beams increases the bending capacity.

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Analysis of flexural and shear resistance of ultra high performance fiber reinforced concrete beams without stirrups

Cited by 66 publications

References 43 publications

Role of smart concrete in strain sensing and structural properties of reinforced concrete beam

Role of smart concrete in strain sensing and structural properties of reinforced concrete beam

Residual response of fire‐damaged high‐strength concrete beams

Effect of Stirrup Spacing and Polypropylene Fiber Ratio on Behavior of Reinforced Concrete Beams

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