Effect of arrangement of tensile reinforcement on flexural stiffness and cracking

Gribniak, Viktor; Caldentey, Alejándro Pérez; Kaklauskas, Gintaris; Rimkus, Arvydas; Соколов, А. А.

doi:10.1016/j.engstruct.2016.06.026

Cited by 60 publications

(37 citation statements)

References 17 publications

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“…It also relies on the geometry (length) of the tie. Considering the cracking behavior, experimental results obtained by the authors and other researchers (e.g., References , and ) indicated that the crack pattern is dependent on geometry of the specimen and arrangement of the reinforcement. By means of an extensive experimental program (54 ties of different geometry and loading layout were tested), a representative geometry of the samples that allows to assess the end effect is identified.…”

Section: Introductionmentioning

confidence: 92%

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Deformation analysis of reinforced concrete ties: Representative geometry

Gribniak

Rimkus

Torres

et al. 2017

Structural Concrete

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Regardless of the simplicity of the test layout, interpretation of the tensile test results may be inadequate. Typically, a test of the reinforced concrete tie provides measurements of average deformations of the internal reinforcing bar and the concrete surface. The experimental evidence, however, often contradicts with the general assumption of the similarity of mean strains of the reinforcement and concrete. Analysis of the sources influencing the scatter of the experimental results motivated this investigation of the representativeness of the specimens. In this study, the representativeness is understood as a property of a tie to isolate the investigated parameters (e.g., the deformation components) from other uncontrolled effects typical of test with limited sample sizes. This study aims at determining the representative geometry of the test samples that would enable the reduction of the end effect. A consistent procedure is proposed for identifying the cracking parameters of the ties with different testing layouts.

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Section: Introductionmentioning

confidence: 92%

“…Test results indicated that the cover correlates with the scatter of average deformations of the ties. An example of such effect is presented in Figure that shows the tensile load‐average strain diagrams of twin‐specimens with 60 × 60 mm and 100 × 100 mm cross sections.…”

Section: Tie Testsmentioning

confidence: 99%

Deformation analysis of reinforced concrete ties: Representative geometry

Gribniak

Rimkus

Torres

et al. 2017

Structural Concrete

Self Cite

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“…Maximum crack spacing as a function of the effective reinforcement ratio—Tests results from Gribniak et al (Specimens S1‐2 and S2‐3) compared with theoretical predictions of Eurocode 2, Model Code 2010 and Debernardi and Taliano Model . The variation of effective reinforcement ratio is obtained playing on the number of steel bars…”

Section: Code Formulationsmentioning

confidence: 99%

A review of literature and code formulations for cracking in R/C members

Lapi

Orlando

Spinelli

2018

Structural Concrete

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Cracking in R/C members is a complex phenomenon characterized by high scattering, mainly affected by concrete in tensile zone. The aim of this paper is to evaluate the effectiveness of formulas for crack width prediction developed in last decades. First, an historical review of available literature models is presented and discussed. Second, the progress and missteps, which have characterized the development of international code provisions, are shown. Finally, a comprehensive comparison between predicted crack widths and experimental data is performed. Some formulas more than others provide mean values of crack width in good agreement with experimental data; nevertheless, predictions are always very scattered, as ratios between theoretical and experimental values have a coefficient of variation not lower than 30%. Results show that the prediction capacity does not necessarily increase as the cracking model is refined.

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“…It should be noted that the typical tensile elements with a bar at the central position might not be representative for all cases due to the unrealistically simplified loading condition: the load is applied directly to the bar, rather than the uniformly to the whole cross-section. Moreover, such elements are incapable to reflect the deformation behavior associated with group effects of closely spaced reinforcement bars [8,24,25]. Hence, the modeling results would not be representative of the behavioral characteristics in the tension zone of real structural members, where multiple bars exist.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of strain gradient in tensile concrete prisms reinforced with multiple bars

Gribniak

Jakubovskis

Rimkus

et al. 2018

Construction and Building Materials

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This work is a continuation of the ongoing research on deformation behavior of reinforced concrete elements under tension. The previous studies have revealed that deformation behaviors of elements reinforced with multiple bars and the traditional prismatic members reinforced with a center bar are essentially different. The latter layout, though typical of laboratory specimens, could not represent the norm of structures in real-life. Thus, a new test methodology to investigate the strain distribution in concrete prismatic members reinforced with multiple bars subjected to axial tension is devised. Prismatic concrete specimens with different reinforcement configurations were fabricated and tested using the proposed setup. Deformation behavior of the specimens is modeled with a tailor-designed bond modeling approach for rigorous finite element analysis. It is revealed that the average deformations of the concrete could be different from the prevailing approach of average deformations of the steel, and are dependent on the reinforcement configurations. Therefore, the efficiency of concrete in tension should be carefully taken into account for rational design of structural elements. The study endorses promising abilities of finite element technique as a versatile analysis tool whose full potential is to be revealed with the advent of computer hardware.

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Effect of arrangement of tensile reinforcement on flexural stiffness and cracking

Cited by 60 publications

References 17 publications

Deformation analysis of reinforced concrete ties: Representative geometry

Deformation analysis of reinforced concrete ties: Representative geometry

A review of literature and code formulations for cracking in R/C members

Experimental and numerical analysis of strain gradient in tensile concrete prisms reinforced with multiple bars

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