Analysis of bond splitting failure of deformed bars within structural concrete

Ogura, Noriyuki; Bolander, John E.; Ichinose, Toshikatsu

doi:10.1016/j.engstruct.2007.04.004

Cited by 32 publications

(23 citation statements)

References 5 publications

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“…Depending on the size and configuration of the cross section, the assessed effective concrete area was equal to 65–100% of the total area. Ogura et al numerically identified splitting cracks within the 30 mm cover of 19 mm bars. Ichinose et al experimentally observed a significant reduction of the negative correlation between the bar diameter and the bond strength with an increase of the cover.…”

Section: Tie Testsmentioning

confidence: 99%

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: Tie Testsmentioning

confidence: 99%

Deformation analysis of reinforced concrete ties: Representative geometry

Gribniak

Rimkus

Torres

et al. 2017

Structural Concrete

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“…These empirical approaches are able to account for the tension stiffening effect at the member level but not at the local level. A more generic approach is based on the modeling of local bond stress-slip responses of the steel-to-concrete interface using fictitious spring elements [74][75][76][77]. In a typical FE implementation of this approach, the concrete and the reinforcing steel are represented by two different sets of elements, and node pairs at the interface (i.e.…”

Section: Modelling Of Steel-to-concrete Interfacesmentioning

confidence: 99%

Finite element modeling of reinforced concrete beams exposed to fire

Gao

Dai

Teng

et al. 2013

Engineering Structures

153

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The practical implementation of performance-based fire safety design of reinforced concrete (RC) structures hinges on the availability of accurate numerical simulation tools for the behavior of RC members exposed to fire. This paper presents a three-dimensional (3D) finite element (FE) model for the accurate prediction of both the thermal and the mechanical behavior of RC beams exposed to fire. In this FE model, particular attention is paid to the modeling of interfacial bond-slip behavior between the reinforcing steel and the concrete, an aspect which has rarely been considered by previous numerical studies. Results obtained from this FE model are compared with existing test data to examine the accuracy of the model. This comparison shows that the inclusion of the steel-to-concrete interfacial behavior leads to more accurate predictions of the deflection of RC beams exposed to fire. Predictions from this FE model also allow the complex distribution and evolution of stresses in the reinforcing steel and the concrete to be examined in detail, leading to a better understanding of the local responses of RC beams exposed to fire. The FE model presented in the paper can be used directly in performance-based fire safety design of RC beams; it can also be employed in parametric studies aimed at developing simple design rules.

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“…Bond‐splitting action of ribbed bars has been examined by many researchers, such as Tepfers and Olsson 2, Cairns and Jones 3, 4, Gambarova and Rosati 5, Abrishami and Mitchell 6, Ogura et al . 7, Jendele and Cervenka 8 and Malvar 9, among others. Less attention has been devoted to prestressed concrete elements.…”

Section: Introductionmentioning

confidence: 95%

Cohesive‐frictional model for bond and splitting action of prestressing wire

Gálvez

Benítez

Casati

et al. 2010

Num Anal Meth Geomechanics

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SUMMARYThis paper presents a numerical procedure for bond between indented wires and concrete, and the coupled splitting process of the surrounding concrete. The bond model is an interface, non-associative, plasticity model. It is coupled with a cohesive fracture model for concrete to take into account the splitting of such concrete. Bond between steel and concrete is fundamental for the transmission of stresses between both materials in precast prestressed concrete. Indented wires are used to improve the bond in these structural elements. The radial component of the prestressing force, increased by Poisson's effect, may split the surrounding concrete, decreasing the wire confinement and diminishing the bonding. The combined action of the bond and the splitting is studied with the proposed model. The results of the numerical model are compared with the results of a series of tests, such as those which showed splitting induced by the bond between wire and concrete. Tests with different steel indentation depths were performed. The numerical procedure accurately reproduces the experimental records and improves knowledge of this complex process.

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Analysis of bond splitting failure of deformed bars within structural concrete

Cited by 32 publications

References 5 publications

Deformation analysis of reinforced concrete ties: Representative geometry

Deformation analysis of reinforced concrete ties: Representative geometry

Finite element modeling of reinforced concrete beams exposed to fire

Cohesive‐frictional model for bond and splitting action of prestressing wire

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