A fracture mechanics-based approach to modeling the confinement effect in reinforced concrete columns

Tung, Nguyen Duc; Tue, Nguyen Viet

doi:10.1016/j.conbuildmat.2015.11.031

Cited by 6 publications

(5 citation statements)

References 41 publications

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“…Many theoretical models have been developed to describe the confinement effect on the behavior of RC columns, for example, in the publications. 17,[22][23][24] In Ozbakkaloglu et al's work, 24 the review and assessment of stressstrain models for Fiber Reinforced Polymer (FRP)-confined concrete in circular sections were summarized. Desprez et al 25 presented a simplified stress-strain model suitable for monotonic and cyclic loading capable of predicting the FRP's effect on RC columns.…”

Section: Mechanical Behavior Of Confined Rc Columnsmentioning

confidence: 99%

“…As known, to improve the strengths especially the axial compressive strength and ductility capacity, transverse reinforcements were often adopted as the lateral confinement in RC columns. There are many engineering materials that have been utilized for the confinement of RC columns, such as steels (stirrups, steel tubes, section steel, etc. ), and various fiber‐reinforced materials (carbon fiber, steel fiber, and glass fiber).…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to the behavior of a concrete specimen in the triaxial compression test, the confinement in RC columns is a passive phenomenon. The passive confining stress in RC columns depends decisively on the interaction between the amount of the transverse reinforcement and deformation capacity of confined concrete in the lateral direction . As known, the interaction between the transverse reinforcement and concrete is dependent on the ratio of transverse reinforcement and the set of concrete cover.…”

Section: Introductionmentioning

confidence: 99%

“…Many theoretical models have been developed to describe the confinement effect on the behavior of RC columns, for example, in the publications 17,22‐24 . In Ozbakkaloglu et al's work, the review and assessment of stress–strain models for Fiber Reinforced Polymer (FRP)‐confined concrete in circular sections were summarized.…”

Section: Introductionmentioning

confidence: 99%

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Size effect tests of stocky reinforced concrete columns confined by stirrups

Jin

et al. 2017

Struct Concrete

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The paper deals with an experimental investigation of stocky reinforced concrete (RC) columns confined by stirrups with a slenderness ratio of 3. A total of 24 columns were designed and tested. In the tests, the confining action and the size effect for the columns with circular and square cross sections were studied, and the effects of stirrup ratio and concrete cover were also explored. The maximum structural sizes for the circular and squared columns were respectively 576 mm in diameter and 600 mm in cross-sectional width. The test observations indicate that, increasing the stirrup ratio could make the enhancement of the nominal strength and improvement of ductility capacity. At the same stirrup ratios and crosssectional sizes, both the nominal strength of the circular columns is higher and the deformation capacity is larger than those of the square columns. Overall, the failure of the RC columns with a lower stirrup ratio, without cover and having square cross section is more brittle, exhibiting a stronger size effect. In addition, the nominal compressive strengths of all the tested columns are in good agreement with the size effect law (SEL) proposed by Bažant. K E Y W O R D Scircular cross section, concrete cover, confined RC column, nominal compressive strength, size effect, square cross section, stirrup ratio

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Section: Mechanical Behavior Of Confined Rc Columnsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Size effect tests of stocky reinforced concrete columns confined by stirrups

Jin

et al. 2017

Struct Concrete

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“…K.A.Piradov and N.V. Savickij [3] note that there is no theoretically justified approach for the design of reinforced concrete structural elements with cracks at the moment (reinforced concrete elements, especially without reinforcement prestressing, usually contain cracks at design loads), and current design method (safety factors method or limit state method from 1955) is based on a number of theoretically unsubstantiated empirical coefficients. Fracture mechanics [4,5,6] can be successfully applied for design of reinforced concrete elements with cracks. The relationship between fracture mechanics and reliability theory can be a powerful tool for evaluating the structural safety of reinforced concrete elements.…”

Section: Introductionmentioning

confidence: 99%

A Probablistic Approach to Evaluation of the Ultimate Load on Flexural Rc Element on Crack Length

Solovyev¹

2020

IJCCSE

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The fracture mechanics of concrete and reinforced concrete is a promising direction in the development of methods for reinforced concrete structural elements design and inspection. At the same time, probabilistic methods of design and behavior analysis of structural elements are of particular interest. The article describes a probabilistic approach to load-bearing capacity and reliability analysis of flexural reinforced concrete elements based on the crack length criterion. The functional relationship between the critical stress intensity coefficient of concrete and the design compressive strength of concrete is given. The article presents a method for the reliability analysis of flexural reinforced concrete elements at the operational stage with limited statistical data about the critical stress intensity coefficient of concrete. The ultimate value of the failure probability (or reliability index) should be set for each object individually based on the value of the acceptable risk.

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