An improved Lubliner strength model based on Ottosen failure criterion for concrete under multiaxial stress state

Lei, Bo; Qi, Taiyue; Li, Yan; Qin, Shaojie

doi:10.1002/suco.202100450

Cited by 6 publications

(2 citation statements)

References 72 publications

(134 reference statements)

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“…For the eccentricity (ϵ), ratio of the compressive strength under biaxial loading to uniaxial (f b0 =f c0 ), and the shape factor (K c ) the default values, 0.1, 1.16, and 0.667, respectively, as selected by past researchers were considered. [49][50][51][52][53][54] In CDP model, the compressive behavior of concrete can be defined in tabulated form. It consists of stress (σ c ), inelastic strain (ε in c ) corresponding to stress value, and damage parameter (d c ).…”

Section: Unconfined Concretementioning

confidence: 99%

“…When

ψ = 33

and

μ = 0.0015

, the model predicted the behavior with good accuracy and reasonable computation time. For the eccentricity (

ϵ

), ratio of the compressive strength under biaxial loading to uniaxial (

f_{b 0} / f_{c 0}

), and the shape factor ( K c ) the default values, 0.1, 1.16, and 0.667, respectively, as selected by past researchers were considered 49–54 …”

Section: Finite Element Modelingmentioning

confidence: 99%

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Numerical evaluation of axial compressive behavior of hollow concrete columns reinforced with GFRP bars and spirals

Tahir

Karam

Hassam

et al. 2023

Structural Concrete

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With the advancement in the concrete technology, the application of precast concrete elements in the buildings and road infrastructures is increasing very rapidly. One of such applications is the use of precast hollow concrete elements in the bridge construction. As the conventional steel reinforcement is highly susceptible to corrosion, the use of non‐corrosive reinforcement in precast hollow concrete piers and piles of bridges could be a good option for the durability of bridge structures., In this regard, hollow concrete columns reinforced with fiber‐reinforced polymer (FRP) have been considered as a potential solution to overcome the structural deterioration due to corrosion. In the past, limited studies have been carried out on hollow concrete columns reinforced with FRP, consequently, the behavior of such columns is not fully understood. Therefore, to comprehensively evaluate the behavior of hollow concrete columns for various design parameters, a finite element model (FEM) was developed in this study using the commercial tool “Abaqus”. The model was developed and verified based on the experimental results of studies conducted by two independent research groups on circular concrete columns. The proposed model well predicted the peak loads with an error less than 10% and the failure modes of the tested columns. The verified constitutive relation and establishing method were further employed to conduct parametric evaluations to observe the influence of different parameters, such as inner‐to‐outer diameter ratio, longitudinal reinforcement ratio, lateral reinforcement ratio, and concrete strength, on the behavior of hollow concrete columns. Parametric analyses show that reduced inner‐to‐outer diameter ratio and larger longitudinal or lateral reinforcement may lead to higher peak load and confined concrete strength. Finally, based on the experimental and FEM evaluations, the strength prediction equations were developed for the analysis and design of hollow concrete columns reinforced with GFRP bars.

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Section: Unconfined Concretementioning

confidence: 99%

“…When

ψ = 33

and

μ = 0.0015

, the model predicted the behavior with good accuracy and reasonable computation time. For the eccentricity (

ϵ

), ratio of the compressive strength under biaxial loading to uniaxial (

f_{b 0} / f_{c 0}

), and the shape factor ( K c ) the default values, 0.1, 1.16, and 0.667, respectively, as selected by past researchers were considered 49–54 …”

Section: Finite Element Modelingmentioning

confidence: 99%

Numerical evaluation of axial compressive behavior of hollow concrete columns reinforced with GFRP bars and spirals

Tahir

Karam

Hassam

et al. 2023

Structural Concrete

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Experimental and analytical investigation of a model towards predicting the compressive stress–strain behavior of Graded Glass Fiber Reinforced Concrete (GGFRC) using fiber reinforcing index

Kasagani,

Prathipati,

Koniki

et al. 2024

Structural Concrete

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The stress–strain behavior of graded glass fiber reinforced concrete (GGFRC) is a crucial factor in its performance and appropriateness for diverse applications. In the present study, experimental and analytical methods were used to develop a model for the stress–strain behavior of GGFRC under uniaxial loading. The experimental program is designed to investigate the impact of mono glass fibers (3, 6, 12, and 20 mm) with varying volume fractions (0.1%–0.5%) and graded glass fibers (combinations of 3 + 6 + 12 + 20 mm) on the behavior of concrete of M50 grade. By grading glass fiber lengths in the concrete, GGFRC's pre‐peak strength and post‐peak deformation have increased, allowing the composite to control the various scales of cracking. A uniaxial compressive stress–strain model has been developed utilizing the fiber reinforcing index to predict the stress–strain curves of GGFRC in compression. The fiber reinforcing index, which is a measure of the quantity of fiber reinforcement in the material, is used as a variable in the current model to observe how it impacts the material's behavior. This would help evaluate the material's behavior under uniaxial compressive loading conditions and then use that data to develop a mathematical model that can predict the material's response under other conditions. Finally, it can be concluded that there is a significant correlation between the experimental results and the proposed analytical model.

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Confinement-dependent failure criterion for high-strength concrete in multiaxial stress states

Wang

Cheng

2023

Construction and Building Materials

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An improved Lubliner strength model based on Ottosen failure criterion for concrete under multiaxial stress state

Cited by 6 publications

References 72 publications

Numerical evaluation of axial compressive behavior of hollow concrete columns reinforced with GFRP bars and spirals

Numerical evaluation of axial compressive behavior of hollow concrete columns reinforced with GFRP bars and spirals

Experimental and analytical investigation of a model towards predicting the compressive stress–strain behavior of Graded Glass Fiber Reinforced Concrete (GGFRC) using fiber reinforcing index

Confinement-dependent failure criterion for high-strength concrete in multiaxial stress states

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