Compressive behaviour of concrete at high strain rates

Bischoff, Peter H.; Perry, S. H.

doi:10.1007/bf02472016

Cited by 1,228 publications

(610 citation statements)

References 34 publications

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“…The key parameters of the plasticity model are as follows: the dilation angle, eccentricity, ratio of the biaxial compression strength to the uniaxial compression strength of concrete, ratio of the second stress invariant on the tensile meridian to that on the compressive meridian and viscosity parameter are 30°, 0.1, 1.16, 0.667, and 0.0001, respectively [19]. Regarding the dynamic modulus of elasticity, Bischoff and Perry noted the confusion about whether the initial tangent modulus should change with the strain rate because of the confliction from different experimental results [2]. In this study, the modulus of elasticity is assumed to be constant for an effective numerical implementation in ABAQUS and is equal to c 4730 f by ACI 318 [20], where fc (N/mm 2 ) is the compressive cylinder strength of concrete under a quasi-static load.…”

Section: Fig 2 -Illustration Of the Finite Element Modelmentioning

confidence: 99%

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Finite Element Analysis of the Behaviour of Reinforced Concrete Columns Confined by Overlapping Hoops Subjected to Rapid Concentric Loading

Zeng¹

2017

CEJ

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The strain rate sensitivity of concrete material was discovered approximately one hundred years ago, and it has a marked effect on the behaviour of concrete members subjected to dynamic loadings such as strong earthquake and impact loading. Because of the great importance of the confined reinforced concrete (RC) columns in RC structures, the dynamic behaviour of the columns induced by the strain rate effect has been studied, but only few experiments and analyses have been conducted. To investigate the behaviour of overlapping hoop-confined square reinforced normal-strength concrete columns, considering the strain rate effect at a strain rate of 10 -5 /sec to 10 -1 /sec induced by earthquake excitation, an explicit dynamic finite element analysis (FEA) model was developed in ABAQUS to predict the behaviour of confined RC columns subjected to the rapid concentric loading. A locally modified stress-strain relation of confined concrete with the strain rate sensitivity of the concrete material and the confining effect of overlapping hoops were proposed to complete the simulation of the dynamic behaviour of concrete with the concrete plastic-constitutive model in ABAQUS. The finite element predictions are consistent with the existing test results. Based on the FEA model, a parametric investigation was conducted to capture more information about the behaviour of confined RC columns under varying loading rates.

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Section: Fig 2 -Illustration Of the Finite Element Modelmentioning

confidence: 99%

“…This refers to the strain rate sensitivity of concrete and reinforcing steel, which has been documented in literature [1][2][3][4][5]. The strain rate sensitivity of the materials significantly affects the behaviour of reinforced concrete (RC) members under dynamic loading.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of the Behaviour of Reinforced Concrete Columns Confined by Overlapping Hoops Subjected to Rapid Concentric Loading

Zeng¹

2017

CEJ

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“…It is generally accepted that when the strain rate increases, the ultimate stress (strength), the elastic (secant) modulus and the peak strain increase [47]. For this purpose, based on CEB-FIP-2010 [48] For each plane, the equivalent strain is defined as the magnitude of strain vector: Figure 4 illustrates the effect of strain rate on the different aspects of the behavior of concrete.…”

Section: Constitutive Equations For the Rate Dependent Multi-laminatementioning

confidence: 99%

Multi-Laminate Rate-Dependent Modelling of Static and Dynamic Concrete Behavior through Damage Formulation

Sadrnejad

Hoseinzadeh

2017

Scientia Iranica

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Mathematical simulation of the nonlinear tri-dimensional mechanical behavior of quasi-brittle materials like concrete is one of the biggest challenges in the engineering science. It is vital to have the knowledge of the response of concrete specimens subjected to low and high strain rate deformation for the analysis of concrete structures under the static and dynamic loading cases. The behavior of this material is generally known to be strain rate sensitive. Among phenomena of different orientation, the multi plane models, like multi-laminate models using a constitutive equation in a vectorial form rather than tensorial form by means of capturing interactions, can meet this goal adequately. This paper suggests a robust rate dependent damage based model in the multi-planes framework accomplished with minimum parameters for calibration and appropriate for engineering purposes. This damage formulation has been built on the basis of two types of essential damage, axial damage and shear damage, that basically can happen on each sampling plane and based on this concept two new axial and shear damage functions are proposed. Model verification has been studied under different compressive and tensile loading rates, comparing the results of the proposed model with the experimental data and Mohr-Coulomb failure criterion envelope line.

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“…In the case of high-rate tensile loading, the ultimate uni-axial tensile strength may be as much as 5 to 7 times higher than the static tensile strength [21], and even though the effect on the ultimate compressive strength is less pronounced it may still be more than doubled [22]. It has recently also been indicated that the fracture energy is strain-rate-dependent [23][24][25].…”

Section: Concrete Behaviour Under Static and Dynamic Loadingmentioning

confidence: 99%

Numerical studies of the combined effects of blast and fragment loading

Nyström

Gylltoft

2009

International Journal of Impact Engineering

132

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The well-known synergetic effect of blast and fragment loading, observed in numerous experiments, is often pointed out in design manuals for protective structures. However, since this synergetic effect is not well understood it is often not taken into account, or is treated in a very simplified manner in the design process itself. A numerical-simulation tool has been used to further study the combined blast and fragment loading effects on a reinforced concrete wall. Simulations of the response of a wall strip subjected to blast loading, fragment loading, and combined blast and fragment loading were conducted and the results were compared. Most damage caused by the impact of fragments occurred within the first 0.2 ms after fragments' arrival, and in the case of fragment loading (both alone and combined with blast) the number of flexural cracks formed was larger than in the case of blast loading alone. The overall damage of the wall strip subjected to combined loading was more severe than if adding the damages caused by blast and fragment loading treated separately, which also indicates the synergetic effect of the combined loading.

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Compressive behaviour of concrete at high strain rates

Cited by 1,228 publications

References 34 publications

Finite Element Analysis of the Behaviour of Reinforced Concrete Columns Confined by Overlapping Hoops Subjected to Rapid Concentric Loading

Finite Element Analysis of the Behaviour of Reinforced Concrete Columns Confined by Overlapping Hoops Subjected to Rapid Concentric Loading

Multi-Laminate Rate-Dependent Modelling of Static and Dynamic Concrete Behavior through Damage Formulation

Numerical studies of the combined effects of blast and fragment loading

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