Experimental Study of the Dynamic Flexural Strength of Concrete

Régal, Xavier; Hanus, Jean‐Luc

doi:10.1007/s11340-016-0243-1

Cited by 17 publications

(4 citation statements)

References 29 publications

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“…The properties of R30A7 concrete are given in Table 2. In recent years, the behaviour of this concrete has been characterised by numerous tests such as quasi‐static triaxial compression tests under pressures as high as 800 MPa, [ 24–26 ] dynamic tensile loading test [ 27–29 ] and shear loading test. [ 20 ]…”

Section: The R30a7 Concretementioning

confidence: 99%

A novel experimental method to characterise the shear strength of concrete based on pre‐stressed samples

Forquin

Abdul‐Rahman

Saletti

2022

Strain

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The present paper describes a novel experimental method for characterising the confined shear strength of concrete or rock‐like materials based on the use of pre‐stressed sample. This method, called PS‐PTS (Pre‐Stressed Punch‐Through‐Shear), employs a metallic confinement cell that is first quasi‐statically deformed so the concrete sample can be introduced in between the cell jaws. The confinement force is transmitted to the sample in the unloading stage. It is shown that this initial pre‐load level can be predicted by an elastic closed‐form solution. Strain‐gauges glued on the cell allow the confinement level applied to the sample to be experimentally measured during the pre‐stressing stage and the shear stage. In the next stage, the central part of the sample is subjected to a differential displacement towards the lateral parts by means of a hydraulic press so the confined shear strength of the tested material can be deduced. The results are compared to the data previously obtained with an “oedometric” confinement cell in terms of confinement stresses and shear strength. Highlights A Pre‐Stressed Punch‐Through‐Shear technique is proposed based on pre‐loaded cell. A close‐form solution predicts the level of pre‐load applied to the sample. The cell is instrumented with strain gauges, so the applied forces are measured. The technique is applied to characterise the confined shear strength of concrete. Results are compared to those obtained with the ‘Oedo‐PTS’ testing method.

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Section: The R30a7 Concretementioning

confidence: 99%

A novel experimental method to characterise the shear strength of concrete based on pre‐stressed samples

Forquin

Abdul‐Rahman

Saletti

2022

Strain

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“… Model calibration and evaluation of DIF with experimental results: ( a ) stress–strain curves of simulations and experiments [ 2 ]; ( b ) DIF of tension strength for simulations and experiments [ 42 ]. …”

Section: Figurementioning

confidence: 99%

Numerical Study on the Dynamic Fracture Energy of Concrete Based on a Rate-Dependent Cohesive Model

Zhang

Liu

et al. 2021

Materials

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As an important parameter for concrete, fracture energy is difficult to accurately measure in high loading rate tests due to the limitations of experimental devices and methods. Therefore, the utilization of numerical methods to study the dynamic fracture energy of concrete is a simple and promising choice. This paper presents a numerical investigation on the influence of loading rate on concrete fracture energy and cracking behaviors. A novel rate-dependent cohesive model, which was programmed as a user subroutine in the commercial explicit finite element solver LS-DYNA, is first proposed. After conducting mesh sensitivity analysis, the proposed model is calibrated against representative experimental data. Then, the underlying mechanisms of the increase in fracture energy due to a high strain rate are determined. The results illustrate that the higher fracture energy during dynamic tension loading is caused by the wider region of the damage zone and the increase in real fracture energy. As the loading rate increases, the wider region of the damage zone plays a leading role in increasing fracture energy. In addition, as the strain rate increases, the number of microcracks whose fracture mode is mixed mode increases, which has an obvious effect on the change in real fracture energy.

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“…This concrete contains hard siliceous aggregates with a maximum aggregates size of 8mm. It was already used in quasistatic triaxial tests [19][20][21], in quasi-oedometric tests [22] and in bending tests [23]. Its composition and mechanical properties are listed in Table 1.…”

Section: Tested Materialsmentioning

confidence: 99%

Experimental study of the static and dynamic behavior of pre-stressed concrete subjected to shear loading

Abdul‐Rahman

Saletti

Forquin

2021

Engineering Structures

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Experimental Study of the Dynamic Flexural Strength of Concrete

Cited by 17 publications

References 29 publications

A novel experimental method to characterise the shear strength of concrete based on pre‐stressed samples

A novel experimental method to characterise the shear strength of concrete based on pre‐stressed samples

Numerical Study on the Dynamic Fracture Energy of Concrete Based on a Rate-Dependent Cohesive Model

Experimental study of the static and dynamic behavior of pre-stressed concrete subjected to shear loading

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