Laboratory investigation on the influence of high compressive strain rates on the hybrid fibre reinforced self-compacting concrete

Pająk, Małgorzata; Janiszewski, Jacek; Kruszka, Leopold

doi:10.1016/j.conbuildmat.2019.116687

Cited by 52 publications

(25 citation statements)

References 36 publications

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“…The results from broad research, covering the behaviour of hybrid fibre reinforced self-compacting concrete under quasi-static compression and high compression strain rates, were presented in [9,10]. Values of the quasi-static compressive strengths and accompanying strains of each mix, which were extensively discussed in previous papers, were presented in this article for the comparison (Table 3).…”

Section: Resultsmentioning

confidence: 99%

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Research on the recycled and hybrid fibre reinforced self-compacting concrete under flexure

Pająk

2020

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In the present study the steel fibres coming from the end-of-life tires were applied as a reinforcement of self-compacting concrete. The influence of the recycled fibres and their mixture with glass or polypropylene fibres (hybrid mixes) on the flexural behaviour of SCC was tested. The research revealed that the dosage of 1.5% of recycled fibres is highly effective in the SCC matrix. The values of the residual flexural tensile strengths obtained in the tests classified the R-SCC to be used as a partial replacement of the conventional reinforcement. The addition of other types of fibres to R-SCC caused the further enhancement of flexural parameters with no negative effect on the distribution of the fibres in the mix.

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Section: Resultsmentioning

confidence: 99%

“…The results presented in the paper cover the flexural response of HFR-SCC. The behaviour of the mix under high strain rates was discussed in sections 9 and 10 [9], [10]. The designation for all the mixtures were the same in all the papers to facilitate the possible linking of data and to draw further conclusions.…”

Section: Introductionmentioning

confidence: 99%

Research on the recycled and hybrid fibre reinforced self-compacting concrete under flexure

Pająk

2020

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“…The pulse shaping method is not used in order to avoid smoothing the elastic wave signal and obtain a representative measurement related to the split Hopkinson pressure bars (SHPBs) [18][19][20][21]. It should be noted that a pulse shaper is frequently used to test brittle materials [20,21], as it increases the rising time and causes the strain rate to be both more constant and lower (see Figure 2). A comparison of waves for two examples (with and without a copper shaper) is presented in Figure 2.…”

Section: Experimental Techniquementioning

confidence: 99%

“…This is particularly important when using the presented analysis to study the dynamic strength of modern high-strength concrete or other brittle-like materials. The effect of strain rate sensitivity on the dynamic strength of concrete is quite high during compression when compared with its effect in other materials [6,11,21,22]. As a result, it is important to consider it to properly estimate the dynamic behavior of structures subjected to extreme impulsive loading [23].…”

Section: ⁄ ⁄mentioning

confidence: 99%

Modeling and Design of SHPB to Characterize Brittle Materials under Compression for High Strain Rates

2020

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This paper presents an analytical prediction coupled with numerical simulations of a split Hopkinson pressure bar (SHPB) that could be used during further experiments to measure the dynamic compression strength of concrete. The current study combines experimental, modeling and numerical results, permitting an inverse method by which to validate measurements. An analytical prediction is conducted to determine the waves propagation present in SHPB using a one-dimensional theory and assuming a strain rate dependence of the material strength. This method can be used by designers of new SPHB experimental setups to predict compressive strength or strain rates reached during tests, or to check the consistencies of predicted results. Numerical simulation results obtained using LS-DYNA finite element software are also presented in this paper, and are used to compare the predictions with the analytical results. This work focuses on an SPHB setup that can accurately identify the strain rate sensitivities of concrete or brittle materials.

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“…For the same strength grade, the elastic modulus of SCC is basically similar to that of ordinary concrete, while the strength of SCC shows better homogeneity and less dispersion [ 26 ]. In practice, SCC not only bears the static load, but also bears dynamic loads, such as earthquake, wind, impact and explosion, etc, under which circumstances the SCC exhibits obvious strain rate effect [ 27 , 28 ], i.e., the mechanical properties of SCC are influcenced by the strain rate. Therefore, the research of concrete dynamic performance has extremely value of civil engineering [ 4 , 5 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of Dynamic Compression Performance of Self-Compacting Concrete

et al. 2020

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To investigate the dynamic performance of self-compacting concrete (SCC), the dynamic uniaxial compression tests at eight different loading strain rates were performed on the ordinary concrete and SCC cubic specimens. Based on the tests, the compression failure patterns and stress–strain curves of both kinds of concrete were obtained. The results show that SCC performs more brittle than ordinary concrete by showing the diagonal crack failure pattern of SCC at a high strain rate. Besides, with the increase of loading strain rate, the peak compressive stress of SCC is slightly lower than that of ordinary concrete, but the increase of elastic modulus is slightly higher than that of ordinary concrete. The peak compressive strains of the two kinds of concrete are discrete under the influence of loading strain rate, thus putting forward the relation equation for the loading strain rate and peak compressive stress increase coefficient of the two kinds of concrete. Besides, based on the theory of elastic–plastic damage and considering the dynamic extension of damage, the dynamic constitutive relation with good applicability between ordinary concrete and SCC was established.

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Laboratory investigation on the influence of high compressive strain rates on the hybrid fibre reinforced self-compacting concrete

Cited by 52 publications

References 36 publications

Research on the recycled and hybrid fibre reinforced self-compacting concrete under flexure

Research on the recycled and hybrid fibre reinforced self-compacting concrete under flexure

Modeling and Design of SHPB to Characterize Brittle Materials under Compression for High Strain Rates

An Experimental Study of Dynamic Compression Performance of Self-Compacting Concrete

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