Impact behaviour of concrete: a computational approach

Barpi, Fabrizio

doi:10.1016/j.engfracmech.2003.11.007

Cited by 40 publications

(22 citation statements)

References 13 publications

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“…Barpi(2004), Tham(2006), Katayama et al(2007) In the present paper, experimental evidences based on SHPB tests on solid and tubular mortar specimens are given to demonstrate the correlations between the representative axial strain-rate and the axial strain acceleration in a SHPB test on concrete-like material. A tubular specimen is introduced in order to reduce the inertia-induced radial confinement, and thus, demonstrate the influence of the inertial-induced radial confinement on DIF in SHPB tests, which further confirms the findings in Li and Meng(2003).…”

Section: Introductionmentioning

confidence: 98%

Further investigation on the dynamic compressive strength enhancement of concrete-like materials based on split Hopkinson pressure bar tests. Part I: Experiments

Zhang¹,

Wu²,

Li³

et al. 2009

International Journal of Impact Engineering

242

126

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Effects of the inertia-induced radial confinement on the dynamic increase factor (DIF) of a mortar specimen are investigated in split Hopkinson pressure bar (SHPB) tests. It is shown that axial strain acceleration is unavoidable in SHPB tests on brittle samples at high strain-rates although it can be reduced by the application of a wave shaper. By introducing proper measures of the strain-rate and axial strain acceleration, their correlations are established. In order to demonstrate the influence of inertia-induced confinement on the dynamic compressive strength of concrete-like materials, tubular mortar specimens are used to reduce the inertia-induced radial confinement in SHPB tests. It is shown that the DIF measured by SHPB tests on tubular specimens is lower than the DIF measured by SHPB tests on solid specimens. This paper offers experimental support for a previous publication , Int. J. of Solids and Struct., 40,[343][344][345][346][347][348][349][350][351][352][353][354][355][356][357][358][359][360], which claimed that inertia-induced radial confinement makes a large contribution to the dynamic compressive strength enhancement of concrete-like materials when the strain-rate is greater than a critical transition strain-rate between 10 1 and 10 2 s -1 . It is concluded that DIF formulae for concrete-like materials measured by split Hopkinson pressure bar tests need to be corrected if they are going to be used as the unconfined uniaxial compressive strength in the design and numerical modelling of structures made from concrete-like materials to resist impact and blast loads.

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Section: Introductionmentioning

confidence: 98%

Further investigation on the dynamic compressive strength enhancement of concrete-like materials based on split Hopkinson pressure bar tests. Part I: Experiments

Zhang¹,

Wu²,

Li³

et al. 2009

International Journal of Impact Engineering

242

126

View full text Add to dashboard Cite

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“…Stefan effect라 불리는 현상으로 설명될 수 있으며, 이 현상을 간략히 기술하면 다음과 같다 (Rossi, 1991 (Barpi, 2004;Gatuing and Pijaudier-Cabot, 2002;Kim et al, 2013;Kim, 2011; Fig. 3(a)).…”

Section: 콘크리트의 강도는 다른 물성에 비하여 더 큰 속도 의존성을unclassified

Rheological Models for Simulations of Concrete Under High-Speed Load

Hwang¹,

Lim²

2015

Journal of The Korean Society of Civil Engineers

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In this study, the rheological models were introduced and developed to reflect rate dependent tensile behaviour of concrete. In general, mechanical properties(e.g. strength, elasticity, and fracture energy) of concrete are increased under high loading rates. The strength of concrete shows high rate dependency among its mechanical properties, and the tensile strength has higher rate dependency than the compressional strength. To simulate the rate dependency of concrete, original spring set of RBSN(Rigid-Body-Spring-Network) model was adjusted with viscous and friction units(e.g. dashpot and Coulomb friction component). Three types of models( 1) visco-elastic, 2) visco-plastic, and 3) visco-elasto-plastic damage models) are considered, and the constitutive relationships for the models are derived. For validation purpose, direct tensile test were simulated, and characteristics of the three different rheological models were compared with experimental stress-strain responses. Simulation result of the developed visco-elasto-plastic damage(VEPD) model demonstrated well describing and fitting with experimental results.

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“…With time, however, the use of these theories was extended for describing the phenomenological behavior of essentially heterogeneous materials such as concrete and masonry, which also includes discontinuities. Over the years, a large number of constitutive models describing the behavior of structural concrete have been proposed, the analytical formulation of which has been based on: plasticity [41,91,83,180], viscoplasticity [36,81,25], continuum damage mechanics [38,88], or a combination of these theories [73,40,187,65,72]. The resulting formulations usually incorporate a number of parameters, the evaluation of which is essential for achieving a close correlation between the model-predicted behavior and its experimentally-established counterpart.…”

Section: Modeling Structural Reinforced Concrete Behaviormentioning

confidence: 99%