Dynamic Multiaxial Strength Criterion for Concrete Based on Strain Rate–Dependent Strength Parameters

Wang, Guosheng; Lu, Dechun; Du, Xiuli; Zhou, Xin

doi:10.1061/(asce)em.1943-7889.0001428

Cited by 12 publications

(5 citation statements)

References 30 publications

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“…It will be more difficult for the free water in the crack to reach the crack tip, so that the free water edge becomes a meniscus-shape. The surface tension of free water restrains the crack tip development of concrete, which can release more energy and enhance the failure strength of concrete (Wang et al., 2018a). The more the number of cracks and the longer the crack propagation path, the more obvious the above constraint effect.…”

Section: Resultsmentioning

confidence: 99%

Experiment and meso-scale modelling on combined effects of strain rate and specimen size on uniaxial-compressive failures of concrete

Jin

Miao

2023

International Journal of Damage Mechanics

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This paper presents experimental and meso-scale modelling studies on the combined effects of strain-rate and specimen size on uniaxial compressive failure behaviour of concrete. A series of uniaxial compressive tests and meso-scale simulations were conducted on concrete with various specimen sizes under different strain-rates covering the strain-rate range of seismic load, with special focus on the quantitative contribution of end-friction to compressive strength and its corresponding strain-rate effect as well as size effect. Results indicate that the uniaxial compressive failure with end-friction follows an hourglass failure pattern while that without end-friction exhibits a columnar failure pattern. The end-friction effect can form different confined zone distributions for various sized specimens, which can cause the contribution of end-friction to compressive strength is size dependent as well as enhance the influence of specimen size on static and dynamic strength. The contribution proportion of end-friction to compressive strength is around 20∼25%. Moreover, larger-sized specimen performs a stronger strain-rate effect and the increasing strain-rate can weaken the influence of specimen size on the real compressive strength. The proposed real DIF empirical formula considering the size-dependency (covering the low strain-rate range) can well estimate the strain-rate effect for concrete with different sizes, which can provide a valuable reference for the numerical calculation of dynamic mechanical response and the safety design of concrete structures.

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Section: Resultsmentioning

confidence: 99%

Experiment and meso-scale modelling on combined effects of strain rate and specimen size on uniaxial-compressive failures of concrete

Jin

Miao

2023

International Journal of Damage Mechanics

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“…The NUSC (Yao et al, 2004;Lu, 2006;Du et al, 2010;Wang et al, 2018) is applicable to various isotropic geomaterials, including soil, concrete, and rock. The failure surface of the NUSC in principal stress space is continuous, smooth and convex as shown in Fig.…”

Section: Transversely Isotropic Nonlinear Unified Strength Criterionmentioning

confidence: 99%

A novel transversely isotropic strength criterion for soils based on a mobilised plane approach

Liang

et al. 2019

Géotechnique

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The peak shear strength rules of transversely isotropic soils are stress state dependent and dependent on relative orientation between bedding plane and principal stress. Accordingly, the shear strength of transversely isotropic soils exhibits two primary characteristics: (i) the strength curve on the deviatoric plane is asymmetrical with respect to three principal stress axes; (ii) the shear strength changes with the direction angle of the bedding plane when the intermediate principal stress coefficient is a constant. In this paper, the mobilized plane is introduced and used to reveal the failure mechanism of soils. By projecting the microstructure tensor of transversely isotropic soils onto the normal of the mobilized plane, the directionality of the transversely isotropic soils is introduced into the friction rules on the mobilized plane, and a transversely isotropic strength parameter is proposed. The proposed strength parameter can extend isotropic strength criteria into transversely isotropic strength criteria. This mobilized plane approach is used to establish a novel transversely isotropic nonlinear unified strength criterion (TI-NUSC). The difficulty to establish a unified description of the asymmetrical strength curve and its evolution with direction angle is overcome by the established criterion. Comparisons between available test results and the TI-NUSC shows that the TI-NUSC can successfully describe these two primary peak strength characteristics.

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“…Meanwhile, the corresponding strength-energy criteria under different stress conditions were established. Additionally, numerous scholars obtained certain innovative conclusions according to the rock strength criteria established from multiple perspectives with the strain rate effect, the effect of intermediate principal stress (including the effect of Lord's angle), the thermal effect, the bedding effect and the effect of hydrostatic pressure [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Specifically, series of true triaxial mechanical tests of rocks were conducted [27].…”

Section: Introductionmentioning

confidence: 99%

Mohr–Coulomb and Modified Hoek–Brown Strength Criteria of Layered Sandstone Considering the Unloading Effect and Anisotropy

Song,

Zhang,

2023

Sustainability

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The Mohr–Coulomb (M-C) and Hoek–Brown (H-B) strength criteria are widely used in various engineering fields, such as mining engineering, tunnel engineering and so on. To investigate the M-C and H-B strength criteria considering the unloading effect and anisotropy, series of triaxial loading (unloading) tests on layered sandstone were conducted. The results revealed that the peak strength was significantly affected by the unloading effect. Moreover, the cohesion and internal friction angle had a significant nonlinear relationship with the bedding angle. Additionally, the M-C and modified H-B strength criteria were established considering the unloading effect and anisotropy. Then, according to the strength criteria established, the peak strength could be estimated theoretically. Furthermore, compared to the M-C strength criteria, the modified H-B strength criteria were more appropriate for accurately estimating the triaxial compressive strength of layered sandstones. The conclusions obtained could provide certain references for the stability control of deep excavation engineering.

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Dynamic Multiaxial Strength Criterion for Concrete Based on Strain Rate–Dependent Strength Parameters

Cited by 12 publications

References 30 publications

Experiment and meso-scale modelling on combined effects of strain rate and specimen size on uniaxial-compressive failures of concrete

Experiment and meso-scale modelling on combined effects of strain rate and specimen size on uniaxial-compressive failures of concrete

A novel transversely isotropic strength criterion for soils based on a mobilised plane approach

Mohr–Coulomb and Modified Hoek–Brown Strength Criteria of Layered Sandstone Considering the Unloading Effect and Anisotropy

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