Size effect of confined concrete subjected to axial compression

Li, Zhenbao; Jia, Songmin; Du, Xiuli; Xiu-guang, Yang

doi:10.1007/s11771-014-2056-7

Cited by 14 publications

(5 citation statements)

References 8 publications

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“…Other phenomena should also be considered for specific analyses, for instance, effects related to low cycle fatigue, 22 to size, 23 to temperature 9 and shape effects in compression.…”

Section: Structural Concrete Strength: Background and Implicationsmentioning

confidence: 99%

Concrete compressive strength: From material characterization to a structural value

Moccia

Ruiz

et al. 2020

Structural Concrete

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The compressive resistance of concrete in new structures is usually characterized on the basis of tests performed on concrete cylinders or cubes under relatively rapid loading conditions. Although efficient for material characterization, these tests do not acknowledge a number of phenomena potentially influencing the compressive resistance of concrete in actual structures. For this reason, when performing a structural analysis, strength reduction factors are usually considered in codes of practice modifying the uniaxial strength of material tests. In this paper, a detailed investigation of the influence of material brittleness and internal stress redistributions on the structural response of reinforced concrete members is presented. This work is based on a number of theoretical considerations and supported by the experimental results of more than 400 reinforced concrete columns tested with or without eccentricity and gathered from the literature. The results show the pertinence of considering a brittleness factor in the calculation of the structural resistance of reinforced concrete columns and compression zones of beams. The results of this work are eventually formulated in terms of code‐like proposals, currently considered in the draft of the new Eurocode 2 (prEN 1992‐1‐1:2018).

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“…Other phenomena should also be considered for specific analyses, for instance, effects related to low cycle fatigue, 22 to size, 23 to temperature 9 and shape effects in compression.…”

Section: Structural Concrete Strength: Background and Implicationsmentioning

confidence: 99%

Concrete compressive strength: From material characterization to a structural value

Moccia

Ruiz

et al. 2020

Structural Concrete

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“…The uniaxial compression strength of waste-soil is the most important factor in determining the dump stability, so an accurate measurement of uniaxial compressive strength of waste-soil sample is essential [6,7]. However, because of the friction between the bearing plate and waste-soil sample in the uniaxial compression experiment, the uneven stress distribution, triaxial compression region, and tensile region will arise locally [8,9]. The above phenomena will have a bad effect on the accurate measurement of waste-soil sample parameters and the study of the failure mechanism [10].…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on End Effect of Waste-Soil Samples under Uniaxial Compression

Wang

Liu

Pang³

2022

Geofluids

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In order to investigate the influence of end effect on the waste-soil sample strength under uniaxial compression, the influence law of end effect on the uniaxial compression strength is numerically simulated by the FLAC3D software, and the reliability of the numerical model is verified by comparing it with the test results. Based on the above model, the influence of end effect on the lateral displacement and stress state of waste-soil samples is simulated, and the formation mechanism of end effect under uniaxial compression is revealed. The results show that, when the friction coefficient increases from 0 to 0.4, the uniaxial compression strength and percentage of triaxial compression units first increase rapidly and then slowly and then finally remain invariant. With the increase of the friction coefficient, the lateral displacement of the sample is significantly reduced. On the end surface, the nearer to the edge one is, the greater the decrease is. The triaxial compression region on the axis section is triangular in distribution; with the increase of the friction coefficient, this region increases first rapidly and then slowly and then finally remains invariant. The end effect produces lateral compression stress by reducing the lateral displacement of the end surface of samples, and lateral compression stress causes the sample to enter the triaxial compression state. With the increase of the friction coefficient, the triaxial compression region increases gradually, and thus, the uniaxial compression strength of the entire sample increases.

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“…Numerous test efforts have been carried out to explore the size effect in RC columns. Many studies have concentrated on the influencing factors on the size effect of RC columns, involving the slenderness ratio (Bažant and Kwon, 1994; Şener et al., 1999, 2004), the strength grade of concrete (Koç and Şener, 2009; Li et al., 2016), the transversal confinement (e.g., the stirrup-confined (Němeček et al., 2005; Li et al., 2014; Li et al., 2016), fiber-confined (Elsanadedy et al., 2012; Liang et al., 2012; Masia et al., 2004; Wang et al., 2016), steel-tube confined (Sakino et al., 2004; Yamamoto et al., 2002)), as well as the loading pattern (Bažant and Kwon, 1994; Guo and Bažant, 2007). Moreover, finite element analyses were also performed, e.g., in the publications (Bažant and Jirasek, 2002; Majewski et al., 2008; Pijaudier-Cabot et al., 2004; van Mier and van Vliet, 2003).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations on the size effect of moderate high-strength reinforced concrete columns under small-eccentric compression

Jin

Ding

et al. 2017

International Journal of Damage Mechanics

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The paper deals with an experimental investigation and numerical simulation of moderate high-strength reinforced concrete (RC) columns subjected to a small-eccentric compressive loading ( e0 = 0.25 h0). A series of tests on the behavior of 12 geometrically similar moderate high-strength reinforced concrete columns with two different stirrups ratios (i.e., 0% and 0.66%) were conducted. The maximum structural size of the square reinforced concrete columns was 800 mm. A 2D mesoscale method for the simulation of the behavior of reinforced concrete columns was established. The numerical tests on the reinforced concrete columns with larger stirrup ratios (1.2% and 2.4%) were carried out complementarily, based on the fact that the simulation results were consistent with the available test observations. The failure patterns, the nominal compressive stress–strain relationships, the nominal compressive strength, and the post-peak softening behavior of the reinforced concrete columns were studied. Furthermore, the influence of stirrups on failure behavior and size effect of the reinforced concrete columns was revealed. One can conclude that (1) the size effect exists in the nominal compressive strength of the eccentrically loaded high-strength reinforced concrete columns with the four different stirrup ratios; (2) comparison of the present test results and the “size effect law” proposed by Bažant shows good agreement; (3) the presence of stirrups improves the nominal strengths, makes the failure of columns less brittle, and weakens the size effect; and (4) the proposed mesoscale numerical method is capable of describing the mechanical behavior of eccentrically loaded reinforced concrete columns.

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Size effect of confined concrete subjected to axial compression

Cited by 14 publications

References 8 publications

Concrete compressive strength: From material characterization to a structural value

Concrete compressive strength: From material characterization to a structural value

Numerical and Experimental Study on End Effect of Waste-Soil Samples under Uniaxial Compression

Experimental and numerical investigations on the size effect of moderate high-strength reinforced concrete columns under small-eccentric compression

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