Mesoscale modelling of fibre reinforced concrete material under compressive impact loading

Xu, Zhuo; Hao, Hong; Li, H.N

doi:10.1016/j.conbuildmat.2011.06.022

Cited by 91 publications

(35 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In 2012, Xu et al [9] used a two-dimensional axisymmetric mesoscopic model of SFRC specimen in order to simulate an SHPB setup similar to the test performed by Lok an Zhao [6]. Although axisymmetric modeling may exaggerate the con nement e ect imposed by steel bers, obtained results could predict the DIF of SFRC specimen at di erent strain rates very well.…”

Section: Introductionmentioning

confidence: 88%

“…Erosion algorithm will remove elements that pass speci c de ned criteria. In order to visualize the fracture and spallation process of concrete de ned by K&C material model, researchers have commonly implemented this method [9,27]. Obtaining a more stable model is also a side bene t of de ning erosion criterion.…”

Section: Erosion Criterionmentioning

confidence: 99%

“…Some of the previous researchers have employed two-dimensional mesoscopic models to investigate steel ber reinforced concrete in high strain rates (e.g., [9,12]). This research tries to present a more realistic three-dimensional mesoscopic nite element model of high-strength steel ber-reinforced concrete, and investigate how well this model can simulate the behavior of a similar SHPB test specimen in di erent compressive strain rates, and how the steel bers and aggregates can a ect the stress distribution, strength enhancement, and the behavior of the model.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Strain Rate Effect in the Mesoscopic Modeling of High-Strength Steel Fiber-Reinforced Concrete

Mehrpay

Jalali

2017

Scientia Iranica

View full text Add to dashboard Cite

Abstract. The research, presented in this paper, aims to investigate the behavior of a High-Strength Steel Fiber-Reinforced Concrete (HSSFRC) mesoscopic nite element model at compressive high strain rates. In order to produce a three-dimensional meso-scale nite element model, a computer code is developed to randomly produce mesoscopic models of SFRC specimen. The specimen is assumed to be reinforced by 0.6 percent volume fraction of hooked steel bers (Dramix RC-65/35-BN) with random positions and orientations. Aggregates of the compound are assumed to have spherical shape and are produced according to Fuller grading curve. Based on the initial mesoscopic model, a nite element model is produced and used in an explicit dynamic simulation. The contribution of inertial con nement to the dynamic strength enhancement of concrete at high strain rates was investigated, and its e ective role was observed. Accordingly, de ning a Dynamic Increase Factor (DIF) for mortar matrix led to overestimation; nevertheless, the inertial con nement by itself could not justify the increment of specimen strength under the dynamic loading. Obtained results also show that steel bers have a negligible in uence on the strength, strength enhancement ratio (DIF), and post-peak behavior of the model at high strain rates.

show abstract

Section: Introductionmentioning

confidence: 88%

Section: Erosion Criterionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Strain Rate Effect in the Mesoscopic Modeling of High-Strength Steel Fiber-Reinforced Concrete

Mehrpay

Jalali

2017

Scientia Iranica

View full text Add to dashboard Cite

show abstract

“…The SFRC with spiral-shaped fibres has demonstrated to outperform SFRC with other types of steel fibres [4][5][6][7][8][9][10], due to its better bonds to concrete than other fibre types. Despite observations of good performance of concrete materials reinforced with spiral-shaped steel fibres, like concrete reinforced with other fibre types, fluctuations of mechanical properties of the SFRC materials have been observed in all the previous studies.…”

Section: Introductionmentioning

confidence: 99%

“…To account for the randomly distributed coarse aggregates and steel fibres, modelling the SFRC specimens in mesoscale is needed. A number of researchers have performed mesoscale modelling of SFRC materials under static loading [13,14], impact loading [7,14,15] and blast loading [16]. With distinctive consideration of steel fibres, coarse aggregates and mortar matrix, detailed observations such as stress and strain distributions, crack initiation and propagation, fibre-matrix interaction, can be made through these studies.…”

Section: Introductionmentioning

confidence: 99%

An efficient method to derive statistical mechanical properties of concrete reinforced with spiral-shaped steel fibres in dynamic tension

Wang

Hao

et al. 2016

Construction and Building Materials

View full text Add to dashboard Cite

Steel-fibre-reinforced concrete (SFRC) has been recognised as an effective solution to resist impact loading on structures. The reliable application and efficient design of SFRC structures depends on the knowledge of its mechanical properties. Since many important factors, including the locations and orientations of fibres and aggregates in concrete and the material properties of concrete matrix, are intrinsically random, the mechanical properties of SFRC present a high level of randomness. To accurately quantify them, effective statistical techniques are indispensable. Using traditional statistical techniques, a large quantity of data, from either experiments or numerical simulations, are needed to derive the correlation between the mechanical properties and the random factors. However, both ways are time-consuming and costly. Therefore, very little information regarding the statistical mechanical properties of SFRC can be found in the current literature. In this study, a kernel-based nonparametric statistical method is proposed to derive the statistical mechanical properties of SFRC with limited number of data. The behaviours of SFRC with randomly distributed spiral-shaped fibres and aggregates under impact loading are simulated using commercial software LS-DYNA. The simulation accuracy is validated by the experimental results. The influences of various volume fractions of fibres on dynamic increase factor (DIF) of the tensile strength of SFRC specimens under dynamic loadings at different strain rates are quantified through a prediction model obtained from kernel regression. The results demonstrate that the proposed method is able to estimate the DIF value of SFRC based on the tensile strength and strain rate, and to derive the statistical mechanical properties of SFRC.

show abstract

Dynamic failure behaviors of reinforced‐concrete based on the split‐Hopkinson pressure bar tests

Deng

Chen

2022

Structural Concrete

View full text Add to dashboard Cite

In the present study, using the pulse-shaping technique and high-speed photography, large-dimension (Ф120 mm Â 100 mm) Split-Hopkinson Pressure Bar (SHPB) tests of reinforced-concrete specimens with two types of rebar configurations (Ø and #) were conducted. Three typical failure patterns, denoted as "exterior failure," "interior failure," and "complete failure," were observed. The reflection waves of "exterior failure" all exhibited a "single-peak" followed by a period of approximately constant-strain rate loading. For "interior failure" and "complete failure," the "double-peaks" phenomenon appeared in the reflection waves of reinforced-concrete, but the "compression wave" of the transmission wave was weakened and gradually disappeared. Meanwhile, for plain-concrete and reinforced-concrete, the postpeak behavior of the stress-strain curves included three stages, that is, stress-drop, stress-buffer, and stress-softening. The main role of the rebars in the reinforced-concrete was reflected in the postpeak behavior of the stress-strain curve, which exhibited plastic flow behavior as the metal materials. The stability of the rebar frame directly affected the efficiency of the rebars. Additionally, the weak interfacial effect of the smooth rebar between the concrete yielded a counterintuitive test result, that is, at the same strain rate, the dynamic compressive strength of the reinforced-concrete was lower than that of the plain-concrete. However, owing to its toughness and deformation ability, the rebar frame provided good protection of the internal concrete.dynamic strength, failure mode, reinforced-concrete, SHPB, waveform feature | INTRODUCTIONRecent studies on the dynamic impact loading behavior of reinforced-concrete have focused on the anti-impact, explosion, and penetration performance of the corresponding structures, such as reinforced-concrete beams, slabs, and targets. For example, Kojima and Hanchak et al., 1,2 Remennikov et al., 3 Silva, 4 Thiagarajan, 5 and Wang et al. 6 conducted experimental researches on the dynamic response behavior of reinforced-concrete under armor penetration/perforation, drop weight impact and explosion, respectively, and obtained relatively rich research results.Owing to the large difference in mechanical properties between rebar and concrete, few studies have been Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.Yongjun Deng and Taihong Lv contributed equally to this study.

show abstract

Mesoscale modelling of fibre reinforced concrete material under compressive impact loading

Cited by 91 publications

References 27 publications

Strain Rate Effect in the Mesoscopic Modeling of High-Strength Steel Fiber-Reinforced Concrete

Strain Rate Effect in the Mesoscopic Modeling of High-Strength Steel Fiber-Reinforced Concrete

An efficient method to derive statistical mechanical properties of concrete reinforced with spiral-shaped steel fibres in dynamic tension

Dynamic failure behaviors of reinforced‐concrete based on the split‐Hopkinson pressure bar tests

Contact Info

Product

Resources

About