Mesoscopic investigation on the mechanism of concrete dynamic tensile strength enhancement based on the E(A, B) algorithm

Zhang, Penglin; Wu, Zhijun; Cui, Wenjun

doi:10.1016/j.conbuildmat.2022.127183

Cited by 6 publications

(4 citation statements)

References 47 publications

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“…A total of 13 cracks (C1–C13) were observed on the soil surface. It can be found that the distances between C1 and C2, C4 and C5, C6 and C7, C11 and C12 are relatively close, which will have a significant impact on the DFOS‐OFDR monitoring results (L. Zhang et al., 2023). Figure 7b shows the spatiotemporal evolution of the strain status of the FO cable with 0.01 m depth from 0 to 7,500 min.…”

Section: Resultsmentioning

confidence: 99%

“…In order to further explore how far in advance the DFOS‐OFDR framework can detect the propagation of soil cracking, this study defines a parameter called the early detection distance of soil cracking ( D ed ), which represents the distance between the FO cable and the soil crack tip when the DFOS‐OFDR framework first detects the presence of the crack. Considering the minimum sampling interval of the DFOS‐OFDR framework can be set to 1 mm, and the spatial resolution can reach 1

{\upmu }{\upvarepsilon }

, the micron‐scale soil deformation can be accurately determined (L. Zhang et al., 2023). Meanwhile, combined with our extensive experience in using DFOS‐OFDR framework for soil desiccation cracking monitoring (Xu, Tang, Cheng, Vahedifard, et al., 2022), we added an additional constraint of an increased tensile strain threshold of 50

{\upmu }{\upvarepsilon }

to identify the time when the DFOS‐OFDR framework first detects a crack.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, the tip of crack C8 is positioned at a considerable distance from the location of the FO cable, contributing to its absence in the strain distribution curve. Previous research has indicated that when the spacing distance between adjacent cracks is sufficiently close, the induced strains from multiple cracks tend to overlap (L. Zhang et al., 2023). This finding highlights the influence of soil crack spacing on the crack localization capability of the DFOS‐OFDR framework despite its high spatial resolution.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Breathing Phenomenon of Soil Desiccation Cracking: Insights From Novel Geophysical Observations

Xu,

Tang,

Yang

et al. 2024

JGR Earth Surface

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Drought‐induced soil desiccation cracking is a common natural phenomenon on the earth surface, which plays a significant role in influencing the hydro‐mechanical behavior of soils across various earthen engineering applications. However, there is still a scarcity of related studies investigating how field soil desiccation cracking responds to climate action. This study develops an innovative geophysical monitoring framework for investigating field desiccation cracking behaviors by utilizing the distributed fiber optical sensing (DFOS) technique based on optical frequency domain reflectometry (OFDR). The feasibility and significant potential of the DFOS‐OFDR framework in advancing soil desiccation cracking research is demonstrated through the implementation of field monitoring tests. The results not only indicate that the strain distribution curves of fiber optic cables at different depths provide insights into the soil shrinkage characteristics and the crack localization capability but also demonstrate the early detection capability of the DFOS‐OFDR framework for soil desiccation cracking from a visual perspective. Importantly, the field monitoring tests reveal that under the influence of climate change, desiccation cracking exhibits a distinctive pattern of periodic propagation and narrowing. This intriguing phenomenon is referred to as “soil crack breathing.” Additionally, the DFOS‐OFDR framework exhibits enhanced sensitivity in sensing the soil crack breathing phenomenon than visual observation methods. This innovative geophysical monitoring framework not only enables real‐time observation, continuous measurement, and high‐resolution characterization of soil desiccation cracking behavior but also serves as a valuable high‐precision observational method for investigating the complex soil‐atmosphere interactions under the influence of climate change.

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Section: Resultsmentioning

confidence: 99%

{\upmu }{\upvarepsilon }

{\upmu }{\upvarepsilon }

to identify the time when the DFOS‐OFDR framework first detects a crack.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Breathing Phenomenon of Soil Desiccation Cracking: Insights From Novel Geophysical Observations

Xu,

Tang,

Yang

et al. 2024

JGR Earth Surface

View full text Add to dashboard Cite

show abstract

“…However, Zhao et al (2014) found that the heterogeneity or microstructure of rock only contributes limited influence to the rate dependency. To reproduce the whole rate dependency, one possible solution is to implement a rate-dependent constitutive model that establishes the relationship between loading rates and the strength parameters, which has already been used in UDEC (Zhao et al 2015), DLSM (Kazerani et al 2010) and other methods (Zhang et al 2022). However, there is insufficient research to directly validate this method with SHPB experiments.…”

Section: Introductionmentioning

confidence: 99%

Quantitative investigation of rock dynamic failure using Voronoi-based discontinuous deformation analysis

Zhang,

Liu

et al. 2023

Preprint

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Dynamic failure widely exists in rock engineering, such as excavation, blasting, and rockburst. However, the quantitative measurement of the dynamic damage process using experimental methods remains a challenge. In this study, a SHPB modeling technique is established based on Voronoi-based DDA to study the damage evolution of Fangshan granite under dynamic loading. The assessment of cracking along the artificial joints among Voronoi sub-blocks is conducted by employing the modified contact constitutive law. A calibration procedure has been implemented to investigate the rock dynamic properties quantitatively. The dispersion and damping effect can be effectively eliminated by regular discretization in SHPB bars, based on which the dynamic stress equilibrium can be satisfied. To reproduce the loading rate effect of the dynamic compressive strength, which has been observed in the experiment, a modification strategy considering the influence of the rate effect on the strength meso-parameters is proposed. Using this strategy, the peak stresses of the transmitted waves predicted by DDA match well with those obtained from experiments conducted at different loading rates. The simulation results show that more microcracks are generated and the proportion of tensile cracks decreases as the loading rate increases. Furthermore, the dynamic mechanical behavior and fracturing process have also been discussed and compared with the experiments. The results show that the established SHPB system is a powerful tool for quantitative analysis of rock dynamics problems and is capable of handling more complex problems in the future.

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Quantitative investigation of rock dynamic failure using Voronoi-based discontinuous deformation analysis

Zhang,

Liu

et al. 2024

Geomech. Geophys. Geo-energ. Geo-resour.

View full text Add to dashboard Cite

Dynamic failure widely exists in rock engineering, such as excavation, blasting, and rockburst. However, the quantitative measurement of the dynamic damage process using experimental methods remains a challenge. In this study, a SHPB modeling technique is established based on Voronoi-based DDA to study the damage evolution of Fangshan granite under dynamic loading. The assessment of cracking along the artificial joints among Voronoi sub-blocks is conducted using the modified contact constitutive law. A calibration procedure has been implemented to investigate the rock dynamic properties quantitatively. The dispersion and damping effect can be effectively eliminated by regular discretization in SHPB bars, based on which the dynamic stress equilibrium can be satisfied. To reproduce the loading rate effect of the dynamic compressive strength, which has been observed in the experiment, a modification strategy considering the influence of the rate effect on the strength meso-parameters is proposed. Using this strategy, the peak stresses of the transmitted waves predicted by DDA match well with those obtained from experiments conducted at different loading rates. The simulation results show that more microcracks are generated and the proportion of tensile cracks decreases as the loading rate increases. Furthermore, the dynamic mechanical behavior and fracturing process have also been discussed and compared with the experiments. The results show that the established SHPB system is a powerful tool for quantitative analysis of rock dynamics problems and can handle more complex problems in the future.

show abstract

Mesoscopic investigation on the mechanism of concrete dynamic tensile strength enhancement based on the E(A, B) algorithm

Cited by 6 publications

References 47 publications

Breathing Phenomenon of Soil Desiccation Cracking: Insights From Novel Geophysical Observations

Breathing Phenomenon of Soil Desiccation Cracking: Insights From Novel Geophysical Observations

Quantitative investigation of rock dynamic failure using Voronoi-based discontinuous deformation analysis

Quantitative investigation of rock dynamic failure using Voronoi-based discontinuous deformation analysis

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