Fragmentation-based dynamic size effect of layered roller compacted concrete (RCC) under impact loadings

Wang, Xiaohua; Zhang, Sherong; Wang, Chao; Song, Ran; Shang, Chao; Cao, Kelei

doi:10.1016/j.conbuildmat.2018.10.161

Cited by 15 publications

(8 citation statements)

References 38 publications

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“…Therefore, the original mass of each RCC specimen was weighed before SHPB tests, which was used to calibrate the mass loss for the collected concrete fragments after experiments. The mass loss rate in this study could be less than 2% (Wang et al 2018a). Although 10 specimens were prepared for each group, only 101 specimens successfully satisfied the assumptions of the SHPB test and the allowable mass loss rate.…”

Section: Experimental Designmentioning

confidence: 75%

“…The practical construction technique of RCC was simulated in the laboratory experiments, which has been described detailly in our previous studies (Wang et al 2018a(Wang et al , 2018b. Table 1 shows the mixture proportion of RCC.…”

Section: Specimen Preparationmentioning

confidence: 99%

“…In our previous studies, it has been proved that the fractal characteristics of impact-induced fragments could be used to explain the size-dependence and strain rate effect of RCC (Wang et al 2018a). Thus, the objective of this section is to investigate the feasibility of deriving the true strain-rate effect via the fractal dimension from concrete fragmentation.…”

Section: Quantification Of Concrete Fragmentationmentioning

confidence: 99%

“…However, the true strain-rate effect of RCC still remains not clear. Moreover, the fractal mechanism of concrete fragmentation in SHPB tests could explain the size dependence of dynamic compressive strength induced by the structural effect (Wang et al 2018a).…”

Section: Introductionmentioning

confidence: 99%

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Derivation of the True Strain Rate Effect of Roller Compacted Concrete (RCC) from Impact-Induced Fragmentation

Wei

Zhang

Wang

et al. 2021

ACT

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The true strain-rate effect for roller compacted concrete (RCC) removing the structural effect is a primary concern to achieve a reliable response prediction of RCC structures. In this study, a series of laboratory tests were carried out to study the dynamic compressive strength of RCC specimens with three different sizes subjected to various high-rate loadings. Based on the traditional decoupling method, the strength enhancements due to the inertial and end friction confinements were numerically evaluated and removed from the experimental DIF data. However, the mean values of material properties are generally employed in numerical simulation, which cannot reflect the high variability due to fast-successive constriction and mix proportion. This brings subjectivity and may result in incorrect evaluation of the structural effect and high variability in corrected DIF data. To solve this problem, the fractal dimension was introduced to quantify the fracture degree of impact-induced concrete fragments and describe the strain rate effect without significant variability. At last, a fragmentation-based approach was proposed to derive the true strain-rate effect of RCC and verified by comparison with the numerical and semi-theoretical methods.

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Section: Experimental Designmentioning

confidence: 75%

Section: Specimen Preparationmentioning

confidence: 99%

Section: Quantification Of Concrete Fragmentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Derivation of the True Strain Rate Effect of Roller Compacted Concrete (RCC) from Impact-Induced Fragmentation

Wei

Zhang

Wang

et al. 2021

ACT

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“…The fly ash content and the sand ratio are 60% and 31% by weight, respectively. The details of the RCC mixture and the preparation process of the specimens are given in our previous studies [17][18][19][20], and details of the RCC mixture are given in Table 1. Uniaxial and triaxial compression tests were performed at the State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University.…”

Section: Uniaxial and Triaxial Compressive Resultsmentioning

confidence: 99%

Modifications of the HJC (Holmquist–Johnson–Cook) Model for an Improved Numerical Simulation of Roller Compacted Concrete (RCC) Structures Subjected to Impact Loadings

et al. 2020

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Structures made of Roller Compacted Concrete (RCC) may be subjected to dynamic loads during their service life. Understanding the dynamic material properties of RCC and the performance of RCC structures is essential for better analysis and design of RCC structures. As full-scale tests are often unaffordable, numerical simulation methods are continuously employed. However, in numerical simulations, determining a reasonable constitutive relationship for RCC materials is still limited due to the complexity of the composite and the special rolling and compacting construction technology. In this paper, the triaxial compressive test and split Hopkinson pressure bar (SHPB) experimental results for RCC are introduced as an experimental foundation. Parameter calibrations and modifications in terms of the strength yield surface, the strain rate effect and the failure criterion for the RCC materials are presented. Numerical verification is illustrated for simulating the SHPB experiment and predicting the dynamic compressive characteristics of RCC specimens with a modified HJC model. The results reveal that the simulation results for the modified model have better agreement with the test data than those with the model before modification and have better simulation results. Sensitivity studies of the key parameters on the yield surface of the modified HJC model are conducted to improve the simulation effect for numerically predicting the performance of RCC structures exposed to explosive and impact loads.

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Dynamic Constitutive Model of RCC for Fully-Graded Dam

Zhang

Wang

2023

Hydroscience and Engineering

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Fragmentation-based dynamic size effect of layered roller compacted concrete (RCC) under impact loadings

Cited by 15 publications

References 38 publications

Derivation of the True Strain Rate Effect of Roller Compacted Concrete (RCC) from Impact-Induced Fragmentation

Derivation of the True Strain Rate Effect of Roller Compacted Concrete (RCC) from Impact-Induced Fragmentation

Modifications of the HJC (Holmquist–Johnson–Cook) Model for an Improved Numerical Simulation of Roller Compacted Concrete (RCC) Structures Subjected to Impact Loadings

Dynamic Constitutive Model of RCC for Fully-Graded Dam

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