Experimental investigation of the size effect of layered roller compacted concrete (RCC) under high-strain-rate loading

Wang, Xiaohua; Zhang, Sherong; Wang, Chao; Song, Ran; Shang, Chao; Fang, Xin

doi:10.1016/j.conbuildmat.2018.01.033

Cited by 71 publications

(20 citation statements)

References 39 publications

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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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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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“…Some scholars [17,18] took into account the total strain rate to calculate the strength of a single size of rock specimen under static and dynamic conditions, but they did not consider the change in rock strength with the specimens' size. Based on the Weibull distribution function, Wang et al [19] introduced volume parameters and strain rate related parameters and considered the influence of the material size and strain rate effect to better elaborate the dynamic compressive strength rule of roller compacted concrete (RCC). e relative parameters in the formula are not suitable for rock materials.…”

Section: Introductionmentioning

confidence: 99%

“…For many rock materials, many scholars have proposed many formulas for the size effect of strength based on experiments or theories, but there is no universal formula for size effect which can meet the conditions of quasistatic and dynamic loading. An improved formula based on the Weibull distribution function [16,19] was applied to rock material under quasistatic and dynamic conditions. e relevant rock parameters were determined through tests and related studies, and the application effect was verified, to link the size effect of rock under quasistatic and dynamic conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al [16] applied the Weibull distribution to various quasibrittle materials, all of which could reflect the size effect rule of material strength, indicating that the size effect formula using the Weibull distribution under quasistatic conditions is universal. Wang et al [19] applied the Weibull distribution to the dynamic loading of concrete and added relevant volume and strain rate parameters to obtain a formula of the size effect law for roller compacted concrete (RCC), which proved the reliability of the Weibull distribution in the study of the size effect law in dynamic loading. As a heterogeneous material, the failure process of granite includes compaction, elastic deformation, stable failure, and unsteady failure.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Rock Size Effect of Quasistatic and Dynamic Compression Characteristics

Jun

Meng

Liu

et al. 2021

Advances in Materials Science and Engineering

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To study the size effect of rock under quasistatic and dynamic conditions, the changes in compressive strength with the change in specimen size are measured. Cylindrical granite specimens with length-diameter ratios in the range of 0.5∼1 are used for uniaxial compression tests using an RMT testing machine and an SPHB impact testing machine. Under quasistatic loading, the failure modes of the specimens with different length-diameter ratios are different. The larger the size of the specimen structure is, the greater the probability of defects such as joints and micro cracks is and the smaller the influence of the specimen on the distribution of a three-dimensional stress state is. The rock strength decreases with increasing length-diameter ratio. Using the improved Weibull formula, the size of the specimen is expressed by the volume, and the calculated rock strength of different volumes is similar to the compressive strength from the quasistatic tests. Under dynamic loading, the dynamic compressive strengths of the specimens with different length-diameter ratios are similar, and the failure mode of the specimens is different from that under quasistatic loading. Soon after a crack appears in a specimen, the specimen splits. As the size of the specimens decreases, the fragments size to approach the millimeter scale. By improving the Weibull distribution formula and considering variation in strain rate caused by the size of the specimen, the dynamic compressive strength of rocks of different volumes is calculated by introducing the critical strain rate and related parameters, and the results are similar to the experimental dynamic compressive strength obtained. The improved Weibull formula based on the strength size effect can accurately describe the quasistatic and dynamic compressive strength laws.

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“…For concrete-like materials, a significant number of studies indicated that the enhancement of compressive strength at high loading rate was mainly caused by a combination of fundamental material behavior and inertial confinement effects [21][22][23]. ese analyses provided a reference for the study of the loading rate effect on earth materials.…”

Section: Introductionmentioning

confidence: 99%

Influences of Specimen Geometry and Loading Rate on Compressive Strength of Unstabilized Compacted Earth Block

Lan

Wang

Chao

2018

Advances in Materials Science and Engineering

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Loading rate and specimen geometry are critical parameters used in simple compressive tests to determine the strength of earth materials. In this study, cubic and cylindrical unstabilized compacted earth block of different sizes were manufactured and tested in unconfined compression to investigate the size and shape effects on the compressive strength of earth materials under different loading rates. e correlation between the compressive strength of earth materials and the geometric parameters of the specimen was determined. e recommended loading rate and sample for testing the compressive strength of earth materials were given. Finally, a constitutive model for describing the stress-strain response of earth materials was proposed. is model modifies the defects of the constitutive equations suggested in previous studies and may be applied to the numerical analysis of earth structure.

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Experimental investigation of the size effect of layered roller compacted concrete (RCC) under high-strain-rate loading

Cited by 71 publications

References 39 publications

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

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

Study on the Rock Size Effect of Quasistatic and Dynamic Compression Characteristics

Influences of Specimen Geometry and Loading Rate on Compressive Strength of Unstabilized Compacted Earth Block

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