Numerical investigation of the dynamic increase factor of ultra-high performance concrete based on SHPB technology

Ren, Liang; Yu, Xiaoquan; Guo, Zhang; Xiao, Linfa

doi:10.1016/j.conbuildmat.2022.126756

Cited by 17 publications

(5 citation statements)

References 19 publications

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“…At present, low-strength and high-strength concrete are widely used in all aspects of construction, so it is necessary to revise the standard, and then put forward the formula applicable to concrete with different strength grades. DIF and lgε 0 were piecewise fitted by referring to the DIF empirical formula proposed by Ross, Grote, and Li et al The fitting results are shown in Figure 13 and Equation (6). From these figure and table, The fitting effect of DIF and lgε 0 is good.…”

Section: Scholarsmentioning

confidence: 97%

“…3,4 The mechanical behavior of concrete under dynamic load is often significantly different from that under static load, and there is strain rate effect. 5,6 Therefore, only by mastering the dynamic mechanical properties of concrete materials can we better guide the actual production work and ensure the safety of people's life when disasters come.…”

Section: Introductionmentioning

confidence: 99%

“…Many experts and scholars have carried out relevant studies on the mechanical properties of concrete under dynamic load, among which spilt Hopkinson pressure bar (SHPB) is widely used in the experimental studies of mechanical properties of materials under medium-high strain rate. [5][6][7] At present, the studies on the dynamic mechanical properties of concrete mainly focuses on changing the temperature, additives, curing age, etc., to explore the effect of these factors on the properties of concrete. [8][9][10][11][12][13] And the effect of strength grade of concrete on its dynamic mechanical properties is less involved.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the dynamic damage of the stress wave to the initial shotcrete during the blasting operation of tunnel, the weapon strike to underground protection engineering, the demolition and blasting of high‐rise concrete buildings, the impaction of seismic wave on the foundations and superstructure of buildings, etc 3,4 . The mechanical behavior of concrete under dynamic load is often significantly different from that under static load, and there is strain rate effect 5,6 . Therefore, only by mastering the dynamic mechanical properties of concrete materials can we better guide the actual production work and ensure the safety of people's life when disasters come.…”

Section: Introductionmentioning

confidence: 99%

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Effect of strength grade on mechanical properties of concrete under dynamic load

Wang

Bai

Huang

et al. 2022

Structural Concrete

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The uniaxial compression test and dynamic compression test of C30, C50, and C80 concrete were carried out. The effects of strength grade and strain rate (ε 0 ) on dynamic mechanical properties of concrete were analyzed in terms of dynamic compressive strength, dynamic increase factor (DIF), dynamic peak strain, and dynamic peak toughness. And the strain rate sensitivity of mechanical indexes and DIF fitting model of concrete with different strength grades were explored. The results show that the dynamic compressive strength, DIF and dynamic peak toughness of concrete with different strength grades all have obvious strain rate effects. With the increase of strength grade of concrete, the dynamic peak strain of concrete decreases continuously, and the strain rate sensitivity of dynamic compressive strength and dynamic peak toughness of concrete increases continuously. The mechanical indexes of C80 concrete have the strongest sensitivity to the strain rate. The DIF empirical formula of Comite Euro-International du Beton (CEB) cannot fit the DIF of C30 and C80 concrete effectively. There is a critical strain rate beyond which the strain rate effect of DIF is significantly enhanced. With the increase of strength grade of concrete, the critical strain rate of concrete decreases continuously. The piecewise linear fitting of DIF and lgε 0 of concrete with different strength grades shows good results.

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Section: Scholarsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of strength grade on mechanical properties of concrete under dynamic load

Wang

Bai

Huang

et al. 2022

Structural Concrete

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“…With a strain rate ranging from 10 to 10 3 s -1 , the Split Hopkinson Pressure Bar (SHPB) is utilized to study dynamic loads caused by explosions or impacts. This is used to model the impact loads that rocks encounter during real mine blasting operations, including situations where static loads are present first and dynamic loads are applied later [8][9][10][11][12][13][14]. Two cylindrical rock specimens were created by Li JC [15], one of which had numerous grooves simulating rock joints on the contact side of the other specimen.…”

Section: Introduction：mentioning

confidence: 99%

Investigation on Dynamical Mechanics of Rock-Backfill Composite Samples under SHPB Test

Ma,

Zhang,

Yang

2024

Preprint

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In blast-induced caving mining employing backfilling techniques, understanding the mechanism of interaction and evolution of deformation between rock and backfill under coupled conditions has become essential. In order to perform dynamic uniaxial impact testing at high strain rates utilizing the Split Hopkinson Pressure Bar (SHPB) test technique, this research produced coupled specimens of rock and cemented tailing backfill (CTB). The coupled body's stress-strain curves at various strain rates were measured, and the failure processes behind them were examined. Using GDEM software, a coupled model of SHPB rock-CTB was created in order to examine the internal variations in stress wave velocity as well as the evolution of cracks in the coupled specimens. According to experimental results, the dynamic compressive strength of the connected body increases first, falls later, and finally stabilizes when the average strain rate (ASR) increases from 27.45 s− 1 to 68.73 s− 1. At typical strain rates below 60 s− 1, the stress-strain curve displays a "stress drop" type, and at rates over 60 s− 1, a "stress rebound" type. When the ASR is below 55 s− 1, the energy absorption progressively increases; when it is above 55 s− 1, it reduces and then increases again. The simulation results validate the validity of the experimental conclusions by showing that transverse and longitudinal cracks occur on the surface of the backfill, with greater deformation observed on the side in contact with the transmission bar compared to the side in contact with the rock.

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Engineering high-performance cementitious matrices for improved projectile impact resistance with silane, micro fibrillated cellulose and fine calcined bauxite aggregate

Zhong¹,

Zhang²

2023

Cement and Concrete Composites

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Numerical investigation of the dynamic increase factor of ultra-high performance concrete based on SHPB technology

Cited by 17 publications

References 19 publications

Effect of strength grade on mechanical properties of concrete under dynamic load

Effect of strength grade on mechanical properties of concrete under dynamic load

Investigation on Dynamical Mechanics of Rock-Backfill Composite Samples under SHPB Test

Engineering high-performance cementitious matrices for improved projectile impact resistance with silane, micro fibrillated cellulose and fine calcined bauxite aggregate

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