Effect of water pressure on mechanical behavior of concrete under dynamic compression state

Wang, Qianfeng; Liu, Yunhe; Gang, Peng

doi:10.1016/j.conbuildmat.2016.08.058

Cited by 45 publications

(42 citation statements)

References 31 publications

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“…is finding is close to the results of [34,[47][48][49], which also stated that the grading of aggregates may be one of the factors that influence the value of ultimate strength [47]. e strength of concrete decreased as water pressure increased at a strain rate of 10 −5 •s −1 [3], which is contrary to the findings of this study. is phenomenon may be primarily due to the different concrete conditions before the triaxial test.…”

Section: Influence Of Water Pressure On Dynamic Mechanicalsupporting

confidence: 79%

“…Wang et al [34] evaluated the coupled effects of water content and loading rate on the properties of concrete. ey reported that a high water content of concrete corresponds to high sensitivity; this finding is consistent with that of [3]. However, few studies have been conducted on the dynamic performance change of concrete under triaxial compression stress after F-T cycles, hence proving the importance of this research.…”

Section: Introductionsupporting

confidence: 83%

“…e effect of damping caused by the viscous stress could also slow down the expansion of microcracks for the concrete failure mode of slant shear. Finally, the strength of concrete increased [3].…”

Section: Ultimate Compressive Strengthmentioning

confidence: 93%

“…is phenomenon may be primarily due to the different concrete conditions before the triaxial test. In this study, specimens were cured in water, whereas in [3], concretes were placed in a natural environment for 1200 days. Researchers [50,51] noted that water will flow to the crackle tip and destroy the capillary structure of the dry concrete matrix under the action of water pressure.…”

Section: Influence Of Water Pressure On Dynamic Mechanicalmentioning

confidence: 99%

“…Numerous studies have been conducted to investigate the effect of strain rate on concrete characteristics, such as compressive strength, peak strain, elastic modulus, and flexural and tensile strength. Wang et al [3] reported the effect of water pressure on the mechanical properties of concrete and established failure modes, which were affected by strain rate and water content. Yan and Lin [4] evaluated concrete dynamic strength and deformation properties under initial static stress and found that total deformation of concrete was greatly influenced by initial static loading history.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State

Wang

et al. 2019

Advances in Materials Science and Engineering

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This study aims at determining the effect of water pressure on the mechanical properties of concrete subjected to freeze-thaw (F-T) attack under the dynamic triaxial compression state. Two specimens were used: (1) a 100 mm × 100 mm × 400 mm prism for testing the loss of mass and relative dynamic modulus of elasticity (RDME) after F-T cycles and (2) cylinders with a diameter of 100 mm and a height of 200 mm for testing the dynamic mechanical properties of concrete. Strain rates ranged from 10−5·s−1 to 10−3·s−1, and F-T cycles ranged from 0 to 100. Three levels of water pressure (0, 5, and 10 MPa) were applied to concrete. Results showed that as the number of F-T cycles increased, the mass loss rate of the concrete specimen initially decreased and then increased, but the RDME decreased. Under 5 MPa of water pressure and at the same strain rate, the ultimate compressive strength decreased, whereas the peak strain increased with the increase in the number of F-T cycles. This result is contrary to the variation law of ultimate compressive strength and peak strain with the increase in strain rate under the same number of F-T times. With the increase in F-T cycles or water pressure, the strain sensitivity of the dynamic increase factor of ultimate compressive strength and peak strain decreased, respectively. After 100 F-T cycles, the dynamic compressive strength under all water pressure levels tended to increase as the strain rate increased, whereas the peak strain decreased gradually.

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Section: Influence Of Water Pressure On Dynamic Mechanicalsupporting

confidence: 79%

Section: Introductionsupporting

confidence: 83%

Section: Ultimate Compressive Strengthmentioning

confidence: 93%

Section: Influence Of Water Pressure On Dynamic Mechanicalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State

Wang

et al. 2019

Advances in Materials Science and Engineering

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Evolution characteristics and mechanism of concrete performance under water pressure environment: A comprehensive review

Xue

Tong

Alam

et al. 2023

Structural Concrete

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Compared with the ground service environment, the evolution of concrete performance under a water pressure service environment is quite complex with variable conditions. Because of the coupling effect of load and pressure, water has a special impact on the strength and deformation of concrete. Meanwhile, harmful ions usually react with the cement matrix as pressure water seepages into concrete, resulting in the reduction of concrete durability. Based on this, this study provides a comprehensive review of the strength, deformation, and durability of concrete under water pressure environment. It is found that microcracks in concrete tend to propagate and connect after exposure to water pressure, leading to a decrease in strength and deformation performance. The average loss rate of strength and elastic modulus increased by 12.15% and 10.97%, respectively, when water pressure increased by 1 MPa. However, the loading process of water‐confining pressure makes concrete more compact, where the static and dynamic mechanical performance can be improved. Besides, due to the enhancement of excess pore water pressure, concrete strength under a high strain rate increases by 61.79% compared to static load. The effect of water pressure increases the ability of the liquid to penetrate concrete, and corrosive ions trapped within the liquid and freeze–thaw caused by external temperature changes would further reduce the concrete durability. This study points out that static and dynamic loading characteristics and durability of concrete under multi‐factor coupling in a water pressure environment will be the future research direction. The summarized contents can provide guidance for construction and research of concrete engineering under a water pressure environment.

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Effects of aggregate crushing and strain rate on fracture in compressive concrete with a DEM-based breakage model

Nitka,

Tejchman

2024

Granular Matter

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This study looked at how breakable aggregates affected the mesoscopic dynamic behavior of concrete in the uniaxial compression condition. In-depth dynamic two-dimensional (2D) studies were conducted to examine the impact of aggregate crushing and strain rate on concrete’s dynamic strength and fracture patterns. Using a DEM-based breakage model, concrete was simulated as a four-phase material consisting of aggregate, mortar, ITZs, and macropores. The concrete mesostructure was obtained from laboratory micro-CT tests. Collections of spherical particles were used to imitate aggregate breakage of different sizes and shapes by enabling intra-granular fracturing between them. The mortar was described in terms of unbreakable spheres with different diameters. Compared to the mortar, the aggregate strength was always stronger. A qualitative consistency was achieved between the DEM results and the available experimental data. Concrete’s dynamic compressive strength rose significantly with strain rate and just somewhat with aggregate strength. The fracture process was impacted considerably by aggregate crushing and strain rate. The number of broken contacts grew with an increase in strain rate and a decrease in aggregate strength.

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Effect of water pressure on mechanical behavior of concrete under dynamic compression state

Cited by 45 publications

References 31 publications

Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State

Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State

Evolution characteristics and mechanism of concrete performance under water pressure environment: A comprehensive review

Effects of aggregate crushing and strain rate on fracture in compressive concrete with a DEM-based breakage model

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