Mechanical Damage and Failure Behavior of Shaft-Lining Concrete after Exposure to High Pore-Water Pressure

Xue, Weipei; Yao, Zhishu; Jing, Wei; Song, Haiqing

doi:10.1061/(asce)mt.1943-5533.0002922

Cited by 12 publications

(11 citation statements)

References 17 publications

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“…Zhang et al 44 concluded that the gain effect of viscous effect on strength at high water pressure and large strain rate is greater than the weakening effect of water pressure Water pressure usually causes deterioration of the uniaxial mechanical performance of concrete, resulting in a decrease in uniaxial strength. 11,21,22,40,42 However, due to the actual working conditions, concrete used in a water environment is in a complex stress state. Based on this, Bjerkeli et al 24 applied water-confining pressure to concrete during compression and found that external water pressure caused pore water pressure of concrete.…”

Section: Evolution Characteristics Of Mechanical Performancementioning

confidence: 99%

“…76 For static loading, pore water tends to flow, which promotes concrete cracking and microcracks propagation. 9,42,77,78 Figure 8 shows the changes in internal micro-structure of concrete under different pore water pressures and different water pressure duration. 42 It can be seen that with the increase of pore water pressure and the extension of duration, the microcracks propagation is more obvious.…”

Section: Internal Pore Water Effectmentioning

confidence: 99%

“…9,42,77,78 Figure 8 shows the changes in internal micro-structure of concrete under different pore water pressures and different water pressure duration. 42 It can be seen that with the increase of pore water pressure and the extension of duration, the microcracks propagation is more obvious. The main microcracks are connected to multiple secondary microcracks.…”

Section: Internal Pore Water Effectmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Evolution Characteristics Of Mechanical Performancementioning

confidence: 99%

Section: Internal Pore Water Effectmentioning

confidence: 99%

Section: Internal Pore Water Effectmentioning

confidence: 99%

See 1 more Smart Citation

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

Xue

Tong

Alam

et al. 2023

Structural Concrete

Self Cite

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“…When other conditions are the same, the larger the maximum aggregate particle size, the greater the compressive strength loss rate is. Xue et al (Xue et al, 2020) observed that under high pore water pressure, the uniaxial compressive strength of concrete decreased with an increase in the exposure time and water pressure. At this instant, the uniaxial load exhibits four stages: elastic, stable crack propagation, unstable crack propagation, and failure.…”

Section: Effect Of Pore Water On the Static Strength Of Concretementioning

confidence: 99%

The mechanical properties of concrete in water environment: A review

Wang

Sun

et al. 2022

Front. Mater.

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The service performance of concrete structures in a water environment differs from that in a normal environment. An accurate evaluation of the mechanical properties and service status of wet concrete is related to the reliable design and safe operation of concrete structures, e.g., hydraulics, marine engineering, bridges, and tunnels. To promote the application of new and high-performance concrete to complex water environments and grasp the future development trend, the research progress on the service performance of concrete in water environments was reviewed worldwide. Starting from the internal water content of concrete, the existing research is combed, the influence of water content, water pressure, and loading rate on the static and dynamic characteristics of concrete in a water environment is summarized, and the influence mechanism is analyzed. The literature review demonstrates that the static compressive strength of wet concrete is lower than that of dry concrete; however, the elastic modulus improves. With an increase in the strain rate, the compressive strength of wet and dry concretes improves, and the rate sensitivity of the wet concrete is greater than that of the normal concrete. Pore structure characteristics mainly affect the static strength of the wet concrete. The improvement in the dynamic strength of the wet concrete is caused by the combined effect of the concrete rate sensitivity, “Stefan” effect, and water pressure.

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“…Further, water readily penetrates the concrete under higher pressure, leading to degradation of its internal mechanical properties. Although the static and fatigue behavior of concrete are well understood in shallow seas [16][17][18][19][20][21][22][23], the effect of the high water pressures experienced in deep seas has still not yet been considered in practice [24][25][26]. Thus, the response of concrete to sustained and repeated high water pressure, including its effect on uniaxial compression strength and the bond strength with steel bars, needs to be investigated together with its damage evolution.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of Repeated High Water Pressure on the Compressive and Bond Strength of Concrete with/without Steel Bar

2021

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The application of reinforced concrete for permanent and temporary deep ocean structures has recently become more prevalent; however, the static and dynamic effects of high water pressure on concrete remain unexplored. This paper investigates the influence of high water pressure (60 MPa) on four series of concrete cylinders with and without an embedded steel bar under sustained and cyclic loading conditions. The residual compressive strength, bond strength, and associated evolution of surface and internal damage are evaluated after exposing concrete cylinders to a water pressure of 60 MPa. The first series is exposed to sustained water pressure for 7 and 60 days, while the other series is tested under repeated water pressure for 10, 20, 30, 60, and 150 cycles. The results reveal that residual compressive strength falls immediately by 16% within 7 days of sustained high water pressure, but the strength then remains stable up to 60 days. Under repeated high water pressure, residual compressive strength gradually reduces by up to 40% until 60 cycles, after which it remains reasonably stable until 150 cycles as crack propagation is arrested at a certain depth within the concrete cylinders. The bond strength between the steel bar and matrix is observed to decrease considerably under repeated cycles of 60 MPa water pressure up to 26%. The damage gradually propagates at the matrix/steel bar interface under the repeated water pressure, resulting in a reduction in residual pullout capacity.

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Mechanical Damage and Failure Behavior of Shaft-Lining Concrete after Exposure to High Pore-Water Pressure

Cited by 12 publications

References 17 publications

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

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

The mechanical properties of concrete in water environment: A review

Investigating the Effect of Repeated High Water Pressure on the Compressive and Bond Strength of Concrete with/without Steel Bar

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