Pullout resistance of group suction anchors in parallel array installed in silty sand subjected to horizontal loading – Centrifuge and numerical modeling

Kim, Surin; Choo, Yun Wook; Kim, Jae Hyun; Kim, Dong-Soo; Kwon, Oh Kyung

doi:10.1016/j.oceaneng.2015.07.037

Cited by 28 publications

(5 citation statements)

References 16 publications

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“…The 3D finite difference software based on fast lagrangian analysis of continua, FLAC3D, was used for the numerical modeling of the prototype suction anchor. The model was created with 60,925 zones and 66,540 grid points, and its meshing and geometry shown in Figure 11 According to the similarity principle, the prototype suction anchor's numerical results can be compared to the prototype results converted from the test [13,37]. The anchoring force and displacement of the prototype suction anchor can be obtained from the test results based on the similarity relationship shown in Table 1.…”

Section: Numerical Modeling On the Prototype Suction Anchor Used In T...mentioning

confidence: 99%

“…Wang and Li [33], Cheng et al [34], and Lee and Do [35] performed a 1 g scale model test to study the deformation and loading capacity of suction anchors. Andersen et al [36], Kim et al [37], and Zhu et al [38] conducted centrifugal model tests to study the installation process and pullout bearing performance of suction anchors. Among these test methods, the centrifugal model test can reflect the natural stress state of the seabed [39], which can accurately simulate the loading process of suction anchors using small models.…”

Section: Introductionmentioning

confidence: 99%

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Failure Behavior and Surrounding Soil Stress Responses of Suction Anchor in Low-Strength Muddy Clay

Luo,

Liu,

Liu

et al. 2023

JMSE

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Anchorage failure of a suction anchor is more likely to occur in low-strength muddy clay. This paper focuses on the failure behaviors of suction anchors and muddy clay stress responses. The centrifugal model test was used to study the loading processes of suction anchors with various pulling angles. Firstly, the multi-stage developing process of anchoring force was analyzed according to the test results. Numerical modeling was used to validate the test results. The displacement of the suction anchor and muddy clay soil were analyzed using the numerical results. Then, the numerical and testing results were compared to analyze the horizontal soil pressure responses around the suction anchors. It was found that the change in loading direction affected the distribution and development of soil stress. The horizontal soil resistance played a crucial role in improving the bearing capacity. The soil stress variation and anchor displacement revealed that the suction anchors exhibited multi-attitude coupling movement during the inclined pulling. The vertical pulling suction anchor showed shear–slip failure behaviors, while the inclined pulling suction anchors showed compression–shear–slip coupling failure behaviors. The results of this study provide insight into the interaction mechanism between suction anchors and muddy clay, serving as a reference for the design and application of suction anchors.

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Section: Numerical Modeling On the Prototype Suction Anchor Used In T...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Failure Behavior and Surrounding Soil Stress Responses of Suction Anchor in Low-Strength Muddy Clay

Luo,

Liu,

Liu

et al. 2023

JMSE

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“…Efficiency. The uplift capacity efficiency of group anchors is generally obtained by dividing the group capacity by the number of group anchors multiplied by a single anchor's capacity [16].…”

Section: Analysis Of Group Anchormentioning

confidence: 99%

“…However, most of researches have been performed through numerical modelling. Kim et al [16] analyzed the effects of the anchor spacing and embedding ratio on the group anchor effect by developing a centrifugal model of group anchors in chalk sands. Li et al [17] used the numerical analysis software FINAL to simulate the development and anchoring of flood relief slopes for three-dimensional analysis of excavation and reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Research on the Bearing Mechanism of Group Anchors in Sand

Wang

Zhang

2022

Geofluids

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To investigate the bearing mechanism and efficiency of group anchors in sand, upward pulling tests of model group anchors were carried out for different conditions of the sand density, anchor burial depth ratio, and anchor spacing. The results show that the load-displacement relationships for group anchors is similar to that for single anchors, both being nonlinear for the same relative density and embedment ratio. The load-carrying capacity of group anchors is not a simple superposition of the capacities of two single anchors, but has a clear superposition effect, depending on the relative density, embedment ratio, and anchor spacing. The load carrying capacity increases with the anchor spacing up to a limiting critical value. The bearing mechanism of group anchors was qualitatively analyzed and quantitatively characterized using the strain field and shear stress field obtained through the digital image correlation. Adopting the test data and theoretical derivation, a critical anchor spacing equation is proposed and the relationship between critical anchor spacing, embedment ratio, and relative density is quantitatively characterized. Theory is proposed for predicting the group efficiency of group anchors with different configurations. Comparisons between the results of the developed model and experimental results reported in the literature show good agreement.

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“…To ensure the stability of deep foundation pits and slopes, the reinforcement effect of multirow piles as well as prestressed anchor cables on deep foundation pits and slopes was investigated thoroughly through engineering monitoring and other means. The timeliness of data during construction was improved to provide a reference for the construction information on related working conditions [21][22][23][24]. Joseph [25] used a total of four different types of reinforcement materials and four different internal diameter circular foundation models to investigate the effect of the foundation chronology ratio on the bearing capacity of sand layers under different reinforcement conditions.…”

Section: Introductionmentioning

confidence: 99%

The Bearing Characteristics of Sand Anchors under Vibrating Load

Dong

Zhang

et al. 2023

Applied Sciences

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In particular environments, such as the Gobi Desert, the problems encountered in a project are complex, resulting in reduced stability of the anchoring system and multiple forms of failure. This paper takes the factors influencing the stability of sand anchors under vibration loads as the research background. Theoretical analysis and indoor model tests were used to study the load-bearing performance of sand anchors under vibration loads; in addition, a comparative analysis of this performance along with failure forms of sand anchor systems, various sand soil moisture contents, and vibration parameters was performed. The results of the study showed that as the water content becomes higher, the cohesive force of the sand decreases and produces a higher displacement in the water content, with most of the anchor solids becoming prone to fatigue failure. When the water content and vibration frequency remain stable and the vibration amplitude increases, the anchor rod is disturbed after the ultimate pullout bearing capacity forms a decreasing trend, with a decline rate of approximately 40%. By keeping the water content and vibration amplitude stable and changing the vibration frequency, the ultimate pullout capacity of the anchor does not change significantly, and the frequency reaches a certain level when it attains a compacting effect on the surrounding soil and thus has less influence on the anchor. The anchor pullout resistance bearing is most sensitive to the change in sand moisture content, more sensitive to the vibration amplitude, and less sensitive to the vibration frequency, but its correlation is not significant.

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Pullout resistance of group suction anchors in parallel array installed in silty sand subjected to horizontal loading – Centrifuge and numerical modeling

Cited by 28 publications

References 16 publications

Failure Behavior and Surrounding Soil Stress Responses of Suction Anchor in Low-Strength Muddy Clay

Failure Behavior and Surrounding Soil Stress Responses of Suction Anchor in Low-Strength Muddy Clay

Experimental and Theoretical Research on the Bearing Mechanism of Group Anchors in Sand

The Bearing Characteristics of Sand Anchors under Vibrating Load

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