Shaking Table Tests on Seismic Responses of Pile-soil-superstructure in Coral Sand

Wu, Qi; Ding, Xuanming; Chen, Zhixiong; Zhang, Yanling

doi:10.1080/13632469.2020.1803160

Cited by 24 publications

(4 citation statements)

References 57 publications

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“…As one of the most common foundation forms, it is of great significance to study the application of pile foundations to calcareous sand, especially to explore the effect of pile driving and engineering mechanical properties in calcareous sand foundations. Up to now, previous studies have mostly focused on the macroscopic mechanical properties of pile foundations in calcareous sand [20][21][22][23][24], and have mainly considered the effects of the calcareous sand particle size distribution [25], cementation degree, pile length [26,27] and load conditions [28][29][30][31][32] on the bearing characteristics of piles. McDowell et al [33], using small-size model tests on the bearing characteristics of a single pile, pointed out that the peek resistance of a single pile is a strong function of the initial particle size distribution, and the peak resistance in well-graded calcareous sand is greater than that in uniformly graded calcareous sand.…”

Section: Introductionmentioning

confidence: 99%

Pile Driving and the Setup Effect and Underlying Mechanism for Different Pile Types in Calcareous Sand Foundations

Gao,

Guo,

Yuan

2024

JMSE

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The mechanical response and deformation characteristics in calcareous sand foundations during pile driving and setup were studied using model tests combined with the technical methods of tactile pressure sensors and close-range photogrammetry. Different types of piles were considered, including a pipe pile, square pile and semi-closed steel pipe pile. The test results show that during pile driving, the pile tip resistance of different piles increases with an increase in the pile insertion depth, and an obvious fluctuation is also obtained due to the particle breakage of the calcareous sand and energy dissipation. Different degrees of particle breakage generated by different type piles make the internal stress variations different, as with the pile tip resistance. The pile tip resistance of model pile A, which simulates a pipe pile, is the highest, followed by model pile B, the simulated square pile. Model pile C, which simulates a semi-closed steel pipe pile, has the smallest pile tip resistance because its particle breakage is the most obvious and the pile tip energy cannot be continuously accumulated. The induced deformation such as sag or uplift on the surface and the associated influence range for the calcareous sand foundation are the smallest for model pile C, followed by model pile B and then model pile A. Model pile A has the most obvious pile driving effect. During the pile setup process after piling, the increase in the total internal stress of model pile B is the largest, and the improvement of the potential bearing capacity is the most obvious, followed by model pile A and model pile C. During the pile setup, the induced uplift deformation in pile driving is recovered and the potential bearing capacity increases due the redistribution and uniformity of the vertical and radial stress distributions in the calcareous sand foundation. Considering the potential bearing capacity of different model piles, the influence range of pile driving, foundation deformation and the pile setup effect, it is suggested to use a pointed square pile corresponding to model pile B in pile engineering in calcareous sand foundations.

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Section: Introductionmentioning

confidence: 99%

Pile Driving and the Setup Effect and Underlying Mechanism for Different Pile Types in Calcareous Sand Foundations

Gao,

Guo,

Yuan

2024

JMSE

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“…On the other hand, the 1-g shaking tests can reproduce the seismic response of the structure and soil. [41][42] In addition, dense sensors arrangement can be incorporated to provide more detailed data. 43 Furthermore, materials with smaller scaling down (e.g., reinforced concrete) can be used.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the 1‐g shaking tests can reproduce the seismic response of the structure and soil 41–42 . In addition, dense sensors arrangement can be incorporated to provide more detailed data 43 .…”

Section: Introductionmentioning

confidence: 99%

Inertial and kinematic interactions of bridge‐pile group subjected to liquefaction induced lateral spreading: Large‐scale shaking table experiments

Jia

Naggar

et al. 2023

Earthq Engng Struct Dyn

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This paper investigates the seismic bridge‐pile‐soil system failure mechanisms due to liquefaction‐induced lateral spreading. Two large‐scale shaking table tests were performed on pile groups with and without bridges in sloped liquefiable soils overlain by soil crust. The systems were subjected to a weak earthquake signal (Tabas 0.05 g) and a strong earthquake signal (Tabas 0.3 g). Their responses were recorded in terms of excess pore pressure, acceleration, and displacement time histories. The piles seismic failure mode and mechanism are described based on the obtained results. In addition, the inertial and kinematic interaction effects on the piles’ deflection were evaluated. The results demonstrated that the bridge had no significant effect on the seismic response of the pile‐soil system under weak earthquakes. Meanwhile, the test model without a bridge experienced more significant soil lateral displacement, and the saturated sand exhibited dilatant behavior, and amplified the acceleration peak response during the strong earthquake. Moreover, the liquefaction‐induced lateral spreading moved the vulnerable position of the pile group bridge system from the pier bottom to the pile head, which changed the failure mode of the pile head. The results also revealed that, compared with weak earthquake excitation, the kinematic effect was significantly enhanced, and the inertia effect was weakened during strong earthquakes. Moreover, the pile curvature during both weak and strong earthquakes was inversely proportional to the bridge inertial load.

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“…Rajib et al [35] studied the effect of SSI under different intensity sine wave excitations and found that the base shear of the structure may significantly increase considering SSI. Wu et al [36] also used sine waves to study the SSI effect in coral sand and found that the horizontal displacement of the superstructure, bending moment of the columns and piles in coral sand site are smaller than that in the quartz sand site. Liang et al [37] carried out multiple shaking table tests to study the transverse response of pile group foundation, and also proposed that it is not appropriate to simulate the superstructure with a single degree of freedom system.…”

Section: Introductionmentioning

confidence: 99%

Effect of soil-pile-structure interaction on seismic behaviour of nuclear power station via shaking table tests

et al. 2021

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Shaking Table Tests on Seismic Responses of Pile-soil-superstructure in Coral Sand

Cited by 24 publications

References 57 publications

Pile Driving and the Setup Effect and Underlying Mechanism for Different Pile Types in Calcareous Sand Foundations

Pile Driving and the Setup Effect and Underlying Mechanism for Different Pile Types in Calcareous Sand Foundations

Inertial and kinematic interactions of bridge‐pile group subjected to liquefaction induced lateral spreading: Large‐scale shaking table experiments

Effect of soil-pile-structure interaction on seismic behaviour of nuclear power station via shaking table tests

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