Development of predicting method for dynamic pile behavior by using centrifuge tests considering the kinematic load effect

Yoo, Mintaek; Han, Jin-Tae; Choi, Jung-In; Kwon, Sun-Yong

doi:10.1007/s10518-016-9998-0

Cited by 11 publications

(11 citation statements)

References 13 publications

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“…Thus, the kinematic force induced by soil movement acting on the single pile was in the opposite direction with the inertia force introduced by deck mass. This observation was similar to the study on the single pile in the horizontal ground of dry sand reported by Yoo et al (2017). The deck displacements of two pile groups were led by the input displacement.…”

Section: Calculation Of Pile Displacementsupporting

confidence: 91%

“…The kinematic force could be either in phase or out of phase with the inertial force according to the relative difference in the natural period between the ground and superstructure. Yoo et al (2017) performed a series of centrifuge shaking table tests to examine the kinematic effect for free head single piles under seismic excitation. The pile displacement induced by the inertial force was in the opposite phase with that generated by the kinematic force.…”

Section: Introductionmentioning

confidence: 99%

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Kinematic and Inertial Interaction of Single and Group Piles in Slope by Displacement Phase Relation

Tran

Bong

Kim

2020

Journal of Earthquake Engineering

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This study evaluated the phase relationship among the input motion, ground response, and pile response, which is a key consideration in the analysis of the kinematic-inertial interaction for piles. Dynamic centrifuge tests were conducted on single and group piles embedded in slopes of dry sands. Test results showed that the single pile moved in the opposite phase with the ground movement, whereas the group piles moved nearly in phase. The phase relationship was significantly affected by rocking motion. Therefore, the kinematic force acted as a resistance to the single pile and an additional load to the pile group.

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Section: Calculation Of Pile Displacementsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Kinematic and Inertial Interaction of Single and Group Piles in Slope by Displacement Phase Relation

Tran

Bong

Kim

2020

Journal of Earthquake Engineering

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“…In field conditions, both the kinematic and inertial loads occur together and therefore, it is difficult to understand their individual role on the overall pile dynamic behaviour. The combined effect of kinematic and inertial loads on the seismic response of pile foundations embedded in non-liquefiable soil layers have been evaluated through finite element or finite difference numerical methods (Cai et al 2000;Maheshwari et al 2004;Chau et al 2009;Luo et al 2016;Wang et al 2017), beam on Winkler foundation analysis (Mylonakis et al 1997;Murono and Nishimura 2000;Shirato et al 2008;Rovithis et al 2009;Kampitsis et al 2013;Rahmani et al 2018), dynamic centrifuge experiments (Wilson 1998;Boulanger et al 1999;Hussien et al 2016;Yoo et al 2017;Garala 2020) and 1g shaking table tests (Meymand 1998;Shirato et al 2008;Pitilakis et al 2008;Chau et al 2009;Hokmabadi 2014;Durante et al 2016). Nevertheless, very few studies focused on the phase relationship between the seismic kinematic and inertial loads for pile foundations as listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Role of Pile Spacing on Dynamic Behavior of Pile Groups in Layered Soils

Garala

Madabhushi

2021

J. Geotech. Geoenviron. Eng.

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This research investigates the influence of pile spacing on the dynamic behaviour of pile groups by performing a series of specifically designed dynamic centrifuge experiments on pile foundations embedded in a two-layered soil profile. A single pile and two 3 × 1 row pile groups with different pile spacing were used as model pile foundations, and the soil models consisted of a soft clay underlain by a dense sand. The influence of earthquake frequency on the dynamic behaviour of two-layered soils is discussed using the centrifuge data and 1D site response analysis from DEEPSOIL. Further, the results of these centrifuge tests agreed with the conviction that the group effects will be diminished with the increase in pile-to-pile spacing in a pile group due to reduced pile-soil-pile interaction. However, this reduced pile group effects can lead to larger kinematic pile bending moments in the widely spaced pile group compared to a closely spaced pile group. Moreover, the single pile always has larger bending moments than both the tested pile groups. An exception to this is when there is a significant phase difference between the kinematic and inertial loads for a single pile but not for the widely spaced pile group. The influence of pile spacing on the shadowing effects and location of peak bending moments in the piles of a group are also discussed. Lastly, an attempt is made to evaluate the individual contribution of inertial and kinematic loads for the seismic design of pile foundations considering soilpile-structure interaction effects.

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“…2. The pile foundations can be affected by inertial forces acting on superstructure and piles, by subgrade reaction force by p-y spring or coefficient of subgrade reaction, and through kinematic forces generated by ground movement [17]. In particular, it has been reported that the effect of the kinematic forces of the ground due to slope failure can cause severe…”

mentioning

confidence: 99%

“…1 Pile supported wharf structure [12] Fig. 2 Force components of pile foundation during earthquake [17] due to liquefaction and that the pile moment greatly increased. Su et al [14] evaluated the performance of a pile-supported wharf through 3D numerical analysis.…”

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confidence: 99%

Dynamic behavior of pile-supported wharves by slope failure during earthquake via centrifuge tests

Yun

Han

2021

Geo-Engineering

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The effects of earthquakes on pile-supported wharves include damage to piles by inertial forces acting on the superstructure, and damage caused by horizontal displacement of retaining walls. Piles can also be damaged through kinematic forces generated by slope failure. Such forces are significant but it is difficult to clearly explain pile damage during slope failure since the inertial force of superstructure and the kinematic force by slope failure can occur simultaneously during an earthquake. In this study, dynamic centrifuge model tests were performed to evaluate the effect of the kinematic force of the ground due to slope failure during earthquake on the behavior of a pile-supported wharf structure. Experimental results indicate that the slope failure in the inclined-ground model caused the deck plate acceleration and pile moment to be up to 24% and 31% respectively greater than those in the horizontal-ground model due to the kinematic force of the ground.

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Development of predicting method for dynamic pile behavior by using centrifuge tests considering the kinematic load effect

Cited by 11 publications

References 13 publications

Kinematic and Inertial Interaction of Single and Group Piles in Slope by Displacement Phase Relation

Kinematic and Inertial Interaction of Single and Group Piles in Slope by Displacement Phase Relation

Role of Pile Spacing on Dynamic Behavior of Pile Groups in Layered Soils

Dynamic behavior of pile-supported wharves by slope failure during earthquake via centrifuge tests

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