Kinematic and inertial forces in pile foundations under seismic loading

Hussien, Mahmoud N.; Karray, Mourad; Tobita, Tetsuo; Iai, Susumu

doi:10.1016/j.compgeo.2015.05.011

Cited by 29 publications

(5 citation statements)

References 32 publications

(62 reference statements)

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“…The primary pile-bridge seismic demand sources are the coupling of bridge inertia and soil-pile kinematic load. Although many studies have been devoted to this subject, 25,41,47,70,71 the contributions of the inertial and kinematic effects to seismic demand are still unclear. This is due to the inherent complexity of the soil-pile-structure interaction, especially involving liquefaction-induced lateral spreading.…”

Section: Evaluation Of Kinematic and Ineratial Effectsmentioning

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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Section: Evaluation Of Kinematic and Ineratial Effectsmentioning

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

View full text Add to dashboard Cite

show abstract

“…This is a simplification given that the frequency and amplitude of seismic waves tend to alter while propagating through the soil media [19]. Vertical propagation of Swaves may induce additional bending moments through soil-pile kinematic interaction [42][43][44]. Given the lack of stratigraphic geotechnical details, it is neither possible to perform a site response and wave propagation analysis nor to develop a free-field soil column connected to soil springs, therefore, excitations are deemed uniform along the pile length.…”

Section: Load Modelingmentioning

confidence: 99%

Seismic assessment of wind turbines: How crucial is rotor-nacelle-assembly numerical modeling?

Ali

Risi

Sextos

2021

Soil Dynamics and Earthquake Engineering

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“…Carbonari et al [25] presented an analytical, closed-form solution for dynamic stiffness and kinematic response of single batter piles. Indeed, a few authors have carried out non-linear studies using vertical and batter piles, [26][27][28][29][30] but kinematic interaction of batter pile groups in non-linear soil has yet to be investigated.…”

Section: Introductionmentioning

confidence: 99%

Kinematic response of vertical and batter pile groups in non‐linear soft soil

Cemalovic

Husebø

Kaynia

2022

Earthq Engng Struct Dyn

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This paper presents a comprehensive numerical study on kinematic response of vertical and batter pile groups in soft soil, where soil non-linearity, batter angle, pile spacing and excitation frequency are related to pile-cap displacements, rotations, maximum pile moments, shear forces and axial forces. The finite element model is constructed in OpenSees MP, and parallel computing is utilized for a better (faster) performance. Results reveal that soil non-linearity has a profound impact on the kinematic interaction. Increasing batter angle decreases horizontal displacements but increases rotations. Batter pile groups yield lower spectral accelerations compared to vertical pile groups. For high 𝑃𝐺𝐴, the spectral accelerations of the pile-cap may be lower compared to the spectral acceleration of the seismic input motion. Estimation using non-linear interaction factors conservatively estimates pile-cap displacements and rotations, while roughly captures the effects with respect to batter angle and frequency content within the specified framework.

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Kinematic and inertial forces in pile foundations under seismic loading

Cited by 29 publications

References 32 publications

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

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

Seismic assessment of wind turbines: How crucial is rotor-nacelle-assembly numerical modeling?

Kinematic response of vertical and batter pile groups in non‐linear soft soil

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