Effects of inertial and kinematic interaction on seismic behavior of pile with embedded foundation

Tokimatsu, Kohji; Suzuki, Hiroko; Satô, Masayoshi

doi:10.1016/j.soildyn.2004.11.018

Cited by 154 publications

(66 citation statements)

References 6 publications

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“…On the other hand, in the case where the fundamental natural period of the superstructure is longer than that of the surface ground, the SRSS is appropriate. Although this general property is known partially in the practical design [6,8,9], more comprehensive investigation has been conducted.…”

Section: Discussionmentioning

confidence: 99%

“…In the evaluation of the bending moment in a pile, both the effect of the forced displacement of a free-field ground (action 1) and the effect of the inertial force from a superstructure (action 2) as shown in Fig.1 have to be taken into account in an appropriate manner (for example [1][2][3][4][5][6][7][8][9][10][11]). However these two effects have different characteristics and it seems difficult to include these in a simple way keeping a reasonable accuracy.…”

Section: Conventional Methods For Estimating Seismic Pile Responsementioning

confidence: 99%

“…This property certainly guarantees the insensitive characteristic of the pile bending moment to the change of the soil-pile spring stiffness (inclusion of the earth pressure). Although it is explained in [8,9] that the embedment of a foundation usually reduces the pile stress in a non-liquefaction case, it seems that its effect depends on the model investigated. Further investigation will be necessary to include this effect in a more reliable manner.…”

Section: Earth Pressure Effectmentioning

confidence: 99%

“…The relation between the inertial response and the kinematic response in the evaluation of the maximum pile-head bending moment has been investigated by Murono and Nishimura [6], Tokimatsu et al [8,9]. However the proposal of more comprehensive analysis methods is desired and this can be done efficiently and effectively by combining the response spectrum method proposed in [10] with a new method for evaluating the inertial response.…”

Section: Treatment Of Design Response Spectrum At Engineering Bedrockmentioning

confidence: 99%

“…In [8,9], the effect of the earth pressure acting on the embedded foundation is considered. The focusing point in this paper is to investigate the accuracy and reliability of the superposition method even for a simple case without the earth pressure.…”

Section: Earth Pressure Effectmentioning

confidence: 99%

See 4 more Smart Citations

Unified analysis of kinematic and inertial earthquake pile responses via the single-input response spectrum method

Kojima

Fujita

Takewaki

2014

Soil Dynamics and Earthquake Engineering

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In the seismic response of a structure-pile-soil system, a kinematic response due to the forced displacement of the surface ground is important, especially in a soft ground, together with the inertial response due to the inertial forces from superstructures. In this paper it is shown that a response spectrum method in terms of complex modal quantities can be used in the evaluation of the maximum kinematic and inertial seismic responses of the structure-pilesoil system to the ground motion defined at the engineering bedrock surface as an acceleration response spectrum. The notable point is that the kinematic response, the inertial response and the total response can be evaluated by the same analysis model and method by changing the model parameters. Then it is discussed which of the simple sum or the SRSS of the kinematic and inertial responses is appropriate even in resonant cases for the evaluation of the maximum pile-head bending moment. It is concluded through many examples that the validity of the simple sum or the SRSS depends on the relation between the fundamental natural period of the surface ground and that of the superstructure while an averaged evaluation is valid in resonant cases.

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Section: Discussionmentioning

confidence: 99%

Section: Conventional Methods For Estimating Seismic Pile Responsementioning

confidence: 99%

Section: Earth Pressure Effectmentioning

confidence: 99%

Section: Treatment Of Design Response Spectrum At Engineering Bedrockmentioning

confidence: 99%

Section: Earth Pressure Effectmentioning

confidence: 99%

See 3 more Smart Citations

Unified analysis of kinematic and inertial earthquake pile responses via the single-input response spectrum method

Kojima

Fujita

Takewaki

2014

Soil Dynamics and Earthquake Engineering

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Experimental investigation on seismic behavior of scoured bridge pier with pile foundation

Wang

Liu

Chen

et al. 2014

Earthq Engng Struct Dyn

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Summary This study investigated the seismic performance and soil‐structure interaction of a scoured bridge models with pile foundation by shaking table tests using a biaxial laminar shear box. The bridge pier model with pile foundation comprised a lumped mass representing the superstructure, a steel pier, and a footing supported by a single aluminum pile within dry silica sand. End of the pile was fixed at the bottom of the shear box to simulate the scenario that the pile was embedded in a firm stratum of rock. The bridge pier model was subjected to one‐directional shakes, including white noise and earthquake records. The performance of the bridge pier model with pile foundation was discussed for different scoured conditions. It is found that the moment demand of pile increases with the increase of scoured depth whereas the moment demand of the bridge pier decreases, and this transition may induce the bridge failure mechanism transform from pier to pile. The seismic demand on scoured pile foundations may be underestimated and misinterpreted to a certain degree. When evaluating the system damping ratio with SSI, the system response may not be significantly changed even if the soil viscous damping contribution is varied. Copyright © 2014 John Wiley & Sons, Ltd.

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Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Wang

Shang

2019

Earthq Engng Struct Dyn

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Summary This paper presents results of one‐g shake‐table tests on scoured pile‐group‐supported bridge models in saturated (liquefiable) and dry (nonliquefiable) sands. The primary objective is to reveal the influence of liquefaction on seismic demands and failure mechanism of scoured bridges. To this end, two identical models, each consisting of a 2 × 2 reinforced concrete pile‐group with a center‐to‐center spacing of 3 times pile diameter, a cap and a single pier with a lumped iron block, were constructed and embedded into saturated and dry sands, respectively, with the same scour depth of 4 times pile diameter. Typical test results, including excess pore pressure, acceleration and displacement demands are interpreted first, followed by the focus on curvature demands and associated seismic failure mechanism identification. Finally, inertial and kinematic effects on pile curvature demands are estimated using cross‐correlation analyses. Results show that near‐pile liquefied soils exhibit more remarkable dilation tendency as compared to far field. For bridges under the given scour depth, soil liquefaction tends to significantly affect the failure modes via transferring damage positions from pier bottom to pile head and meanwhile from underground pile to pile head. In addition, pile group effects appear to be significant in nonliquefiable soils while to be relatively inessential in liquefied soils. Moreover, the inertial effect is more prominent in nonliquefiable soils, while the kinematic effect itself generally appears to be more significant in liquefiable soils. The test results can be used to validate numerical models for future studies.

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Effects of inertial and kinematic interaction on seismic behavior of pile with embedded foundation

Cited by 154 publications

References 6 publications

Unified analysis of kinematic and inertial earthquake pile responses via the single-input response spectrum method

Unified analysis of kinematic and inertial earthquake pile responses via the single-input response spectrum method

Experimental investigation on seismic behavior of scoured bridge pier with pile foundation

Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

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