Kinematic response of pipe piles subjected to vertically propagating seismic P-waves

Zheng, Changjie; Kouretzis, George; Luan, Lubao; Ding, Xuanming

doi:10.1007/s11440-020-01050-3

Cited by 39 publications

(11 citation statements)

References 29 publications

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“…We have presented an analytical solution for determining the kinematic response of a single open‐ended end‐bearing pipe pile to vertically propagating seismic S‐waves. The formulation can be considered an extension of the solution of Zheng et al 52 . for solid piles, and we have shown that the proposed solution degenerates to that of Ke and Zhang 37 for the special case of a solid pile.…”

Section: Discussionmentioning

confidence: 90%

“…We have presented an analytical solution for determining the kinematic response of a single open-ended end-bearing pipe pile to vertically propagating seismic S-waves. The formulation can be considered an extension of the solution of Zheng et al 52 for solid piles, and we have shown that the proposed solution degenerates to that of Ke and Zhang 37 for the special case of a solid pile. We have employed the solution to study the sensitivity of the seismic response of pipe piles to certain key problem parameters such as pile slenderness, the relative soil-pipe pile stiffness, and the fixity conditions at the pile head.…”

Section: Discussionmentioning

confidence: 92%

“…Nevertheless, steel and prestressed concrete pipe piles are also widely used in engineering practice. [46][47][48][49][50][51] Recently, the authors 52 proposed a rigorous continuum analytical model to describe the kinematic response of pipe piles subjected to seismic P-wave propagation. In this paper we present the extension of that model to account for shear S-waves, that arguably dominate the seismic response of piled foundations.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transverse seismic response of end‐bearing pipe piles to S‐waves

Zheng

Luo

Kouretzis

et al. 2022

Num Anal Meth Geomechanics

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This paper presents a method for the seismic analysis of open-ended pipe piles subjected to vertically propagating S-waves, that considers kinematic interaction between the pipe pile and its external and internal soil. Following the presentation of the elastodynamic continuum model, which is based on the assumptions of linear elastic soil response and uniform soil conditions, we employ the derived solution to investigate the sensitivity of the seismic response of pipe piles to certain key problem parameters, such as pile slenderness or the relative stiffness of the pipe pile compared to its surrounding soil. We demonstrate that the bending stiffness of pipe piles is governing their seismic response, and that thin-walled pipe piles offer the best material usage versus seismic performance ratio. The presented solution offers a low-cost alternative to complex numerical simulations for preliminary seismic design purposes, such as the selection of optimal pipe pile section geometry.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transverse seismic response of end‐bearing pipe piles to S‐waves

Zheng

Luo

Kouretzis

et al. 2022

Num Anal Meth Geomechanics

Self Cite

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show abstract

“…With the development of fictitious soil-pile model, 32,33 the pile end soil experiencing circumferential deformation can be better examined without involving any empirical (semi-analytical) methods 34,35 or just being simulated as fixed boundaries. 36,37 Although the development of the single pile vibration theory has greatly facilitated the LSITs, the testable pile length is still very limited because of the dissipation of elastic waves along the longitudinal direction. Meanwhile, a clear pile head cross-section for the subjection of the longitudinal signal also limits its application in existing pile detections.…”

Section: Introductionmentioning

confidence: 99%

“…presented the torsional impedance functions of a single pipe pile with the additional mass model. With the development of fictitious soil–pile model, 32,33 the pile end soil experiencing circumferential deformation can be better examined without involving any empirical (semi‐analytical) methods 34,35 or just being simulated as fixed boundaries 36,37 …”

Section: Introductionmentioning

confidence: 99%

Analytical solution for distributed torsional low strain integrity test for pipe pile

Zhang

Jiang

et al. 2021

Num Anal Meth Geomechanics

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Low strain integrity tests (LSITs) are the most popular non-destructive methods for pile testing. However, traditional LSITs have encountered unprecedented challenges as the need for long pile and existing pile testing keeps multiplying. Compared to traditional longitudinal excitations, the torsional wave is less influenced by the velocity attenuation effect and can be subjected at the pile shaft for existing piles. Distributed torsional LSIT is proposed in this article with the presentation of the corresponding analytical solutions that exhibiting the velocity responses along the pile shaft. The solution is verified with previous simplified theoretical and rigorous finite element method (FEM) answers. At the end, the application of this method is exhibited through the identification of necking and concrete segregation defects on pipe piles, which shows the advantage of this method on long pile testing.

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Flexible support of a pile embedded in unsaturated soil under Rayleigh waves

Yang

Líu

et al. 2022

Earthq Engng Struct Dyn

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Under the action of Rayleigh waves, pile head is easy to rotate with a concrete pile cap, and pure fixed-head condition is rarely achieved, which is a common phenomenon for it usually occurs on the precast piles with insufficient anchorage. In addition, the propagation characteristics of Rayleigh wave have been changed significantly due to the existence of capillary pressure and the coupling between phases in unsaturated soil, which significantly affects the pile-soil interaction. In order to study the above problems, a coupled vibration model of unsaturated soil-pile system subjected to Rayleigh waves is established on the basis that the pile cap is equivalent to a rigid mass block. Meanwhile, the soil constitution is simplified to linear-elastic and small deformations are assumed to occur during the vibration phase of soil-pile system. Then, the horizontal dynamic response of a homogeneous free-field unsaturated soil caused by propagating Rayleigh waves is obtained by using operator decomposition theory and variable separation method. The dynamic equilibrium equation of a pile is established by using the dynamic Winkler model and the Timoshenko beam theory, and the analytical solutions of the horizontal displacement, rotation angle, bending moment and shear force of pile body are derived according to the boundary conditions of flexible constraint of pile top. Based on the present solutions, the rationality of the proposed model is verified by comparing with the previous research results. Through parametric study, the influence of rotational stiffness and yield bending moment of pile top on the horizontal dynamic characteristics of Rayleigh waves induced pile is investigated in detailed. The analysis results can be utilized for the seismic design of pile foundation under Rayleigh waves.

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Kinematic response of pipe piles subjected to vertically propagating seismic P-waves

Cited by 39 publications

References 29 publications

Transverse seismic response of end‐bearing pipe piles to S‐waves

Transverse seismic response of end‐bearing pipe piles to S‐waves

Analytical solution for distributed torsional low strain integrity test for pipe pile

Flexible support of a pile embedded in unsaturated soil under Rayleigh waves

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