Study on low‐strain integrity testing of pipe‐pile using the elastodynamic finite integration technique

Lu, Zhi Tang; Wang, Zhi Liang; Liu, Dong Jia

doi:10.1002/nag.2122

Cited by 33 publications

(19 citation statements)

References 14 publications

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“…In a different approach, Lu et al . addressed the three‐dimensional characteristic of wave propagation in pipe pile by the elastodynamic finite integration technique. The method presented by Lu et al .…”

Section: Introductionmentioning

confidence: 99%

“…The method presented by Lu et al . proved to be an efficient technique for the low‐strain integrity testing of pipe pile. However, Lu's approach did not take the soil plug effect into consideration, which may give rise to reflective signals at the top surface of the soil plug.…”

Section: Introductionmentioning

confidence: 99%

“…In these previous studies, it should be noted that the influence of the weld on the dynamic response of the pipe pile has largely been ignored. In a different approach, Lu et al [33] addressed the three-dimensional characteristic of wave propagation in pipe pile by the elastodynamic finite integration technique. The method presented by Lu et al [33] proved to be an efficient technique for the low-strain integrity testing of pipe pile.…”

Section: Introductionmentioning

confidence: 99%

“…In a different approach, Lu et al [33] addressed the three-dimensional characteristic of wave propagation in pipe pile by the elastodynamic finite integration technique. The method presented by Lu et al [33] proved to be an efficient technique for the low-strain integrity testing of pipe pile. However, Lu's approach did not take the soil plug effect into consideration, which may give rise to reflective signals at the top surface of the soil plug.…”

Section: Introductionmentioning

confidence: 99%

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A new analytical model to study the influence of weld on the vertical dynamic response of prestressed pipe pile

Jiang

Huang

et al. 2017

Num Anal Meth Geomechanics

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Summary This investigation is concerned with the mathematical analysis of a viscoelastic prestressed pipe pile embedded in multilayered soil under vertical dynamic excitation. The pile surrounding soil is governed by the plane strain model, and the soil plug is assumed to be an additional mass connected to the pipe pile shaft by applying the distributed Voigt model. Meanwhile, the prestressed pipe pile is assumed to be a vertical, viscoelastic, and hollow cylinder governed by the one‐dimensional wave equation. Then, analytical solutions of the dynamic response of the pipe pile in the frequency domain are derived by means of the Laplace transform and impedance function transfer method. Subsequently, the corresponding quasi‐analytical solution in the time domain for the case of the prestressed pipe pile undergoing a vertical semi‐sinusoidal exciting force applied at the pile top is obtained by employing the inverse Fourier transform. Utilizing these solutions, selected results for the velocity admittance curve and the reflected wave curve are presented for different heights of the soil plug to examine the influence of weld properties on the vertical dynamic response of prestressed pipe pile. The reasonableness of the theoretical model is verified by comparing the calculated results based on the presented solutions with measured results. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new analytical model to study the influence of weld on the vertical dynamic response of prestressed pipe pile

Jiang

Huang

et al. 2017

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

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“…The low-strain dynamic test, also known as the pulse echo method (PEM), is a method that is usually used to check the integrity of the pile. The PEM is widely used [2][3][4] and recommended by many codes [5][6][7][8]. The transient response method (TRM), also known as the mechanical mobility method, is a method similar to the PEM and was proposed in the 1960s∼1970s [9].…”

Section: Introductionmentioning

confidence: 99%

Bearing Capacity Estimation of Bridge Piles Using the Impulse Transient Response Method

Liu

Zhuang

et al. 2016

Shock and Vibration

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A bearing capacity estimation method for bridge piles was developed. In this method, the pulse echo test was used to select the intact piles; the dynamic stiffness was obtained by the impulse transient response test. A total of 680 bridge piles were tested, and their capacities were estimated. Finally, core drilling analysis was used to check the reliability of this method. The results show that, for intact piles, an obvious positive correlation exits between the dynamic stiffness and bearing capacity of the piles. The core drilling analysis proved that the estimation method was reliable.

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Vertical frequency‐domain compliance of an elastic pipe pile embedded in a liquid‐filled and porous‐viscoelastic soil

Zhang

Zhan

Deng

2022

Num Anal Meth Geomechanics

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The analytical dynamic compliance of an elastic pipe pile fully buried in a fluidfilled and porous-viscoelastic soil stratum resting on rigid bedrock and subjected to a vertical time-harmonic load is proposed. In this study, the Hamilton's principle of dynamics is employed to establish the governing equations for the pipe pile, which is treated as a two-dimensional (2D) hollow bar structure. The outer and inner soil media surrounding the pipe pile are considered as three-dimensional (3D), homogenous, and liquid-saturated porous continuum, besides they are described by the porous-elastic media model proposed by de Boer. The governing equations for the pipe pile and the soils are solved with the aid of the separation technique of variables, and also utilizing the boundary and contact conditions of the pipe pile and the soils. Then, the analytical solution for the vertical dynamic compliance of the pipe pile is derived. By comparing with the existing solutions and finite element model (FEM), the results from the newly proposed method confirm its validation. Comparative analyses of numerical examples are finally conducted to reveal the variations and response principle of the dynamic compliance of the pipe pile under different material/geometry parameters.

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Study on low‐strain integrity testing of pipe‐pile using the elastodynamic finite integration technique

Cited by 33 publications

References 14 publications

A new analytical model to study the influence of weld on the vertical dynamic response of prestressed pipe pile

A new analytical model to study the influence of weld on the vertical dynamic response of prestressed pipe pile

Bearing Capacity Estimation of Bridge Piles Using the Impulse Transient Response Method

Vertical frequency‐domain compliance of an elastic pipe pile embedded in a liquid‐filled and porous‐viscoelastic soil

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