Study of vertical dynamic response of viscoelastic tapered pile embedded in layered foundation

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (8) : 120-127.

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Study of vertical dynamic response of viscoelastic tapered pile embedded in layered foundation

WU Wen-bing1,2, WANG Kui-hua2, DOU Bin1

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Abstract

Considering the lateral inertial effect of tapered pile, the vertical vibration of viscoelastic tapered pile embedded in layered foundation is theoretically investigated. Firstly, the soil-tapered pile system is discretized into finite units by considering variable cross-section of tapered pile and stratification of surrounding soil. Then, by virtue of plane strain model to simulate surrounding soil and Rayleigh-Love rode model to simulate tapered pile, the analytical solution of dynamic response of tapered pile in frequency domain and the corresponding semi-analytical solution of dynamic response of tapered pile in time domain are derived by means of Laplace transform technique and impedance function transform method. Finally, by using parametric study method, the accuracy of discretized units is conducted. The influence of the design parameters and material parameters of tapered pile and the stratification of surrounding soil on the vertical dynamic response of tapered pile are also detailed studied.

Key words

tapered pile / vertical vibration / layered foundation / impedance function / time-domain response / frequency-domain response

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WU Wen-bing;WANG Kui-hua;DOU Bin. Study of vertical dynamic response of viscoelastic tapered pile embedded in layered foundation[J]. Journal of Vibration and Shock, 2013, 32(8): 120-127