Coupled vibration of an interaction system including saturated soils, pile group and superstructure under the vertical motion of bedrocks

A simplified analytical model is developed for the couple vibration of an interaction system including saturated soils, pile group, and superstructure under vertical time-harmonic motion of bedrock, based on Boer's poroelastic theory. The corresponding analytical solutions for the dynamic imped...

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Bibliographic Details
Published in:Soil dynamics and earthquake engineering (1984) 2019-08, Vol.123, p.425-434
Main Authors: Zhang, Shiping, Cui, Chunyi, Yang, Gang
Format: Article
Language:English
Subjects:
Amplification
Bedrock
Bedrock motion
Boer's poroelastic model
Exact solutions
Harmonic motion
Mathematical models
Pile group
Pile groups
Potential functions
Rods
Saturated soil
Saturated soils
Separation technique of variables
Soil analysis
Soil dynamics
Soil investigations
Superstructure
Superstructures
Vertical motion
Vibration
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Summary:A simplified analytical model is developed for the couple vibration of an interaction system including saturated soils, pile group, and superstructure under vertical time-harmonic motion of bedrock, based on Boer's poroelastic theory. The corresponding analytical solutions for the dynamic impedance and amplification factors are further obtained by employing potential function and separation technique of variables which are verified by comparing with existing solutions. In the analytical model, the soil is considered as a fluid-filled poroelastic medium, while the pile and the superstructure are simplified as Rayleigh-Love rods. In addition, a parametric study is performed to investigate the effects of pile-soil parameters on the dynamic amplification factors of the interaction system. •A simplified analytical model is developed for the vertical vibration of an interaction system including saturated soils, pile group, and superstructure.•The corresponding analytical solutions for the dynamic impedance and amplification factors are further obtained.
ISSN:0267-7261
1879-341X
DOI:10.1016/j.soildyn.2019.03.033