Computational simulation of three-dimensional dynamic soil-pile group interaction in layered soils using disturbed-zone model

Date
2020-03-01
Authors
Jiang, Zhiyan
Ashlock, Jeramy
Ashlock, Jeramy
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Abstract

Computational continuum models of piles embedded in disturbed zones are developed using the Boundary Element Method (BEM) for application to three-dimensional dynamic soil-pile group interaction in layered soils. The enhanced 3D BEM code BEASSI is validated for handling pile group problems by comparison with reference solutions. A general sub-structuring formulation is developed to calculate theoretical accelerance functions. A 3D disturbed-zone computational model is then extended to handle the dynamic response of a typical 2 × 2 pile group. The performance of the model is illustrated through convergence studies and a case study corresponding to full-scale field tests. The results indicate strong frequency-dependent pile-soil-pile interaction by impedance functions, group efficiency ratios, and pile deformations. The findings from this study provide new insights into dynamic soil-pile group interaction, and the general approach can be used to examine other pile and soil conditions.

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<p>This is a manuscript of an article published as Jiang, Zhiyan, and Jeramy C. Ashlock. "Computational simulation of three-dimensional dynamic soil-pile group interaction in layered soils using disturbed-zone model." <em>Soil Dynamics and Earthquake Engineering</em> 130 (2020): 105928. DOI: <a href="http://dx.doi.org/10.1016/j.soildyn.2019.105928" target="_blank">10.1016/j.soildyn.2019.105928</a>. Posted with permission.</p>
Keywords
soil-structure interaction, dynamics, pile group, vibration, boundary element analysis
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