Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/43146
Title: Expanded superposition method for impedance functions of inclined-pile groups
Authors: Saitoh, M.
Padrón, L. A. 
Aznárez, J. J. 
Maeso, O. 
Goit, C. S.
UNESCO Clasification: 251107 Ingeniería de suelos
Keywords: Pile groups
Soil – structure interaction
Pile-to-pile interaction factors
Issue Date: 2016
Publisher: 0363-9061
Journal: International Journal for Numerical and Analytical Methods in Geomechanics 
Abstract: This paper presents a superposition method expanded for computing impedance functions (IFs) of inclined‐pile groups. Closed‐form solutions for obtaining horizontal, vertical, and rocking IFs, estimated by using pile‐to‐pile interaction factors, are proposed. IFs of solitary inclined piles, crossed IFs, and explicit incorporation of compatibility conditions for pile‐head movements are also appropriately taken into consideration. All of these factors should be known in advance and will be computed and shown for the most relevant cases. The accuracy of the proposed closed‐form solutions is verified for 2 × 2 and 3 × 3 square inclined‐pile groups embedded in an isotropic viscoelastic homogeneous half‐space soil medium, with hysteretic damping. The pile‐to‐pile interaction factors are computed by means of a three‐dimensional time‐harmonic boundary elements–finite elements coupling formulation. The results indicate that the IFs obtained from the proposed method are in good agreement with those obtained from the coupling formulation. Furthermore, crossed vertical‐rocking IFs of solitary piles need to be appropriately considered for obtaining rocking IFs when the number of piles is small.
URI: http://hdl.handle.net/10553/43146
ISSN: 0363-9061
DOI: 10.1002/nag.2389
Source: International Journal for Numerical and Analytical Methods in Geomechanics[ISSN 0363-9061],v. 40, p. 185-206
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