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Seismic behaviour of pile groups by hybrid experiments
Author(s) -
Toki Kenzo,
Sato Tadanobu,
Kiyono Junji,
Garmroudi Nozar Kishi,
Emi Susumu,
Yoshikawa Masaaki
Publication year - 1991
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290201002
Subject(s) - pile , nonlinear system , frequency domain , foundation (evidence) , vibration , scaling , structural engineering , amplitude , time domain , earthquake engineering , geotechnical engineering , engineering , geology , mathematics , computer science , physics , acoustics , mathematical analysis , geometry , archaeology , quantum mechanics , computer vision , history
Non‐linear seismic soil‐pile interaction was studied with a hybrid procedure that used a pseudo‐dynamic testing (PDT) method modified to account for frequency dependence and developed for foundation‐soil systems. The numerical scheme used in the conventional PDT was improved by the introduction of a time‐dependent pseudo‐forcing function derived from the frequency‐dependent dynamic characteristics of the system by Hilbert transformation in the frequency domain. Single, 2‐, 3‐ and 9‐pile group foundation models were used, their mechanical characteristics later being determined from static and forced vibration dynamic tests. Amplitude scaling was used for three recorded accelerograms. Data recorded during an earthquake at the site of the experiments revealed that the proposed methodology predicts well seismic nonlinear interaction and accounts for frequency dependence and non‐linearity in the time domain.