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Non‐linear soil response in ground motions
Author(s) -
Wen KuoLiang
Publication year - 1994
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.4290230603
Subject(s) - isotropy , anisotropy , geology , geotechnical engineering , acceleration , peak ground acceleration , seismology , structural basin , geophysics , ground motion , geomorphology , physics , optics , classical mechanics
From both theoretical and empirical studies, we know that a soft soil layer will amplify seismic waves of certain frequencies and cause damage to structures, depending on the physical properties and the thickness of the layer. Most developed cities are situated on a plane or a basin with soft geological strata. Thus, understanding the characteristics of soft soil response to seismic loading is important. Seismologists and engineers are interested in questions of linear versus non‐linear soil response and isotropy versus anisotropy as a soil property. The records of the downhole accelerographs of an array in Lotung provide an opportunity to study these problems. The results show that the soil response in Lotung does not have an anisotropy effect, and significant non‐linear soil response occurred during the strong ground motions in which peak ground acceleration values at ground surface are larger than 150 gal.