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The influence of highly stratified dissipative soil on ground motion
Author(s) -
Xu P.C.,
Mal A. K.
Publication year - 1988
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.4290160610
Subject(s) - dissipative system , ground motion , dissipation , viscoelasticity , stratification (seeds) , strong ground motion , geology , geotechnical engineering , motion (physics) , mechanics , seismology , physics , classical mechanics , seed dormancy , germination , botany , quantum mechanics , dormancy , biology , thermodynamics
The influence of the depth and material properties of a sedimentary deposit on earthquake ground motion is examie through theoretical modelling. The strong stratification of a typical deposit is represented by a number of homogene layers of dissipative viscoelastic material. The motion is assumed to be produced by a line source. The calculations carried out by means of a recently developed theoretical technique. The near surface low velocity layers are found to has a very strong amplification effect on the ground motion at some frequencies. The widely used one dimensional approae for site effect evaluation is shown to be valid for smaller epicentral distances only. The deamplification effect of mate dissipation is shown to be extremely important in most cases.