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Soil‐structure interaction with Rayleigh waves
Author(s) -
GómezMassó Alberto,
Lysmer John,
Chen JianChu,
Seed H. Bolton
Publication year - 1983
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.4290110409
Subject(s) - rayleigh wave , superposition principle , acceleration , geology , seismic wave , horizontal plane , free field , soil structure interaction , viscoelasticity , gravity wave , seismology , geotechnical engineering , wave propagation , physics , structural engineering , optics , geodesy , acoustics , finite element method , classical mechanics , engineering , quantum mechanics , thermodynamics
Presented is a plane‐strain method for soil‐structure interaction analysis consisting of the superposition of the free field motions and the interaction motions in a generalized seismic environment. The free field is modelled as a horizontally layered viscoelastic medium and the seismic environment may consist of a combination of S, P and Rayleigh waves. The soil‐structure system is modelled with viscoelastic finite elements, transmitting boundaries, viscous boundaries and a three‐dimensional simulation. Comparative analyses of the same structure are conducted for an input of R waves and for vertically propagating S and P waves in a rock site and sand site. In the rock site the R waves produce higher peak horizontal spectral acceleration up to 25 per cent, and a significant rocking effect at points away from the centre of gravity of the structure. However, the S and P waves show higher peak vertical spectral acceleration by up to 15 per cent at the centre of the structure. Very similar horizontal response, but higher vertical response only at the centre of the structure for S and P waves, is obtained for the sand site.