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Soil Structure Interaction in Different Seismic Environments
The current strong interest in nuclear power and the concerns regarding the seismic safety of the facilities involved has generated the development of improved methods of seismic soil-structure interaction analysis. 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 modeled 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 modeled with viscoelastic finite elements, transmitting boundaries viscous boundaries, and a 3-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% and a significant rocking effect at points away from the center of gravity of the structure. However, the S and P waves show a higher peak vertical spectral acceleration by up to 15% at the center of the structure. Very similar horizontal response, but higher vertical response only at the center of the structure for S and P waves, are obtained for the sand site.
Soil Structure Interaction in Different Seismic Environments
The current strong interest in nuclear power and the concerns regarding the seismic safety of the facilities involved has generated the development of improved methods of seismic soil-structure interaction analysis. 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 modeled 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 modeled with viscoelastic finite elements, transmitting boundaries viscous boundaries, and a 3-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% and a significant rocking effect at points away from the center of gravity of the structure. However, the S and P waves show a higher peak vertical spectral acceleration by up to 15% at the center of the structure. Very similar horizontal response, but higher vertical response only at the center of the structure for S and P waves, are obtained for the sand site.
Soil Structure Interaction in Different Seismic Environments
A. Gomez-Masso (author) / J. Lysmer (author) / J. C. Chen (author) / H. B. Seed (author)
1979
57 pages
Report
No indication
English
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