Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

The beneficial or detrimental effect of dynamic Soil-Structure Interaction (SSI) is a controversial issue. With reference to an idealized R/C shear building, a comprehensive comparison between the results obtained with a classical fixed-base analysis and a complete SSI analysis is provided in the present paper. The shear-type structure is modeled as generalized Single Degree Of Freedom (SDOF) system using the principle of virtual displacements. The foundation consists of surface square foundations resting on different soil conditions, consistent with the provisions of EC8-part I. SSI effects in the far-field of earthquakes was evaluated by direct application of the elastic pseudo-acceleration/displacement design spectra proposed in EC8, taking into account the change in natural period and damping of the soil-structure system. SSI effect in near-field area of earthquakes was analyzed using the computer program SASSI2000 (Lysmer et al., 1999), by means of a set of ten actual earthquakes recorded within a distance of 20 km from fault The proposed analyses can be easily used by consultants who want to face the task of SSI in an immediate and simplified manner, without devoting resources into complex analysis. The charts proposed in this paper could be incorporated in seismic guidelines.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Influence of Soil-Structure Interaction on Seismic Response of Shear Buildings

San Diego, California

The beneficial or detrimental effect of dynamic Soil-Structure Interaction (SSI) is a controversial issue. With reference to an idealized R/C shear building, a comprehensive comparison between the results obtained with a classical fixed-base analysis and a complete SSI analysis is provided in the present paper. The shear-type structure is modeled as generalized Single Degree Of Freedom (SDOF) system using the principle of virtual displacements. The foundation consists of surface square foundations resting on different soil conditions, consistent with the provisions of EC8-part I. SSI effects in the far-field of earthquakes was evaluated by direct application of the elastic pseudo-acceleration/displacement design spectra proposed in EC8, taking into account the change in natural period and damping of the soil-structure system. SSI effect in near-field area of earthquakes was analyzed using the computer program SASSI2000 (Lysmer et al., 1999), by means of a set of ten actual earthquakes recorded within a distance of 20 km from fault The proposed analyses can be easily used by consultants who want to face the task of SSI in an immediate and simplified manner, without devoting resources into complex analysis. The charts proposed in this paper could be incorporated in seismic guidelines.