Soil-Structure Interaction

Date: June 25 & 26, 2010

Presenters:
Donald Anderson, Ph.D., P.Eng.
Professor Emeritus of Civil Engineering
University of British Columbia, Vancouver, BC

Upul Atukorala, PhD, PEng.
Principal
Golder Associates Ltd., Burnaby, BC

Craig Comartin, S.E.
President
CDComartin Inc., Stockton, California

Ron DeVall, Ph.D., P.Eng
Senior Consultant-Structural Engineering
Read Jones Christoffersen Ltd., Vancouver, BC

Liam Finn, Ph.D.,P.Eng.
Professor Emeritus of Civil Engineering
University of British Columbia, Vancouver, BC

Blair Gohl, PhD., P.Eng
Senior Associate
AMEC Earth and Environmental, Burnaby, BC

Bruce Hamersley, P.Eng.
Principal
Klohn Crippen Berger Ltd., Vancouver, BC

Ernest Naesgaard, P.Eng.
Principal
Naesgaard Geotechnical Ltd., Bowen Island, BC

John Sherstobitoff, P.Eng.
Manager, Structural
Ausenco Sandwell, Vancouver, BC

Anoosh Shamsabadi, Ph.D, P.E.
Senior Bridge Engineer
California Department of Transportation, Sacramento, California

Carlos Ventura, Ph.D., P.E., P.Eng.
Professor of Civil Engineering
University of British Columbia, Vancouver, BC

Adrian Wightman, M.Sc., P.Eng.
Principal Consultant
BGC Engineering Inc., Vancouver, BC

This two-day workshop offered a guided tour through the various ways of accounting for soil-structure interaction (SSI) from analysis of the total soil-structure system to analysis of various approximate models of the system. The focus was on buildings and bridges, with both shallow and deep foundations. The seminar highlighted the benefits of including SSI analysis, from the perspective of improved understanding of actual system behaviour as well as improved efficiencies in structural designs that can be achieved.

When analysis of the total soil-structure system is carried out, the effects of soil-structure interaction (SSI) are implicitly included in the analysis and reflected in the results. However this type of analysis, while feasible, is rarely practical in practice because the structural analysis programs used by structural engineers cannot handle the nonlinear soil continuum directly. Modeling the effects of soil-structure interaction for practical design means developing reliable simple models that include the flexibility of the soil and foundation system; the dissipation of energy from the soil-structure system through radiation and hysteretic soil damping; and the modification of the ground motion transmitted to the structure by soil-structure interaction.

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