Location

St. Louis, Missouri

Session Start Date

3-11-1991

Session End Date

3-15-1991

Abstract

A two dimensional (2D) dynamic wall-soil computational model is proposed. The model accounts for wall and soil resonance, nonlinear wall-backfill soil interaction, simultaneous wall base sliding and rotation, nonlinear soil properties and possible pore pressure buildup. A bending beam with a base yielding rotational spring and a base translational slide element represents the wall. A 2D shear beam represents the soil system. The wall and supporting soil interaction through a Winkler type nonlinear no-tension spring system. An elasto-plast1c path-dependent hysteretic model accounts for nonl1near so1l behavior and possible pore pressure buildup. The seismic response of a 15m high cantilever wall is studied in detail. Wall translational and rotational failure mechanisms are discussed. The computed results indicate the importance of including seismically induced moments in dynamic wall stability evaluation. It is also found that retaining walls with loose saturated backfill soils may accumulate excess1ve permanent displacements well beyond the strong shaking phase of an earthquake.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

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

Meeting Name

Second Conference

Publisher

University of Missouri--Rolla

Publication Date

3-11-1991

Document Version

Final Version

Rights

© 1991 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Mar 11th, 12:00 AM Mar 15th, 12:00 AM

Retaining Walls; Computation of Seismically Induced Deformations

St. Louis, Missouri

A two dimensional (2D) dynamic wall-soil computational model is proposed. The model accounts for wall and soil resonance, nonlinear wall-backfill soil interaction, simultaneous wall base sliding and rotation, nonlinear soil properties and possible pore pressure buildup. A bending beam with a base yielding rotational spring and a base translational slide element represents the wall. A 2D shear beam represents the soil system. The wall and supporting soil interaction through a Winkler type nonlinear no-tension spring system. An elasto-plast1c path-dependent hysteretic model accounts for nonl1near so1l behavior and possible pore pressure buildup. The seismic response of a 15m high cantilever wall is studied in detail. Wall translational and rotational failure mechanisms are discussed. The computed results indicate the importance of including seismically induced moments in dynamic wall stability evaluation. It is also found that retaining walls with loose saturated backfill soils may accumulate excess1ve permanent displacements well beyond the strong shaking phase of an earthquake.