Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

This paper reviews the effects of the Lorna Prieta earthquake on Treasure Island and discusses previous studies of site ground motion amplification. An independent study was performed in which it is shown that the site amplification is attributable to the presence of the Bay Mud deposits, a high plasticity silty clay that exhibits higher than normal shear modulus with cyclic strain. There is a similarity with the Mexico City clay deposits in both high plasticity and site amplification. Engineers should be alert to high plasticity clay deposits as a potential source of ground motion amplification.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Effects on High Plasticity Clay Deposits On Site Ground Amplification

St. Louis, Missouri

This paper reviews the effects of the Lorna Prieta earthquake on Treasure Island and discusses previous studies of site ground motion amplification. An independent study was performed in which it is shown that the site amplification is attributable to the presence of the Bay Mud deposits, a high plasticity silty clay that exhibits higher than normal shear modulus with cyclic strain. There is a similarity with the Mexico City clay deposits in both high plasticity and site amplification. Engineers should be alert to high plasticity clay deposits as a potential source of ground motion amplification.