Location

St. Louis, Missouri

Session Start Date

3-11-1991

Session End Date

3-15-1991

Abstract

The cellular mode concept uses simple physical reasoning to treat the response of soft sediments to earthquake shaking. It assumes that discrete areas of the ground, or "cells", have normal modes of vibration, and that each cell has its own natural frequency of vibration. Evidence indicates that shaking effects often relate directly to cell properties. Thus the 1967 Caracas, 1976 Tangshan, 1985 Mexico and 1989 San Francisco earthquakes have damage patterns, liquefaction patterns and instrumental record features which reflect the response of cellular modes. Since the introduction of the concept in 1974 a range of analytical and numerical techniques have been devised to characterize the cells and their response to earthquake shaking.

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

Cellular Normal Modes: An Explanation for Alluvium Response to Earthquakes

St. Louis, Missouri

The cellular mode concept uses simple physical reasoning to treat the response of soft sediments to earthquake shaking. It assumes that discrete areas of the ground, or "cells", have normal modes of vibration, and that each cell has its own natural frequency of vibration. Evidence indicates that shaking effects often relate directly to cell properties. Thus the 1967 Caracas, 1976 Tangshan, 1985 Mexico and 1989 San Francisco earthquakes have damage patterns, liquefaction patterns and instrumental record features which reflect the response of cellular modes. Since the introduction of the concept in 1974 a range of analytical and numerical techniques have been devised to characterize the cells and their response to earthquake shaking.