Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

Soils and rocks are characterized by their highly nonlinear behaviors. This makes it very difficult to ensure similarity between model and prototype for dynamic model tests of geotechnical structures. In reality, a great number of such tests were carried out qualitatively, and valuable information was missed. Based on fairly long time practice and experience of performing dynamic model tests, we get some new ideas to establish similarity relationships between model and real earth structures. It is noticed that during strongly inelastic shaking, peak crest acceleration of earth and rock-fill dams decreases with increasing base excitation, finally at near failure stage the dynamic amplification tends to the uniformly distributed along the dam height and approaches 1.0, despite the variation of inhomogeneity of the dam materials. Results of centrifuge modeling and field earthquake measurements also support such findings. Keeping these in mind, a rather simple dynamic similarity rule may be derived.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

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

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-26-2001

Document Version

Final Version

Rights

© 2001 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Mar 26th, 12:00 AM Mar 31st, 12:00 AM

Similarity Rule for Dynamic Model Tests of Geotechnical Structures

San Diego, California

Soils and rocks are characterized by their highly nonlinear behaviors. This makes it very difficult to ensure similarity between model and prototype for dynamic model tests of geotechnical structures. In reality, a great number of such tests were carried out qualitatively, and valuable information was missed. Based on fairly long time practice and experience of performing dynamic model tests, we get some new ideas to establish similarity relationships between model and real earth structures. It is noticed that during strongly inelastic shaking, peak crest acceleration of earth and rock-fill dams decreases with increasing base excitation, finally at near failure stage the dynamic amplification tends to the uniformly distributed along the dam height and approaches 1.0, despite the variation of inhomogeneity of the dam materials. Results of centrifuge modeling and field earthquake measurements also support such findings. Keeping these in mind, a rather simple dynamic similarity rule may be derived.