Location

St. Louis, Missouri

Session Start Date

3-11-1991

Session End Date

3-15-1991

Abstract

By actual measuring and theory analysis, this paper obtains the saturated water mass density and shear modulus of saturated soil , and also the major factor affecting near source attenuation by the mteration of soil skeleton and water , the later also being the major factor affecting far source attenuation. The paper inquiries into the affect of the depth of underground water on the wave propagation. For rock base, as the wave velocity of rock body wave is high and the body wave attenuation much faster than the surface wave does, so the near source attenuated generally faster than the soil surface does. The elastic property of rock is better than the soil, although its self-excited vibration frequency is high; the damping of the material is small. So the far source attenuated much slower than soil does. The paper also inquiries into the effect of the covering layer of rock surface, the tread of rock structure, and the ditch on the attenuation of vibration wave. The geometry attenuation factor and soil attenuation factor in the formula of attenuation calculation are also recommended in the paper.

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

Attenuation of Ground Vibration on Saturated Silt Clay and Rock Bases

St. Louis, Missouri

By actual measuring and theory analysis, this paper obtains the saturated water mass density and shear modulus of saturated soil , and also the major factor affecting near source attenuation by the mteration of soil skeleton and water , the later also being the major factor affecting far source attenuation. The paper inquiries into the affect of the depth of underground water on the wave propagation. For rock base, as the wave velocity of rock body wave is high and the body wave attenuation much faster than the surface wave does, so the near source attenuated generally faster than the soil surface does. The elastic property of rock is better than the soil, although its self-excited vibration frequency is high; the damping of the material is small. So the far source attenuated much slower than soil does. The paper also inquiries into the effect of the covering layer of rock surface, the tread of rock structure, and the ditch on the attenuation of vibration wave. The geometry attenuation factor and soil attenuation factor in the formula of attenuation calculation are also recommended in the paper.