Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 284
Book Description
CRREL Technical Publications, 1950-1975
Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 284
Book Description
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 284
Book Description
CRREL Technical Publications, 1950-1975
Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 273
Book Description
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 273
Book Description
CRREL Technical Publications
Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 178
Book Description
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 178
Book Description
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
Book Description
Monthly Catalogue, United States Public Documents
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1592
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1592
Book Description
DttP
Author:
Publisher:
ISBN:
Category : Documents librarians
Languages : en
Pages : 580
Book Description
Publisher:
ISBN:
Category : Documents librarians
Languages : en
Pages : 580
Book Description
Bibliographic Index
Author:
Publisher:
ISBN:
Category : Bibliographical literature
Languages : en
Pages : 1176
Book Description
Publisher:
ISBN:
Category : Bibliographical literature
Languages : en
Pages : 1176
Book Description
Documents to the People
Author:
Publisher:
ISBN:
Category : Documents librarians
Languages : en
Pages : 288
Book Description
Publisher:
ISBN:
Category : Documents librarians
Languages : en
Pages : 288
Book Description
CRREL Report
Author:
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 588
Book Description
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 588
Book Description
The Response of Frozen Soils to Vibratory Loads
Author: Henry W. Stevens
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 112
Book Description
This study was conducted to provide reliable values of the stiffness and damping properties of frozen soils subjected to vibratory loads and to define the significant factors affecting these parameters. A laboratory test was conducted on prepared specimens of frozen soils wherein a right circular cylinder was subjected to steady-state sinusoidal vibration. The material was considered to be linearly viscoelastic. Analysis of test data based on one-dimensional wave propagation yielded the complex Young's modulus, the complex shear modulus, the phase velocity of wave propagation, the shear velocity, the damping property expressed as the angle representing time lag between stress and strain, an attenuation coefficient, and a complex Poisson's ratio. The frequency of vibration was varied from 500 to 10,000 Hz, and the peak dynamic stress was varied from 0.1 to 5.0 psi. Specimens were remolded or cored in-situ, frozen, and tested at temperatures of 0, +15 and +25 deg F.A few tests were conducted on identical soils nonfrozen. Tests results from a limited number of tests on selected soils indicate that the stiffness of these soils varies with the volume of ice/volume of soil ratio, and that ice is less stiff than saturated frozen soils. Frozen soils have stiffnesses up to 100 times those of identical soil nonfrozen. Depending upon the degree of ice saturation, the stiffness of non-saturated frozen soils varies from that of the saturated soils to nearly that of the nonfrozen soils. Stiffness increases with decreasing temperature but the rate is relatively low. As temperature rises and approaches the freezing point, stiffness abruptly decreases.
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 112
Book Description
This study was conducted to provide reliable values of the stiffness and damping properties of frozen soils subjected to vibratory loads and to define the significant factors affecting these parameters. A laboratory test was conducted on prepared specimens of frozen soils wherein a right circular cylinder was subjected to steady-state sinusoidal vibration. The material was considered to be linearly viscoelastic. Analysis of test data based on one-dimensional wave propagation yielded the complex Young's modulus, the complex shear modulus, the phase velocity of wave propagation, the shear velocity, the damping property expressed as the angle representing time lag between stress and strain, an attenuation coefficient, and a complex Poisson's ratio. The frequency of vibration was varied from 500 to 10,000 Hz, and the peak dynamic stress was varied from 0.1 to 5.0 psi. Specimens were remolded or cored in-situ, frozen, and tested at temperatures of 0, +15 and +25 deg F.A few tests were conducted on identical soils nonfrozen. Tests results from a limited number of tests on selected soils indicate that the stiffness of these soils varies with the volume of ice/volume of soil ratio, and that ice is less stiff than saturated frozen soils. Frozen soils have stiffnesses up to 100 times those of identical soil nonfrozen. Depending upon the degree of ice saturation, the stiffness of non-saturated frozen soils varies from that of the saturated soils to nearly that of the nonfrozen soils. Stiffness increases with decreasing temperature but the rate is relatively low. As temperature rises and approaches the freezing point, stiffness abruptly decreases.