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Dynamic properties of natural soils.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Dynamic properties of natural soils./
Author:	Hwang, Seon Keun.
Description:	1 online resource (395 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 58-07, Section: B, page: 3907.
Contained By:	Dissertation Abstracts International58-07B.
Subject:	Geotechnology. -
Online resource:	click for full text (PQDT)
ISBN:	9780591529487

Dynamic properties of natural soils.
Hwang, Seon Keun.

Dynamic properties of natural soils. - 1 online resource (395 pages)

Source: Dissertation Abstracts International, Volume: 58-07, Section: B, page: 3907.

Thesis (Ph.D.)--The University of Texas at Austin, 1997.

Includes bibliographical references

Dynamic properties of undisturbed soils (shear modulus, G, and material damping ratio, D) are essential parameters in the design of soil-structure systems subjected to dynamic loadings. Measurement of these properties in the laboratory often requires significant effort and expense. Two laboratory methods for this purpose are the resonant column (RC) and torsional shear (TS) tests. The main objective of this study is the laboratory investigation of the dynamic properties of undisturbed soil specimens expressed in terms of G and D. For this purpose, Forty-five natural specimens were tested. Their physical properties were determined, and their dynamic properties were studied using combined RC and TS tests. In addition to measuring dynamic soil properties, the compliance associated with the TS and RC equipment was identified and quantified. This compliance, which manifested itself mainly in equipment-generated damping, was properly taken into account in the dynamic measurements to obtain accurate soil properties.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780591529487Subjects--Topical Terms:

1179676
Geotechnology.
Index Terms--Genre/Form:

554714
Electronic books.

Dynamic properties of natural soils.
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100 1 $a Hwang, Seon Keun. $3 1190399
245 1 0 $a Dynamic properties of natural soils.
264 0 $c 1997
300 $a 1 online resource (395 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 58-07, Section: B, page: 3907.
500 $a Supervisor: Kenneth H. Stokoe II.
502 $a Thesis (Ph.D.)--The University of Texas at Austin, 1997.
504 $a Includes bibliographical references
520 $a Dynamic properties of undisturbed soils (shear modulus, G, and material damping ratio, D) are essential parameters in the design of soil-structure systems subjected to dynamic loadings. Measurement of these properties in the laboratory often requires significant effort and expense. Two laboratory methods for this purpose are the resonant column (RC) and torsional shear (TS) tests. The main objective of this study is the laboratory investigation of the dynamic properties of undisturbed soil specimens expressed in terms of G and D. For this purpose, Forty-five natural specimens were tested. Their physical properties were determined, and their dynamic properties were studied using combined RC and TS tests. In addition to measuring dynamic soil properties, the compliance associated with the TS and RC equipment was identified and quantified. This compliance, which manifested itself mainly in equipment-generated damping, was properly taken into account in the dynamic measurements to obtain accurate soil properties.
520 $a An empirical equation for predicting G$\rm\sb{max}$ was developed. Correlations between coefficients used in this equation and physical properties were found using linear regression analysis. Predicted G$\rm\sb{max}$ values with the proposed equation agreed well with test results. The excitation frequency was found to have only a small effect on G$\rm\sb{max}.$.
520 $a An empirical equation for predicting D$\rm\sb{min}$ was also found. Correlations between the coefficients used in this equation and physical properties were investigated. The excitation frequency was found to have a significant effect on D$\rm\sb{min}.$ It was found that plasticity index and void ratio are also important variables affecting D$\rm\sb{min}.$.
520 $a Nonlinear characteristics of G and D were investigated. A new empirical equation for reference strain, $\rm\gamma\sb{r},$ was developed. Coefficients used in this equation were obtained by multiple linear regression analysis. The shear modulus reduction curve was well predicted with $\rm\gamma\sb{r}.$ Also, nonlinear D of soils was well represented by an inverse linear function of log G/G$\rm\sb{max}.$ It is concluded that, for natural soils, values of G and D over a wide range in shearing strains ($$0.2%) can be predicted quite well using several physical characteristics with the empirical equations developed in this study.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Geotechnology. $3 1179676
650 4 $a Civil engineering. $3 561339
655 7 $a Electronic books. $2 local $3 554714
690 $a 0428
690 $a 0543
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a The University of Texas at Austin. $3 1182055
773 0 $t Dissertation Abstracts International $g 58-07B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9802908 $z click for full text (PQDT)