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Nonlinear effects on dynamic respons...

Chang, Der-Wen.

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Nonlinear effects on dynamic response of pavements using the nondestructive testing techniques.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Nonlinear effects on dynamic response of pavements using the nondestructive testing techniques./
Author:	Chang, Der-Wen.
Description:	281 p.
Notes:	Source: Dissertation Abstracts International, Volume: 52-04, Section: B, page: 2186.
Contained By:	Dissertation Abstracts International52-04B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9128185

Nonlinear effects on dynamic response of pavements using the nondestructive testing techniques.
Chang, Der-Wen.

Nonlinear effects on dynamic response of pavements using the nondestructive testing techniques. - 281 p.

Source: Dissertation Abstracts International, Volume: 52-04, Section: B, page: 2186.

Thesis (Ph.D.)--The University of Texas at Austin, 1991.

The objective of this work is to assess the significance of nonlinear material behavior for various levels of loads and frequencies on the data measured in non-destructive tests of pavements. An analytical investigation is conducted using two approaches; (1) An equivalent linear analysis where solutions are obtained iteratively adjusting the material properties for each cycle on the basis of the computed strain levels from the previous analysis and a set of nonlinear deformational curves obtained in laboratory tests. The analyses are conducted in the frequency domain and time histories of the surface displacements are obtained using an inverse Fast Fourier Transform. (2) True nonlinear analysis to obtain solutions in the time domain integrating step by step the dynamic equilibrium equations with an appropriate set of constitutive equations for the materials.Subjects--Topical Terms:

1018410
Applied Mechanics.

Nonlinear effects on dynamic response of pavements using the nondestructive testing techniques.
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008 130515s1991 ||||||||||||||||| ||eng d
035 $a (UMI)AAI9128185
035 $a AAI9128185
040 $a UMI $c UMI
100 1 $a Chang, Der-Wen. $3 1685284
245 1 0 $a Nonlinear effects on dynamic response of pavements using the nondestructive testing techniques.
300 $a 281 p.
500 $a Source: Dissertation Abstracts International, Volume: 52-04, Section: B, page: 2186.
500 $a Supervisor: Jose M. Roesset.
502 $a Thesis (Ph.D.)--The University of Texas at Austin, 1991.
520 $a The objective of this work is to assess the significance of nonlinear material behavior for various levels of loads and frequencies on the data measured in non-destructive tests of pavements. An analytical investigation is conducted using two approaches; (1) An equivalent linear analysis where solutions are obtained iteratively adjusting the material properties for each cycle on the basis of the computed strain levels from the previous analysis and a set of nonlinear deformational curves obtained in laboratory tests. The analyses are conducted in the frequency domain and time histories of the surface displacements are obtained using an inverse Fast Fourier Transform. (2) True nonlinear analysis to obtain solutions in the time domain integrating step by step the dynamic equilibrium equations with an appropriate set of constitutive equations for the materials.
520 $a The variation with depth as well as horizontally of the strain and equivalent material properties underneath the road, in particular the Falling Weight Deflectometer test, are computed. An error estimation of the layer moduli that would be obtained using the standard backcalculation procedures is also performed. The results indicate that the material nonlinearities can be important for the FWD test on flexible pavements where the subgrade is relatively soft and/or the pavement is very thin. Such effects, which increase the peak displacements under the load by at least 30%, can be neglected for receivers at distances of 2 feet or more from the source. In general, a FWD test with a load of 1000 lbs or less would not result in any apparent nonlinear effects on the surface deflections at any pavement site. For FWD tests on rigid pavements or flexible pavements with a relatively stiff subgrade, nonlinearities can also be ignored. The result of this study confirms that the Dynaflect test and the SASW method operate within the elastic range using the standard load amplitude(s).
590 $a School code: 0227.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Geotechnology. $3 1018558
650 4 $a Engineering, Civil. $3 783781
690 $a 0346
690 $a 0428
690 $a 0543
710 2 $a The University of Texas at Austin. $3 718984
773 0 $t Dissertation Abstracts International $g 52-04B.
790 1 0 $a Roesset, Jose M., $e advisor
790 $a 0227
791 $a Ph.D.
792 $a 1991
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9128185