dc.contributor.author |
Matsui, K
|
|
dc.contributor.author |
Hachiya, Y
|
|
dc.contributor.author |
Maina, JW
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|
dc.contributor.author |
Kikuta, Y
|
|
dc.contributor.author |
Nagae, T
|
|
dc.date.accessioned |
2007-10-16T09:12:02Z |
|
dc.date.available |
2007-10-16T09:12:02Z |
|
dc.date.issued |
2006 |
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dc.identifier.citation |
Matsui, K et al. 2006. Influence of seed layer moduli on finite element method-based modulus backcalculation result. Transportation Research Record, Vol. 1951, pp 122-136 |
en |
dc.identifier.issn |
0361-1981 |
|
dc.identifier.uri |
http://hdl.handle.net/10204/1337
|
|
dc.description |
Copyright: 2006 National Academy of Sciences |
en |
dc.description.abstract |
The determination of pavement layer moduli from falling weight deflec-tometer test data is known as backcalculation analysis. Generally, back-calculation analysis is unstable—greatly influenced by several causes of error. They may be categorized as modeling error in the forward analysis, deflection measurement error, or numerical computation error due to instability in the backcalculation procedure, for example. Because of these problems, the seed values selected for layer moduli greatly influence backcalculation results. To reduce the effects of measurement error, truncated singular-value decomposition is used for regularization. Variable scaling, often used in optimization algorithms, is implemented to improve numerical accuracy. A Ritz vector reduction method is used to solve a large system of dynamic equations in dynamic backcalculation efficiently, and various other means are introduced to decrease computational time. Recent updates of Dynamic Back Analysis for Layer Moduli software, first developed in 1993 and whose solver is based on axi-symmetric finite element method, are presented, as are examples of airfield pavement applications. Results are compared with results from Back Analysis for Layer Moduli static backcalculation software, whose solver was developed using multilayered linear elastic theory. Experience indicates that a dynamic backcalculation is superior to static backcalculation. The results from the two methods are presented and compared. |
en |
dc.language.iso |
en |
en |
dc.publisher |
National Academy of Sciences |
en |
dc.subject |
Backcalculation analysis |
en |
dc.subject |
DBALM |
en |
dc.subject |
Dynamic back analysis for layer moduli |
en |
dc.subject |
APT |
en |
dc.subject |
Accelerated pavement testing |
en |
dc.title |
Influence of seed layer moduli on finite element method-based modulus backcalculation result |
en |
dc.type |
Article |
en |
dc.identifier.apacitation |
Matsui, K., Hachiya, Y., Maina, J., Kikuta, Y., & Nagae, T. (2006). Influence of seed layer moduli on finite element method-based modulus backcalculation result. http://hdl.handle.net/10204/1337 |
en_ZA |
dc.identifier.chicagocitation |
Matsui, K, Y Hachiya, JW Maina, Y Kikuta, and T Nagae "Influence of seed layer moduli on finite element method-based modulus backcalculation result." (2006) http://hdl.handle.net/10204/1337 |
en_ZA |
dc.identifier.vancouvercitation |
Matsui K, Hachiya Y, Maina J, Kikuta Y, Nagae T. Influence of seed layer moduli on finite element method-based modulus backcalculation result. 2006; http://hdl.handle.net/10204/1337. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Matsui, K
AU - Hachiya, Y
AU - Maina, JW
AU - Kikuta, Y
AU - Nagae, T
AB - The determination of pavement layer moduli from falling weight deflec-tometer test data is known as backcalculation analysis. Generally, back-calculation analysis is unstable—greatly influenced by several causes of error. They may be categorized as modeling error in the forward analysis, deflection measurement error, or numerical computation error due to instability in the backcalculation procedure, for example. Because of these problems, the seed values selected for layer moduli greatly influence backcalculation results. To reduce the effects of measurement error, truncated singular-value decomposition is used for regularization. Variable scaling, often used in optimization algorithms, is implemented to improve numerical accuracy. A Ritz vector reduction method is used to solve a large system of dynamic equations in dynamic backcalculation efficiently, and various other means are introduced to decrease computational time. Recent updates of Dynamic Back Analysis for Layer Moduli software, first developed in 1993 and whose solver is based on axi-symmetric finite element method, are presented, as are examples of airfield pavement applications. Results are compared with results from Back Analysis for Layer Moduli static backcalculation software, whose solver was developed using multilayered linear elastic theory. Experience indicates that a dynamic backcalculation is superior to static backcalculation. The results from the two methods are presented and compared.
DA - 2006
DB - ResearchSpace
DP - CSIR
KW - Backcalculation analysis
KW - DBALM
KW - Dynamic back analysis for layer moduli
KW - APT
KW - Accelerated pavement testing
LK - https://researchspace.csir.co.za
PY - 2006
SM - 0361-1981
T1 - Influence of seed layer moduli on finite element method-based modulus backcalculation result
TI - Influence of seed layer moduli on finite element method-based modulus backcalculation result
UR - http://hdl.handle.net/10204/1337
ER -
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en_ZA |