Guidelines for review and evaluation of backcalculation results

Stubstad, R. N.; Jiang, Y. S. ‡q (Yansheng S.), ‡d 1955-; Lukanen, Erland O., ‡d 1944-; Applied Research Associates

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Guidelines for review and evaluation of backcalculation results

2006-02-01
By Stubstad, R. N. ; Jiang, Y. S. ‡q (Yansheng S.), ‡d 1955- ; Lukanen, Erland O., ‡d 1944-

[PDF-266.57 KB]

English

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Creators:

Stubstad, R. N. ; Jiang, Y. S. ‡q (Yansheng S.), ‡d 1955- ; Lukanen, Erland O., ‡d 1944-

Stubstad, R. N. ; Jiang, Y. S. ‡q (Yansheng S.), ‡d 1955- ; Lukanen, Erland O., ‡d 1944- Less -
Corporate Creators:

Applied Research Associates
Corporate Contributors:

United States. Federal Highway Administration. Office of Infrastructure Research and Development
Subject/TRT Terms:

[+]

Backcalculation Deflection Falling Weight Deflectometers Long-Term Pavement Performance Program (U.S.) Materials Tests Modulus Of Elasticity Pavement Performance
Publication/ Report Number:

FHWA-HRT-05-152
Resource Type:

Tech Report
OCLC Number:

213363333
Corporate Publisher:

United States. Federal Highway Administration
NTL Classification:

NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance
Abstract:

This document presets a new approach to determining layered elastic moduli from in situ load-deflection data, which was developed under the Federal Highway Administration's project for reviewing Long-Term Pavement Performance (LTPP) backcalculation data. This approach is called forwardcalculation, and it differs from backcalculation in that modulus estimates are calculated directly from the load and deflection data using closed-form formulae rather than through iteration. The closed-form forwardcalculation equations are used for the subgrade and the bound surface course, respectively, for both flexible and rigid pavement falling weight deflectometer (FWD) data. Intermediate layer moduli are estimated through commonly used modular ratios between adjacent layers. The audience for this document includes highway agency engineers, researchers, and consultants who are involved in pavement analysis, design, construction, and deflection data analysis.
Format:

PDF
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:4d07237a7cc43541426364559db81286729aa96cf1370407ee121bf5dd7f661c
Download URL:

https://rosap.ntl.bts.gov/view/dot/730/dot_730_DS1.pdf
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Guidelines for review and evaluation of backcalculation results

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