| Title | Guidelines for review and evaluation of backcalculation results |
|---|---|
| Record ID | 30554 |
| Personal Name Creator |
Stubstad, R. N.; Jiang, Y. S. ‡q (Yansheng S.), ‡d 1955-; Lukanen, Erland O., ‡d 1944- |
| Source | v, 19 p. |
| Corporate Creator | Applied Research Associates |
| Corporate Contributor |
United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development |
| Publisher | United States. Federal Highway Administration |
| Publication Date | 20060200 |
| Language | English |
| 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. |
| Rosap ID | dot:730 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/730 |
| TRT Terms | Pavement performance; Materials tests; Backcalculation; Modulus of elasticity; Deflection; Falling weight deflectometers |
| General Subjects | Long-Term Pavement Performance Program (U.S.) |
| Classification | NTL - HIGHWAY/ROAD TRANSPORTATION - Pavement Management and Performance |
| Geographical Coverage |
United States |
| OCLC | 213363333 |
| TRIS Online Accession No |
1025733 |
| Report Number | FHWA-HRT-05-152 |
| Availability | Federal Highway Administration |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/30000/30500/30554/05152.pdf |
| Alternative URL | http://www.fhwa.dot.gov/pavement/ltpp/pubs/05152/05152.pdf; http://www.fhwa.dot.gov/pavement/ltpp/pubs/05152/ |
| Format | |
| Database | NTL Digital Repository |