| Title | Enhanced Analysis of Falling Weight Deflectometer Data for Use With Mechanistic-Empirical Flexible Pavement Design and Analysis and Recommendations for Improvements to Falling Weight Deflectometers |
|---|---|
| Record ID | 61413 |
| Personal Name Creator |
Chatti, Karim; Kutay, M. Emin; Lajnef, Nizar; Zaabar, Imen; Varma, Sudhir; Lee, Hyung Suk |
| Corporate Creator | Michigan State University |
| Corporate Contributor |
United States. Federal Highway Administration. Office of Acquisition Management |
| Publisher | Turner-Fairbank Highway Research Center; United States. Federal Highway Administration. Office of Research, Development, and Technology |
| Publication Date | 20170301 |
| Language | English |
| Abstract | This report describes the efforts undertaken to review the status of falling weight deflectometer (FWD) equipment, data collection, analysis, and interpretation, including dynamic backcalculation, as they relate to the models and procedures incorporated in the Mechanistic-Empirical Pavement Design Guide. The work conducted in this project resulted in the following: (1) Development of a backcalculation scheme (BACKLAVA) in the time domain using a quasi-static model (LAVA) as its forward solution and genetic algorithm (GA) as its search engine. BACKLAVA is a backcalculation algorithm for a constant asphalt concrete (AC) layer temperature. (2) Development of a backcalculation scheme (BACKLAVAP) in the time domain using a quasi-static model (LAVAP) as its forward solution and GA as its search engine. BACKLAVAP is a backcalculation algorithm for a temperature profile in an AC layer. (3) Development of a backcalculation scheme (BACKLAVAN) in the time domain using a quasi-static model (LAVAN) as its forward solution and GA as its search engine. BACKLAVAN is a backcalculation algorithm for a viscoelastic AC layer and a nonlinear base layer. (4) Development of a backcalculation scheme (DYNABACK-VE) in the time domain using a time-domain viscoelastic dynamic model (ViscoWave-II) as its forward solution and a hybrid approach (GA and Levenberg-Marquardt algorithm) as its search engine. DYNABACK-VE is a backcalculation algorithm for a viscoelastic AC layer with temperature profile and linear unbound layers. (5) Short list of recommendations for FWD equipment enhancements. The tools developed in this project are standalone applications that could be used on most computers. |
| Rosap ID | dot:35823 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/35823 |
| TRT Terms | Algorithms; Analysis; Backcalculation; Data analysis; Data collection; Falling weight deflectometers; Flexible pavements; Mechanistic-empirical pavement design; Recommendations; Time domain analysis; Viscoelastic materials |
| General Subjects | Data and Information Technology; Design; Highways; Pavements; Mechanistic-Empirical Pavement Design Guide; Pavement management; Falling weight deflectometer; Time domain analysis; Viscoelastic analysis; Forward solution |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
1633392 |
| Contract Number | DTFH61-11-C-00026 |
| Report Number | FHWA-HRT-15-063 |
| Availability | Federal Highway Administration |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/61000/61400/61413/15063_2.pdf |
| Format | |
| Database | NTL Digital Repository |