A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Mechanistic Evaluation of Test Data from LTPP Flexible Pavement Test Sections. Volume 1. Final Report
The study reported here was conducted to assess how well some of the existing asphalt pavement mechanistic-empirical distress prediction models performed when used in conjunction with the data being collected as part of the national Long Term Pavement Performance (LTPP) program. As part of the study, appropriate data were obtained from the national Information Management System (NIMS) for the GPS-1 and GPS-2 experiments. The first phase of the data analysis involved using the deflection test data to backcalculate pavement layer moduli values. Using representative values of the layer moduli, structural analyses were performed for up to 140 axle-load configurations for the selected test sections. Then, the Asphalt Institute and the Shell procedures were used to predict fatigue cracking and rutting damage. The computed results were compared with observed values. Based on the results, new forms of the fatigue cracking models have been proposed. Also, a new approach to predicting rutting has been developed. This new procedure would account for rutting in each pavement layer and would consider rate-hardening typically observed in the development of rutting. This study has shown that, even given the many current limitations in the LTPP database, the LTPP data can be used successfully to develop a better insight into pavement behavior and to improve pavement performance.
Mechanistic Evaluation of Test Data from LTPP Flexible Pavement Test Sections. Volume 1. Final Report
The study reported here was conducted to assess how well some of the existing asphalt pavement mechanistic-empirical distress prediction models performed when used in conjunction with the data being collected as part of the national Long Term Pavement Performance (LTPP) program. As part of the study, appropriate data were obtained from the national Information Management System (NIMS) for the GPS-1 and GPS-2 experiments. The first phase of the data analysis involved using the deflection test data to backcalculate pavement layer moduli values. Using representative values of the layer moduli, structural analyses were performed for up to 140 axle-load configurations for the selected test sections. Then, the Asphalt Institute and the Shell procedures were used to predict fatigue cracking and rutting damage. The computed results were compared with observed values. Based on the results, new forms of the fatigue cracking models have been proposed. Also, a new approach to predicting rutting has been developed. This new procedure would account for rutting in each pavement layer and would consider rate-hardening typically observed in the development of rutting. This study has shown that, even given the many current limitations in the LTPP database, the LTPP data can be used successfully to develop a better insight into pavement behavior and to improve pavement performance.
Mechanistic Evaluation of Test Data from LTPP Flexible Pavement Test Sections. Volume 1. Final Report
H. A. Ali (author) / S. D. Tayabji (author)
1998
110 pages
Report
No indication
English
Analysis of LTPP Profile Data for Jointed Concrete Pavement Sections
| British Library Conference Proceedings | 1997