The pavement engineering industry called for a more robust, mechanistic-based pavement design procedure that allowed designers to analyze the impacts of project-specific subgrade, climate, materials, and traffic and determine future performance in terms of pavement distress accumulation and ride quality deterioration. Mechanistic Empirical Design Guide Implementation FHWA considers implementation of mechanistic-empirical pavement design a critical element in improving the National Highway System. To help move the implementation forward, FHWA intends to provide significant support for these efforts. This paper presents the results of the calibration and implementation of the Mechanistic-Empirical Pavement Design Guide (MEPDG) for the design of flexible. Abstract The implementation of the Empirical-Mechanistic Pavement Design Guide (MEPDG) method for flexible and rigid pavements requires numerous input parameters. Most of these parameters can be easily determined while some require best estimates that are usually extracted from available literature. This thesis identifies the most critical input parameters in terms of their effects on the damage of pavements and their influence on the determination of the number of corrective maintenance cycles to be performed during the design life of pavements. It was found that for flexible pavement, change in the average monthly temperature by as little as results in large differences in the number of corrective maintenance cycles. Also, consistently with simple mechanics concepts, pavements on stiffer foundations performed better under the load and hence, required fewer number of the corrective maintenance cycles than those founded on more flexible soils. Also, variations in truck weights affected the outcome in terms of the estimated number of corrective maintenance cycles for flexible pavement. Hence, better estimates of the number of corrective maintenance cycles can be obtained when the analysis was based on larger numbers of truck samples. ![]() On the contrary, no significant difference in the final estimation of the number of corrective maintenance cycles was found for rigid pavements even when the average monthly temperatures were increased or decreased by as much as. Moreover, no major difference was observed when a larger sample of trucks was used as input for the analysis. Similarly, change in ambient temperature which is directly related to the differential temperature on the top and the bottom of the slab that may lead to the curling of the slab and faulting, was found not to be critical. Similar to the results obtained for flexible pavements, rigid pavement with stiffer foundation properties performed better in terms of the number of corrective maintenance cycles as they required fewer corrective maintenance cycles. This, in addition to extensive research, allows Clymer to achieve an un-matched level of detail, accuracy & clarity. Clymer Superbike Service, Repair & Maintenance Manual Every Clymer contains hundreds of original photographs and illustrations developed from a complete disassembly and assembly of the motorcycle. FREE Economy Shipping & Handling in USA For Orders Over $200! The step-by-step instructions and two column text with large print are user friendly, bold figure numbers make it easy to quickly match instructions with illustrations and photos. 2013 harley davidson touring service manual pdf.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |