Based on the sensitivity plots obtained from the MEPDG runs, the design input parameters were categorized as being most sensitive, moderately sensitive, or least sensitive in terms of their relative effect on distresses. Representative JPCP and CRCP sections in Iowa were selected for analysis.
MECHANISTIC EMPIRICAL PAVEMENT DESIGN SOFTWARE SOFTWARE
In this comprehensive study, the effect of MEPDG input parameters on the rigid pavement performance is evaluated using the different versions of the MEPDG software (0.7, 0.9, and 1.0) available to date.
This paper focuses on the sensitivity study of jointed plain concrete pavements (JPCP) and continuously reinforced concrete pavements (CRCP) in Iowa using the MEPDG software. Different solutions to mitigate the problems including design for frost heave, pavement insulation and other mitigation strategies will also be described.Initiatives are underway to implement the new mechanistic-empirical pavement design guide (MEPDG) in Iowa. This part of the course will describe the context leading to cold regions problems, identify the main factors involved and describe the effects on pavement performance. The problems related to freeze-thaw cycles are more severe in areas where subgrades are composed of fine-grained, saturated materials. The main factors causing road deterioration are thermal contraction of asphalt bound layers causing thermal cracking and freeze-thaw cycles causing differential frost heave in the winter and bearing capacity loss in the spring. In cold climates, environmental factors are responsible for an important portion of pavement deterioration up to 50% of the deterioration on high-volume roads and as much as 80% on low-volume roads. Many parts of Canada, if not all, have unique cold-weather challenges that pavement practitioners must understand to achieve the desired performance for asphalt pavements. Guy Doré is a renowned researcher in the field of cold weather paving and will share his unique perspective on specific challenges of paving and pavement performance in harsh climates. The objective of the course will not be to do pavement design per se, but to understand the inputs required depending on the design level, the types of pavement and rehabilitation possible, the determination of performance by the software and the available resources to progress. The course will also present the current state of implementation the software in North America, as well as the continuing improvement process for the software and the role of different stakeholder groups. Finally, the local calibration of the software will be discussed. As well, the design and rehabilitation of asphalt mix pavements with the software will be explained, including an analysis of the pavement response, distress and smoothness models. The required climate, traffic and materials inputs will be detailed according to the different levels of analysis available. The background and an overview of the software will be reviewed. It will mainly focus on the characteristics and the performance of asphalt mixes. This part of the course will be about the mechanistic–empirical design of asphalt mix pavements with the AASHTOWare Pavement ME Design software. Félix, as one of two Canadians that participates in the AASHTO task group for Pavement ME development, is in a unique position to share his knowledge on mechanistic design with participants. The course will be available in English & French.įélix Doucet will provide an overview of mechanistic-empirical Pavement Design with AASHTOWare’s Pavement ME design software. This two-part course will cover two distinct topic areas presented by Félix Doucet (Ministères des Transports du Québec) and Guy Doré (Université Laval).
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