TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Sensitivity Study of Iowa Flexible Pavements Using Mechanistic-Empirical Pavement Design Guide

Accession Number:

01026227

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

In the newly released Mechanistic-Empirical Pavement Design Guide (MEPDG) (1), the coefficients of the distress prediction models were determined through national calibration efforts using the Long-Term Pavement Performance (LTPP). But the LTPP database used to develop the calibrated distress models did not include test sections from Iowa. Thus, there is a need to recalibrate the models, if required, to use them for pavement design and rehabilitation in Iowa. As a first step in this direction, a preliminary sensitivity study was undertaken to assess the comparative effect of design input parameters pertaining to material properties, traffic and climate on performance of two existing flexible pavements in Iowa with relatively thick Asphalt Concrete (AC) layers. A total of 20 individual inputs were evaluated by studying the effect of each input on five different performance measures (longitudinal cracking, alligator cracking, transverse cracking, rutting, and roughness) for each pavement structure resulting in about 200 simulations using the MEPDG. A limited set of runs were also conducted to study the two-way interaction among the input variables (e.g., effect of traffic distribution on performance for varying AC surface thicknesses). The results showed that the predicted longitudinal cracking was influenced by most input parameters. Alligator cracking, roughness, and rutting in unbound layers remained insensitive to most input parameters. There is no input parameter that is sensitive to all the performance measures. Future research will focus on comparing the predicted measures against the recorded pavement distresses in the Iowa DOT’s Pavement Management Information System (PMIS) database.

Monograph Accession #:

01020180

Report/Paper Numbers:

06-2139

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Ceylan, Halil
Kim, Sunghwan
Heitzman, Michael
Gopalakrishnan, Kasthurirangan

Pagination:

25p

Publication Date:

2006

Conference:

Transportation Research Board 85th Annual Meeting

Location: Washington DC, United States
Date: 2006-1-22 to 2006-1-26
Sponsors: Transportation Research Board

Media Type:

CD-ROM

Features:

Figures (7) ; References; Tables (6)

Uncontrolled Terms:

Performance prediction

Subject Areas:

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Source Data:

Transportation Research Board Annual Meeting 2006 Paper #06-2139

Files:

TRIS, TRB

Created Date:

Mar 3 2006 10:53AM