Mechanistic Design Models of Loading and Curling in Concrete Pavements

by Ying-Haur Lee, Univ of Illinois, Urbana, United States,
Michael I. Darter, Univ of Illinois, Urbana, United States,



Document Type: Proceeding Paper

Part of: Airport Pavement Innovations?Theory to Practice

Abstract:

Determination of the critical bending stress at the edge of a concrete pavement due to individual and combination effects of wheel loading and thermal curling is very crucial to any mechanistic based design procedure. This paper first presents the recent discovery of two additional dimensionless mechanistic variables such that the problems encountered in previous investigations using dimensional analysis for thermal-related curling problems are resolved. A new regression technique (projection pursuit regression) together with traditional linear and nonlinear regressions were utilized to develop prediction models. Subsequently, closed-form mechanistic design models which have been carefully validated and ready for implementation in a spreadsheet or computer program are presented. These prediction models turned out to be a very accurate representation of the finite element model. They are also simple, easy to comprehend, dimensionally correct, and may be extrapolated to wider ranges of input parameters.

Subject Headings: Pavement design | Thermal analysis | Concrete pavements | Vehicle loads | Regression analysis | Computer models | Thermal loads

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