Accession Number : ADA138212

Title :   Development of Probabilistic Rigid Pavement Design Methodologies for Military Airfields.

Descriptive Note : Final rept.,


Personal Author(s) : Witczak,M W ; Uzan,J ; Johnson,M

PDF Url : ADA138212

Report Date : Dec 1983

Pagination or Media Count : 210

Abstract : The current Corps of Engineers design procedures for rigid airfield pavements is based on the Westergaard free edge stress slab theory, and a proposed procedure is based on the multilayer elastic theory. These two design procedures have been expanded to airfield pavement designs expressed in probabilistic and reliability terms. Further developments were required in these procedures to make the analysis more practicable. Two major investigations were conducted: (a) Evaluation and use of the composite modulus of elasticity for layers beneath the rigid pavement, and (b) Evaluation of the maximum tensile stress at the bottom of the slab for different aircraft types. Derivations obtained from the investigation of the composite modulus and maximum tensile stress are reported and are included in computer programs for probabilistic/reliability analysis of rigid pavements. The approximate closed form (Taylor series expansion) is utilized. Example runs of the computer program are presented.

Descriptors :   *Pavements, Airports, Soils, Layers, Modulus of elasticity, Reliability, Tensile stress, Mathematical models, Computerized simulation, Computer programs

Subject Categories : Civil Engineering
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE