Role of Principal-Plane Rotation in Flexible Pavement Deformation

• Published in: Journal of transportation engineering 1993-01, Vol.119 (1), p.124-141
• Main Author: Crockford, William W
• Format: Article
• Language: English
• Subjects: Airport runways; Applied sciences; Asphalt; Buildings. Public works; Concrete aggregates; Concretes; Deformation; Dynamic loads; Dynamic response; Exact sciences and technology; Fighter aircraft; Mathematical models; Road construction. Pavements. Maintenance; Strain; Stress analysis; Surfacing; TECHNICAL PAPERS; Transportation infrastructure
• ISSN: 0733-947X; 1943-5436
• DOI: 10.1061/(ASCE)0733-947X(1993)119:1(124)

Permanent deformation in the layers of a full-scale flexible pavement test section that was subjected to heavy fighter-aircraft loading (F-15) is presented as background information for designing a laboratory study of asphalt concrete subjected to realistic (but very slow moving) highway vehicle load simulation. A hollow cylinder specimen was used in the laboratory study. The correction factor for "dynamic effects" used in the Shell Pavement Design Manual, published in 1978, is explained in terms of rotation of principal planes of stress using hollow cylinder test results. A statistically significant difference is illustrated between the permanent strain resulting from laboratory testing with no principal-plane rotation and that resulting from testing with principal plane rotation. The tests were also able to identify statistically significant differences between two levels of wheel loading, two aggregates, and two asphalts. Dilatational, Bauschinger, and time-dependent effects were observed either directly or indirectly.