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原文传递 RUTTING RATE ANALYSES OF THE AASHO ROAD TEST FLEXIBLE PAVEMENTS.

题名：	RUTTING RATE ANALYSES OF THE AASHO ROAD TEST FLEXIBLE PAVEMENTS.
作者：	Thompson-MR; Nauman-D
关键词：	AASHO-ROAD-TEST; FLEXIBLE-PAVEMENTS; RUTTING-; RUTTING-RATE-MODEL; STRUCTURAL-RESPONSE; PAVEMENT-DESIGN; PAVEMENT-PERFORMANCE
摘要：	Asphalt concrete (AC) fatigue cracking, AC low-temperature cracking, and pavement surface rutting are the flexible pavement distress modes normally considered in flexible pavement analysis and design. AC fatigue cracking and rutting in component pavement layers (AC surface, granular base and subbase layers, and subgrade) are related to structural responses (stress-strain-deflection). Pavement rutting is discussed. One practical and applied pavement rutting approach is to correlate structural responses (stress-strain-deflection) with field distress measurements. The forms of laboratory-based material/soil distress models are helpful in establishing the general parameters that best define the structural response-field distress measurement relationships. The NCHRP 1-26 Phase 1 Final Report indicated that the log permanent strain (epsilon sub p)-log load repetitions (N) phenomenological model was an appropriate, versatile, and practical approach. Paving materials (AC and granular base/subbase) and subgrade soils generally follow the model. It is assumed that a phenomenological pavement surface rutting model would be of the same form. An analogue, a proposed pavement surface rutting rate (RR) model is evaluated: RR = RD/N = A/(N supra B), where RR is the rut depth in inches, N is the number of repeated load applications, and A and B are terms developed from field calibration testing data. The RR model was validated by analyzing selected AASHO Road Test data and rutting performance information from Illinois Department of Transportation rehabilitated sections of the AASHO Road Test flexible pavement tangent sections. The analyses indicated that the RR concept is valid. Stable pavement rutting trends were related to ILLI-PAVE estimated pavement structural responses, particularly the subgrade stress ratio. Similar RR performance (the B values in the RR equation) was noted for the original AASHO sections, reconstructed sections built with salvaged AASHO materials, and new sections constructed with similar paving materials. The RR approach can be effectively used in a priori pavement analysis and design and pavement management system activities. For the typical "generic specification" flexible paving materials used by a highway agency, the B terms and relationships relating structural responses to A can be established from a flexible pavement performance data base.
总页数：	Transportation Research Record. 1993. (1384) pp36-48 (16 Fig., 1 Tab., 16 Ref.)
报告类型：	科技报告