Flexible pavement design

The above separation of the flexible pavement structure is based on the different mechanical performance of the layers and constitutes the base for the development of any flexible pavement design methodology. 

Zhou E, E. Fernando, and T. Scullion. 2010. Development, Calibration, arui Validation of Performance Prediction Models for the Texas M-E Flexible Pavement Design System. FHWA/rX-10/0-5798-2. Springfield, VA National Technical Information Service. 

With regard to analytical flexible pavement design methodologies, a brief description is given to the Shell method (Shell International 1985) and the ALIZE-LCPC (2011) method. 

The design criteria or distress modes adopted by most analytical and semi-analytical methodologies for flexible pavement design are as follows (a) fatigue of treated layers, that is, the asphalt layer or the hydraulically bound layer not to crack under the influence of traffic and (b) deformation of the subgrade, that is, the subgrade to be able to sustain the traffic without excessive deformation. 

Figure 13.2 Flow diagram for Asphalt Institute flexible pavement design methodology procedure. (From Asphalt Institute, MS-1, The Thickness Design, Asphalt Pavements for Highways Streets, Manual Series No. I [MS-1], 9th Edition, Lexington, USA Asphalt Institute, Reprinted 1999. With permission.)...

Figure 13.6 Flow chart of AASHTO flexible pavement design method.

Figure 13.12 Flow chart of UK flexible pavement design methodology.

Figure 13.20 Flow chart of AUTh flexible pavement design methodology. (From Nikolaides, A.F., Flexible Pavements Pavement Design Methodology, Bituminous Mixtures, Antiskidding Layers, 1st Edition. Thessaloniki, Greece A.F. Nikolaides. ISBN 960-91849-1-X, 2005.)...

The design procedure for a flexible pavement design is as shown in Figure 13.24. 

Figure 13.24 Austroads design procedure for flexible pavement design. (From Austroads, Guide to Pavement Technology Part 2 Pavement Structural Design. Publication No. AGPT02-I2. Sydney Austroads Inc., 2012. With permission.)...

Figure 13.27 Design strategies that can be simulated with the MEPDG for new flexible pavement design.

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