Design of Flexible Pavements and Overlay Using an Expert System

Abstract

EXSPAV is an expert system program established for use in flexible pavement and overlay design. It helps transfer and facilitate the knowledge of experts and results of research and practice to the hands of the less experienced design engineer. It incorporates a versatile design approach, which also facilitates the prediction of the structural performance of pavements. EXSPAV was developed in the EXSYS environment and assimilates Ohio State University's predictive program of flexible pavement structural performance. It also has an overlay design module. EGYPAV is a knowledge-based pavement design program developed in the structure of EXSPAV. Its knowledge base was compiled through consultation with experts from the Roads and Bridges Authority, local universities, and construction companies. The base reflects experience, data, and research results for traffic, environmental conditions, pavements, and material characterization in Egypt. It also includes suggested designs of pavement structure for various combinations of design parameters. The program user may check the suggested design and find its structural performance through the inference engine–deterministic model interaction of the EGYPAV itself.

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References

Bernandi

, and Sardinha

P. R. C.

. Concepts and Practice of Expert Systems in Civil Engineering. In Applications of Artificial Intelligence in Engineering, Volume 2. Computational Mechanics Inc., Southampton, England, 1993.

Goh

A. T. C.

Advisory Expert System for Flexible Pavement Design. Artificial Intelligence in Engineering, Vol. 8, No. 1, 1993.

Kuprenas

J. A.

, Salzar

, and Posada

. Expert System for the Identification of Causes of Failure of Asphalt Concrete Pavements. In Computing in Civil Engineering, Volume 1. New York, 1995.

Ritchie

, Kim

, and Prosser

. Pavement Rehabilitation Analysis and Design Mentor. Proc., VTT Symposium, Technical Research Center of Finland, Vol. 1, No. 116, 1990.

Chou

Y. J.

Knowledge-Based System for Flexible Pavement Structural Evaluation. Journal of Transportation Engineering, ASCE, Vol. 119, No. 3, May–June 1993.

EXSYS: Expert System Development Package. Exsys, Inc., Albuquerque, N. Mex., 1988.

Majidzadeh

, Aly

M.G.

, Bayomy

F. M.

, and Elaithy

. Implementation of a Pavement Design System. Report EES 578. Ohio State University, Columbus, 1980.

Majidzadeh

, Bayomy

, and Khedr

. Rutting Evaluation of Sub-grade Soils in Ohio. In Transportation Research Record 671, TRB, National Research Council, Washington, D.C., 1978, pp. 75–84.

Khedr

Deformation Characteristics of Granular Base Course in Flexible Pavements. In Transportation Research Record 1043, TRB, National Research Council, Washington, D.C., 1985, pp. 131–138.

10.

Majidzadeh

, Khedr

, and El-Mojarrush

. Evaluation of Permanent Deformation in Asphalt Concrete Pavements. In Transportation Research Record 715, TRB, National Research Council, Washington, D.C., 1979, pp. 21–31.

11.

Khedr

S. A.

Deformation Mechanism in Asphaltic Concrete. Transportation Engineering Journal, Vol. 112, No. 1, 1986.

12.

Elmitiny

M. R.

Material Characterization for Studying Flexible Pavement Behavior in Fatigue and Permanent Deformation. Ph.D. dissertation. Ohio State University, Columbus, 1980.

13.

Thompson

M. R.

, and Elliott

R. P.

. ILLI-PAVE-Based Response Algorithms for Design of Conventional Flexible Pavements. In Transportation Research Record 1043, TRB, National Research Council, Washington, D.C., 1985, pp. 50–57.