The Analysis of Federal Aviation Administration Software program's Results in Airport Runway Pavement Design

Several software programs have been provided for runway pavement design by the Federal Aviation Administration (FAA)، among these software programs، using LEDFAA and FAARFIELD is more prevalent، because they are capable to calculate Cumulative Damage Factor (CDF) for each aircraft. In this paper، first the structure of software in runway pavement design has been reviewed، and then the sample airport design has been done by both programs. Then Cumulative Damage Factor for each aircraft have been obtained by each software program. According to the design results، pavement thickness and CDF contribution for aircrafts were compared. The analysis shows that FAARFIELD due to the ability of design based on three dimensional finite element method، predicts more realistic pavement behavior under the aircraft loading، and this software design is more economical.