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- W79387617 abstract "The Aircraft Classification Number/Pavement Classification Number (ACN/PCN) method has been adopted as standard method for reporting airfield pavement bearing strength since 1980's. Recently, Federal Aviation Administration (FAA) developed an advisory circular to provide specific guidance on PCN determination. Even though new airport pavement design approach using FAARFIELD design software have been approved, the pavement thickness requirements associated with ACN-PCN procedures are based upon historical procedures identified in previous versions of AC 150/5320-6. The thickness mode for rigid pavements in latest COMFAA 3.0 program still uses FAA Westergaard method. The primary objectives of this study are to investigate its fundamental principles, reasoning of new revisions, and effects on PCN determination. The original development of ACN/PCN methodology was first reviewed. The newly revised approach using cumulative damage factors for computing PCN based on equivalent traffic was also discussed. A Visual Basic Application (VBA) module was added to conventional design spreadsheet (R805FAA) by executing COMFAA 2.0 program iteratively to automatically determine PCN value. The existing TKUAPAV program was recoded into an Excel spreadsheet with additional VBA modules to facilitate automatic PCN calculations using both R805FAA's bilinear fatigue relationship and PCA's fatigue equation. Revisions to existing ACN/PCN calculation procedure have been made and implemented in above spreadsheet based on four different failure models and two different critical stress models (edge or interior). A standard aircraft with a dual wheel main gear load of 90,000 lbs was introduced in this study to expedite critical aircraft conversions for PCN calculations. The potential problems of existing procedures and benefits of proposed revisions are compared and illustrated through different case studies. Attempts to simplify ACN/PCN definitions are proposed and discussed." @default.
- W79387617 created "2016-06-24" @default.
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- W79387617 date "2014-01-01" @default.
- W79387617 modified "2023-09-26" @default.
- W79387617 title "Development of Simplified PCN Approach for Reporting Rigid Airfield Pavement Bearing Strength" @default.
- W79387617 hasPublicationYear "2014" @default.
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