BETA Testing Development of Advanced Airport Pavement Design Procedures LEDFAA 1.2 (AC 150/5320-6) ADVANCED MATERIAL MODELS NEW STRUCTURAL MODELS
Advanced Airport Pavement Design Project Benefits Potential capital costs avoided. – Avoid restricting loads of air carriers. – Avoid unnecessary strengthening of existing pavements and structures. – Avoid cost of delays. $1.7 billion of capital costs avoided over the next several years.
National Airport Pavement Test Facility (NAPTF) Required For: FAA design procedures for multiple- wheel landing gears, flexible and rigid – precipitated by B wheel – NLA (A380, B-747 Stretches) Aircraft design (number of wheels, number of gears, configuration - NLA and HSCT) ICAO ACN-PCN
Who FAA / Boeing Cooperative R&D Agreement – Funding and Technical Specifications – Management Board – Advisory Working Group Corps of Engineers, Philadelphia District – Design Build Contract Administration DMJM/Cornell – Design Build Contractor
Working Group Representation – FAA and Boeing – University of Illinois FAA Center of Excellence – US Army, Air Force, and Navy – ACPA, Asphalt Institute – Canadian, French, Australian Government – PANY&NJ, BAA, ADP, Narita – Visitors
When AAS requirements meeting First AAR W.G. meeting Brochure Design and Cost Study RFP Contract awarded Completed (handover) Response tests completed January, 1992 October, 1992 July, 1993 October, 1993 May, 1995 June, 1996 April, 1999 October, 1999
How Design / Build Contract DMJM / Cornell Joint Venture – Weidlinger for foundations – CTL for pavement instrumentation – Cornell and Design Projects for test vehicle – ARA for pavement design (except thickness) U.S. Army Corps of Engineers, Philadelphia District, for project management
How Much $21 million total contract – $14 million - FAA – $7 million - Boeing Commercial Airplane Co. $1 to $3 million continuing annual costs (depending on pavement reconstruction) provided by FAA
Aerial View During Construction
Trafficking Rigid Pavement
Trafficking a Severely Rutted Flexible Pavement
Fun For Some…..Data For Others
Trench in CC3-LFC2 Upheaval
Profiles are at 1,000 repetition intervals. Final is 13,200 repetitions. MFC2 Transverse Profiles from Start to Finish
Pavement Software Products All programs for use on desktop PCs
Report on Operational Life of Airport Pavements …determine whether the FAA standards used to determine the appropriate thickness for asphalt and concrete airfield pavements are in accordance with the FAAs standard 20-year-life requirement... FY04 Congressionally Mandated Report
Final Report DOT/FAA/AR-04/46 Office of Aviation Research Washington, D.C December 2004 Operational Life of Airport Pavements … airport pavements designed following AC 150/4320-6D have sufficient thickness to provide a 20-year structural life. Available from or
ACN Analysis for ICAO Establish alpha factor for six-wheel gears from. – Existing theoretical framework – Combined NAPTF and previous test data Report has been prepared and submitted for consideration by the ICAO ACN Study Group.
Pavement Design Workshops (FEDFAA Beta / LEDFAA 1.3) Four pavement design workshops in 2004: – Tokyo, Japan (May 2004) – Denver, CO (June 22) – Arlington, VA (July 29). – Beijing, China (Sept ) Covered updates to LEDFAA 1.3 software. Introduced FEDFAA Beta. Additional workshops planned in
FEDFAA Beta Release Evaluation version of FEDFAA posted on the AAR-410 web site September FEDFAA 1.3 Beta posted September 8, The beta release demonstrates all planned functionality of the new program. Beta design thicknesses are preliminary. – Version 1.3 gives thicknesses approximately the same to thinner as existing design procedures.
Achievments Savings from reduced thickness requirements. Savings from avoidance of pavement strengthening. Guidance for ICAO ACN for six-wheel gears. Guidance for runway shoulder conversion for Group 6 aircraft (FAA Engineering Brief 65)