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The following software programs, presentations and documents are available to the public. Software programs will be available for download as they become available. Beta releases are posted for testing and comments. The documents and presentations describe test item characteristics, test plans or analysis of the data collected at the NAPTF.
Go directly to: Please refer to the FAA's web site policy regarding liability of use.
SOFTWARE
Preliminary test plan and information for trafficking tests on asphalt overlays on deteriorated and rubblized rigid pavements. FAARFIELD 1.204 FAARFIELD README  FAARFFIELD 1.204 replaces the previous version that accompanied
Draft AC 150/5320-6E. For a list of changes, see the Readme file.Important Note: Minimum requirements to run FAARFIELD are Windows 2000, Service Pack 3, or higher (Windows XP recommended) and .Net framework installed in your system. You will need to install .Net Framework if the FAARFIELD installation fails with the message .Net is not installed. (You can also check for the folder "Windows folder\Microsoft.Net\Framework\" in Windows Explorer.)
FEAFAA 1.10 - 3D Finite Element Analysis of Rigid Airport Pavements FEAFAA (Finite Element Analysis - FAA) was developed by the FAA Airport Technology R&D Branch as a stand-alone tool for 3D finite element analysis of multiple-slab rigid airport pavements and overlays. It is useful for computing accurate responses (stresses, strains and deflections) of rigid pavement structures to individual aircraft landing gear loads. FEAFAA is not intended for use as an FAA design procedure. For performing pavement thickness designs in conformance with FAA standards, please download LEDFAA 1.3. FEAFAA README FEAFAA makes use of the 3D finite element programs (NIKE3D and INGRID) originally developed by the U.S. Dept. of Energy Lawrence Livermore National Laboratory (LLNL). These programs have been modified by the FAA for pavement analysis and are distributed according to terms of a Software Agreement between the FAA and LLNL. Note: Minimum requirements to run FEAFAA 1.10 are Windows 2000 or higher with 256MB of RAM. However, it is recommended that you have Windows XP or higher with 512 MB of RAM for best performance. For further information, please contact Dr. David R. Brill ZIP format, 16.13 MB LEDFAA 1.3 Computer Program for Airport Pavement Design (Readme) · Important Note: LEDFAA 1.3 is a 32-bit version and requires Windows 95/98, NT, or later. If you are running Windows 2000, it is recommended that you have Service Pack 3 or higher installed prior to installing LEDFAA 1.3.
COMFAA is a program
for computing flexible and rigid Aircraft Classification Numbers (ACNs) and
pavement thickness. The program runs under Windows 2000, XP, and higher. The
program is used for pavement thickness design in the procedure required for PCN
determination by the technical evaluation method, as described in FAA Advisory
Circular 150/5335-5A "Standardized Method of Reporting Airport Pavement Strength
- PCN." The program now has an option to select the new ICAO alpha factors for
flexible pavements. A340-500/600 aircraft are not yet included in the internal
aircraft library. They will be included when definitive belly gear load
characteristics are provided to the FAA. In the mean time, please consult the
Airbus airport planning manual to obtain ACN values or gear dimensions and
loading. This posting was made on February 1, 2008. COMFAA README
For further information, please contact Dr. Gordon Hayhoe BAKFAA with LEAF, is a software program for backcalculation of FWD data and computation of airport pavement load responses by layered elastic analysis. After downloading and unzipping the files, the setup file should be run to install the program on your computer. The FAA does not officially support the program as a standard nor sanction any use of the results. This software program is offered free of charge and is provided for evaluation purposes only. BAKFAA README July, 2003: LEAF modified to correct a sign error in the implementation of the variable interface bonding. Two additional matrix equation solvers added to give accurate results over the full range of possible input structures and load conditions. The appropriate solvers are selected automatically during response calculation, but with an override function if the user wishes to select a particular solver. April 16, 2004: BAKFAA modified to read AASHTO Pavement Deflection Data Exchange 1.0 (PDDX) files. September 2, 2005: BAKFAA modified to read Dynatest files which have numbers in a row with no delimiting spaces between the numbers. January 3, 2006: BAKFAA tab order modified for more convenient manual data entry. March 18, 2008: Modified the PDDX and R80 FWD file read subroutines.
This program is furnished by the Government and is accepted and used by the recipient with the express understanding that the United States Government makes no warranties, expressed or implied, concerning the accuracy, completeness, reliability, usability, or suitability of any particular purpose of the information or the data contained in this program or furnished in connection therewith, and the United States Government shall be under no liability whatsoever to any person by reason of any use thereof. This program belongs to the government. Therefore, the recipient further agrees not to assert any proprietary rights therein or to represent this program to anyone as other than a government program. The backcalculation software program is compressed in a Zip format. You can download a free evaluation copy of WinZip by clicking on the following image.
For further information, please contact Dr. Gordon Hayhoe
Presentations The following Power Point program reflects the status of the National Airport Pavement Test Facility Construction Cycle 2.
Alpha
Factor Determination for 6-Wheel Gears The following Power Point program was presented to:
The following Power Point program was presented to:
"Permanent Deformation Behavior of Granular Layers Tested at National Airport Pavement Test Facility"
Authors: Gordon F. Hayhoe, Navneet Garg This document describes the material properties and characteristics of the pavement test items at the National Airport Pavement Test Facility. The following compressed file (in .ZIP format) may also be downloaded to accompany the above document. Material Properties Database spreadsheets in ZIP format. DOCUMENTS Report DOT/FAA/AR-04/46, "Operational Life of Airport Pavements" Authors: Navneet Garg and Gordon F. Hayhoe Results are described from asphalt strain gage measurements made during pavement response tests on the flexible pavement test items at the National Airport Pavement Test Facility (NAPTF). Tests were run at various speeds and loads with dual wheel configurations. PDF format, size:189 K Authors: Gordon F. Hayhoe, Robert Cornwell, Navneet Garg Airport pavement thickness design procedures predict a significant amount of interaction between the loads from multiple-wheel and closely spaced multiple-truck landing gear configurations. PDF format, size: 428 K Posttraffic Testing at the National Airport Pavement Test Facility: Test Item MFC DOT/FAA/AR-TN01/49 The conventional flexible pavement test item on medium-strength subgrade (MFC) exhibited ruts 4 to 6 inches (100 to 150 mm) deep with upheaval outside the traffic lane and asphalt surface (AC) cracking in the wander pattern. A trench was dug to conduct posttraffic investigation into the failure mechanism of the pavement structure. PDF format, size: 7.9MB Authors: Roy D.
McQueen, Wayne Marsey and Jose M. Arze PDF format, size: 42 KB Verification of Curling In PCC Slabs At FAA National Airport Pavement Test Facility Authors: Edward H. Guo, Wayne Marsey During the testing period from the summer to winter of 1999, heavy weight deflectometer (HWD) tests were routinely conducted on the three Portland Cement Concrete (PCC) test items in the FAA's National Airport Pavement Test Facility (NAPTF). The analysis of the HWD data indicates ... PDF format, size: 49.1 KB Report of Strain Gage Verification Tests for the National Airport Pavement Test Facility Submitted by Construction Technology Laboratories, Inc PDF format, size: 268KB Airport Pavement Roughness with Nighttime Construction Authors: Gordon Hayhoe, Mingyao Dong, Roy D. McQueen Surface elevation profiles are measured before and after overlay operations on runways at two commercial airports in the USA.Each airport had only one runway. All overlaying was done at night, with the airports opened for normal operations during the day. The profiles were measured with an inertial profiler having software compensation for accelerometer errors. Pavement surface elevations measured with normal surveying rod and level equipment are compared with the profiler elevation measurements for one of the runways. PDF format, size 152KB Field Survey and Analysis of Aircraft Distribution on Airport Pavements Prepared by Victor A. HoSang Porous Portland Cement Concrete: the State of the Art Author: Alfred Monahan FAA presentations for the 9th Plenary Meeting of U.S.- Japan Science & Technology Experts Meeting The size of some of the software programs requires the files to be compressed and are in *.zip format. You may download a free evaluation copy of WINZIP by following the link below. Last Update: 12/18/08 |
