#Faa pavement design software verification#
#Faa pavement design software crack#

#Faa pavement design software verification#

An essential element of the plan is a comprehensive test and verification program performed on real pavements subjected to full-scale loading. Federal Aviation Administration undertook a10-year comprehensive R&D program to resolve this dilemma. Extrapolation of existing criteria indicated that the pavements would need to be strengthened costing approximately $1.7 billion over several years. Pavement design procedures in existence before the introduction of these new aircraft were not adequate for analyzing how these aircraft would affect the design life of existing pavements. Over the past 15 years, aircraft manufacturers have introduced a new generation of airplanes that are longer, wider, and taller while increasing the number of landing gears to support the extra weight. This paper focuses on advances in airport pavement technology. The R&D programs conducted at the Technical Center provide necessary data for updating advisory circulars and equipment specifications. The Office of the Associate Administrator for Airports within the FAA maintains more than 100 advisory circulars that provide standards and guidance on: airport planning and design, airport equipment and construction, airport lighting and marking, airport pavement design and construction, runway safety, airport fire and rescue, and wildlife hazard mitigation. The AIP grants come with some strings: airport operators agree to meet FAA standards for design, engineering, and operations. airports are expected to spend several billion dollars on capital improvements, for which FAA will provide more than $2.5 billion in AIP (Airport Improvement Grant) grants. This database will facilitate retrieval of the data for later analysis.Airport Pavement Design for the 21st Century Sensor data collected during traffic test operations will be processed and stored in a computer database maintained on-site. Dynamic sensors measure quantities such as strain and pavement deflection in response to the load, and are triggered by the vehicle operations.

#Faa pavement design software crack#

Static sensors monitor temperature, moisture and crack status (resistance) on an hourly basis. Sensors are of two types: static and dynamic. Sensors have been embedded in the test items to collect data. The test vehicle is programmed for a controlled aircraft wander simulation. The rail-based test vehicle has two loading carriages that can be configured for up to six wheels per carriage with loads up to 333.75 kN (75,000 lbs) per wheel. All pertinent data and information collected at the NAPTF is arranged by construction cycles. A construction cycle includes test pavement construction, instrumentation installation, traffic tests to failure, post traffic testing (trenching activities and other tests), and pavement removal. Current plans are for the test pavements to be replaced and tested to failure on an 18-month cycle. In this way, a variety of pavement structures can be tested, including both rigid and flexible designs incorporating unbound aggregate and stabilized bases. Test items will be trafficked to failure and then reconstructed. The test track can be divided into independent test items on three subgrade classifications - low strength, medium strength and high strength.

Wheel loads independently adjustable up to 75,000 pounds per wheel.

Each truck having 1 to 10 wheels per truck.

Up to 20 test wheels capable of being configured to represent two complete landing gear trucks.

Rail-based test vehicle capable of simulating aircraft weighing up to 1.3 million pounds.

Fully enclosed instrumented test track 900 feet long by 60 feet wide.

Major features of the National Airport Pavement Test Facility are: Construction of the facility was completed in April 1999. Hughes Technical Center near Atlantic City, New Jersey, the National Airport Pavement Test Facility (NAPTF) provides high quality, accelerated test data from rigid and flexible pavements subjected to simulated aircraft traffic.

The FAA operates a state-of-the-art, full-scale pavement test facility dedicated solely to airport pavement research.

CC2 Test Items (Main Experiment) Database.

Pavement Materials Laboratory Capabilities.

National Airport Pavement & Materials Research Center.National Airport Pavement Test Facility.