Pdf airfield pavement design for a major airport using faarfield. This is an introduction to rigid pavement design for engineers. Faarfield new faa airport pavement thickness design software. Replacement of faarfield tandem factors with cumulative. Rigid pavement design 12, 2007 federal aviation 5 november 15, 2007 administration summary of advantages and disadvantages of 3dfem advantages disadvantages properly models rigid may require long computation pavement features including times. Gear location and wander considered for each aircraft use miners rule to sum damage for each strip must input traffic mix, not design aircraft chapter 3 pavement design. Faarfield as its standard thickness design procedure for airport pavements in september 2009. It is not intended as definitive treatise, and it does not encompass the design of flexible pavements. Airfield pavement, airport, design, faa, icao, orientation, runway, windrose. Due to this property of pavement, when the subgrade deflects beneath the rigid pavement, the concrete slab is able to bridge over the localized failures and. Airport pavement design and evaluation, dated september 30, 2009.
These program upgrades accompanied a thorough revision of advisory circular ac 15053206 covering airport pavement design and evaluation. Ac 15053206e, airport pavement design and evaluations, 30. Faarfield considers the cumulative damage factor cdf in the subgrade for the design of airport pavement layers. Introduction to rigid pavement design ced engineering. The paper presents a case study describing the design of airfield pavements for a major airport using both the faarfield and apsds aircraft pavement structural design system procedures developed.
Rigid pavement design part i november 7, 2012 7 basic starting structures in faarfield section name pavement type acaggregate new flexible on aggregate base aconflex hma overlay on flexible pavement aconrigid hma overlay on rigid pavement newflexible new flexible on stabilized base new rigid new rigid on stabilized base pcconflex pcc. It estimates the support of the layers below a rigid pavement surface course the pcc slab. Available software include faarfield, comfaa, compsys, and other programs. Icao overloading practice versus airport pavement design life. Faarfield rigid incl 3d fem finite element method road surface. Faarfield rigid incl 3d fem free download as powerpoint presentation. Faarfield new faa design software for airport pavement thickness. Federal aviation 43 administration rigid pavement design part i november 7, 2012 flexural strength requirements ac 15053206e airport pavement design and evaluation p. Faarfield incorporates the effects of airplane wander through a computed passtocoverage pc ratio. Evaluation of airport flexible pavement hma fatigue using. Introducing federal aviation administration faarfield 1. The calculation scheme is made by using threedimensional finite. Ac 15053206f, airport pavement design and evaluations, 10. Ac 15053206f, airport pavement design and evaluations.
Guidelines cover and front matter v2 auburn engineering. The pc ratio is computed at the top of the subgrade for flexible pavements and at the pavement surface for rigid pavements. Rigid and flexible iterative elastic layered design faarfield is the new faa airport pavement thickness design program. Ac 15053206f airport pavement design and evaluation. To avoid typing the airplane list by hand, try copying the above job file to the working directory and opening it in faarfield.
Included all pavement design in chapter 3, including previous guidance on pavement design for airplanes weighing less than 30,000 pounds 610 kg. The new computer program will become the faa standard with the release of advisory circular ac 15053206e in early 2008. Layered design faarfield as its standard thickness design procedure for airport pavements in september 2009. Federal aviation administration overview ac 15053206f airport pavement design and evaluation whats different faarfield v1. This advisory circular provides guidance to the public on the design and evaluation of pavements used by aircraft at civil airports. The main differences between the faarfield rigid pavement design procedure and the procedure as implemented in ledfaa 1. Section 5 rigid pavement construction standard specification for urban infrastructure works 55 edition 1, revision 0 september 2002 testing a testing authority shall be employed by the contractor to carry out all testing. For jointed concrete pavements, regardless of whether reinforced or nonreinforced, the aashtoodot method of pavement design calculates the same. There are many different types of empirical equations available today but this section will present the 1993 aashto guide basic design equation for rigid pavements as an example. Using faarfield the federal aviation administrations faa new airport pavement thickness design program, faarfield faa rigid and flexible iterative elastic layered design, is expected to supersede ledfaa 1. For rigid pavement design, faarfield uses the maximum horizontal stress at the bottom edge of the pcc slab as the predictor of pavement structural life. Rigid pavement design brief background on 3d finite element example new rigid design rigid overlay design.
The faa recommends the guidance and standards in this ac for airport pavement design and evaluation. Runway design and structural design of an airfield pavement. Paul guyer is a registered civil engineer, mechanical engineer, fire protection engineer, and architect with over 35 years experience in the design of buildings and related. Engineers are cautioned that much of pavement design is governed by codes, specifications and practices of public agencies. Dotfaaar0957 calibration of faarfield rigid pavement. Faarfield stands for faa rigid and flexible iterative elastic layered design. Final iterations are done using a 3d finite element model 3dfem.
Rigid pavement design 5 administration faarfield 1. Heavy vehicles cause greater deflection on flexible pavements rather than on rigid pavements. Introduction to flexible pavement design ced engineering. Rigid pavement design leaf is used to generate a preliminary thickness. Pcc overlays on flexible pavement same principle as new rigid design.
Icao overloading practice versus airport pavement design. Faarfield overlay design pcc on rigid overlayspcc on rigid overlays. It is not intended as definitive treatise, and it does not encompass the design of rigid pavements. In the design of a rigid pavement, the flexural strength of concrete is the major factor and not the strength of subgrade. The pc ratio is always computed at the top of the subgrade for flexible pavements and at the pavement surface for rigid pavements. Pdf icao overloading practice versus airport pavement. Advances in faa pavement thickness design software. Compared to flexible pavement, rigid pavements are placed either directly on the prepared subgrade or on a single layer of granular or stabilized material. Pdf the paper presents a case study describing the design of airfield.
Rigid pavements have sufficient flexural strength to transmit the wheel load stresses to a wider area below. Subbase thickness10 subbase modulus30,000 psi subgrade m r10,000 psi to get k. Rigid pavement design 18 administration faarfield 1. Added tables for minimum layer thickness for flexible and rigid pavement structures. More than half of all airport improvement program funds go toward constructing or rehabilitating runways, taxiways, and aprons. The study is conducted using hurghada, egypt airport air fleet composition at four annual departure. Federal aviation 31 administration rigid pavement design december 8, 2010 estimate %cdfu pexample assume the following traffic mix was applied to the g. The federal aviation administrations faa new airport pavement thickness design program, faarfield faa rigid and flexible iterative elastic. The newly released program, designated faarfield 1. Report iprf01g002052 joint load transfer in concrete. Concretes rigid design reduces the pavement s deflection and corresponding fuel consumption. The federal aviation administrations faa new airport pavement thickness design program, faarfield faa rigid and flexible iterative elastic layered design, is expected to supersede ledfaa 1.
Load capacity of the dowel system is 40 percent of design wheel load. Airport design software supports pavement design and pay reductions for airport pavement projects. Design of rigid pavement the soil sub grade is a layer of natural soil prepared to receive the other layers of the pavement the loads on the pavements are ultimately taken by the soil sub grade and dispersed to the earth mass below. Pdf airfield pavement design for a major airport using. Throughout the development of the military rigid airfield design procedure, the ability of properly constructed joints in the pavement to transfer loads between slabs has been recognized and has been a fundamental part of the military rigid airfield pavement design criteria.
Back calculated e modulus value or k value in faarfield. Parameter sensitivity analysis of airport rigid pavement. Added detail for transition between pcc and hma pavement sections. Design size and spacing of dowel bars at an expansion joint of concrete pavement of thickness 20 cm. Added detail on reinforcement at a reinforced isolation joint. Phase 2 phase 1 results faarfield flexible pavement design faarfield flexible pavement design faarfield flexible pavement design faarfield flexible pavement design. The layer properties of permeable pavements for use in these structural design methods are discussed in the following sections. Different pavement types use different types of joints and reinforcement to control the forces acting on the concrete pavement. Unlike ledfaa, the faarfield program incorporates threedimensional finite element 3dfe stress computation 2, 3, 4, and 5 for final design of new rigid pavements and rigid overlays.
However, use of the standards in this ac is mandatory for all projects funded under the airport. Faarfield flexible pavement design by alaa al masri on prezi. Read guidance for usage of permeable pavement at airports. Developing rigid airport pavement multipleslab response models. Faarfield rigid incl 3d fem finite element method road.
Fleebe ae etxible pavement administration design faarfield 1. Nov 05, 2016 which is defined as the pressure per unit deflection of the foundations as determined by plate load test the modulus of subgrade reaction k is used as a primary input for rigid pavement design. Faarfield implements both layered elasticbased and threedimensional finite elementbased design procedures for new and overlay desi gns of flexible and rigid pavements, respectively. For the analysis of the design parameters for rigid pavement airport structures it has been used a computer based analysis on finite element ansys 11 u. Faarfield provides the required thickness for all individual layers of flexible pavement surface, base, and subbase needed to support a given airplane traffic mix over a particular subgrade. When the pavement deflects or moves, it absorbs a portion of the vehicle energy that otherwise would be available to propel the vehicle forward.
This is an introduction to flexible pavement design for engineers. Airport runways, neural networks, pavement design, rigid pavements. Flexible pavement design july 11, 2012october 2, 20 enter traffic mixture the job file workshop. Faarfield includes a layered elastic analysis routine for flexible pavement. Flexible pavement design leaf is used for all structural computations. Change subgrade k to 27 mpam click end modify change r to 4. Full depth layered granular bound layers surface treatment. Development of new subgrade failure model for flexible. Flexible pavement design international civil aviation. The objective of the study is to evaluate the impact of new large aircraft nla on airport flexible pavement versus overloading in icao practice. Defined regular use for pavement design as at least 250 annual departures, which is equivalent to 500 annual operations. Ac 1505320 6e and faarfield march 2008 17 traffic model cumulative damage factor cdf is calculated for each 10 inch wide strip over a total 820 inch width.
The faa has made a preliminary version of this program, called fedfaa, available for download since 2004. The current faarfield design procedure for flexible pavements accounts for. Rigid pavement design 2 administration faarfield 1. New rigid pavement design example pavement structure. Cut across the e sb cut across m r to the tl vertically meet other line read kvalue k600pci topic 10 aashto rigid pavement design figure 12. A typical cross section of the rigid pavement is shown in figure 3.
Development of new subgrade failure model for flexible pavements in faarfield in november 2016, the united states federal aviation administration faa released an updated version of its standard computer program for airport pavement thickness design and evaluation, faa rigid and flexible iterative elastic layered design faarfield. Rigid pavement design brief background on 3d finite element example new rigid design rigid overlay design example. December 8, 2010 starting screen no job files created click on new job federal aviation 2 administration flexible pavement design december 8, 2010. Faa guidelines and icao design criteria are strictly followed in the design and orientation of the runway. Rigid pavement design international civil aviation.
Sep 18, 2017 airport design software supports pavement design and pay reductions for airport pavement projects. Use same traffic mix as in the new rigid pavement design example. Engineers must always determine the requirements of the. Airport pavements have been constructed using portland cement concrete.
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