LEDFAA-1.3 is a computer program for airport pavement thickness design. It
implements layered elastic theory based design procedures developed under the sponsorship
of the Federal Aviation Administration (FAA) for new and overlay design of flexible and
rigid pavements. The layered elastic procedures, as implemented in the program, are the FAA
airport pavement thickness design standards referenced in Chapter 7 of Advisory Circular AC
150/5320-6D, change 3. The core of the program is Leaf, a layered elastic computational
program implemented, in this case, as a Microsoft Windows™ ActiveX dynamic link library
written in Visual Basic™ 6.0. Pavement thickness design needs many input parameters and
different input parameters have different influences on the pavement life. Pavement life is
insensitive to some parameters, a small change of the parameter has only limited effects on
the pavement life; however, for other parameters, life is very sensitive to changes in their
values; a small change will lead to significant change of the pavement life. Sensitivity
analysis is a powerful tool to clarify, verify, quantitatively understand, and compare existing
airport pavement design specifications. The results and findings of the study provide essential
information in modifying and improving the existing specifications and developing new ones.
Results from a parametric sensitivity analysis are presented in this paper. The findings are
being used to modify and improve the existing FAA airport pavement thickness design
models and in the development of the new FAA design models.
Publication Date
7/21/2019
Publisher
Parametric Sensitivity Analysi s for the FAA’s Airport Pavement Thickness Design Software LEDFAA-1.3
معالي الأستاذ الدكتور محمد طالب عبيدات | HE PROF. Moh’d Taleb Obaidat | 6133