Kim, H.-B., Harichandran, R. S., and Buch, N. (1998). "Development
of load and resistance factor design format for flexible pavements."
Canadian Journal of Civil Engineering, 25(5), 880885.
Abstract
The objective of pavement design, just as with the design of other
structures, is to provide economical designs at specified levels of
reliability. Methods that yield designs with different levels of
reliability are undesirable, and over the course of time design
approaches in the United States have converged toward the load and
resistance factor design (LRFD) format in order to assure uniform
reliability. At present the LRFD format has been implemented in
concrete, steel, wood, and bridge design specifications. In this paper,
reliability concepts are used to illustrate the development of an LRFD
format for fatigue design of flexible pavements. It is shown that 10
candidate pavement sections designed against premature fatigue failure
according to standard practice using the DNPS86 software do not have
uniform reliability. It is demonstrated that uniform reliability can be
achieved by using the LRFD format. The work reported is based on assumed
variations of pavement layer properties and an analytical formulation;
field verification was not attempted.