Page 319 - Buried Pipe Design
P. 319
290 Chapter Six
Design Method
Ultimate Ring Compression Stress F c (kips per square inch)
Pipe Diameter D (inches) Corrugations
Figure 6.4 Ultimate ring compression stress as a function of diameter and corrugations for
various values of soil density in percent of standard as determined by AASHTO method T-99.
The performance limit for buried corrugated steel pipes is not a single
phenomenon, but the interaction of a number of phenomena. For exam-
ple, performance limit is not simply crushing of the wall, buckling of the
wall, shearing of the longitudinal seam, or ring deflection. Each of these
influences the others, and all are interrelated to varying degrees under
varying circumstances. As might be anticipated, the crushing strength
of the wall is less if the ring deflection is large. This is due to flexural
