Volume 22, Issue 2 (March 1994)
Local Strain in Corrugated Pipe: Experimental Measurements to Test a Numerical Model
Measurements of local strain in corrugated steel and high-density polyethylene (HDPE) pipe are used to test the effectiveness of a three-dimensional finite element analysis. Measurements were made at the horizontal diameter for the pipes subjected to parallel plate loading, a load condition that produces significant strain gradients around the pipe as well as through the corrugation. The test values are used to evaluate the performance of elastic analysis for both steel and polyethylene pipes, as well as viscoelastic analysis used for the polyethylene pipe alone. It is demonstrated that the theoretical model generally yields estimates of local strain within 5 to 15% of the measured values. The viscoelastic predictions of local strain through a load-unload cycle on the HDPE pipe were very good. The load-deflection response of HDPE is predicted well for monotonic loading, but improvements in the viscoelastic model for HDPE appear necessary to improve predictions through a full load unload cycle.