Gravity Flow Reinforced Concrete Pipe Design

by Howard F. Peckworth,
John G. Hendrickson,

Serial Information: Journal of the Pipeline Division, 1964, Vol. 90, Issue 1, Pg. 33-48

Document Type: Journal Paper


Reinforcement was first added to concrete pipe to increase its structural strength in 1910 in Red Oak, Iowa. Reinforced concrete pipe has generally always been accepted on the basis of tests on the finished product. Structural strength was usually checked by subjecting the pipe to a concentrated crushing load known as a Three-Edge Bearing Test. Early research at Iowa State College related the strength developed in this test to the strength required for the pipe in place. Early attempts at a theoretical design of reinforced concrete pipe considered only bending moment in the pipe wall and ignored the high shearing stresses and radial tension developed in a three-edge bearing test. Specification requirements were based primarily on test results rather than theory. The revised ASTM C76 Specification for Reinforced Concrete Pipe, which appeared in 1957, did establish certain limits for standard pipe designs. For sizes and strengths above these limits, special designs using shear reinforcement and thicker walls, or both, are now customary.

Subject Headings: Reinforced concrete | Concrete pipes | Pipelines | Structural strength | Shear strength | Pipe flow | Load tests | Shear walls | Iowa

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