NEHRP Clearinghouse

Title
Strength and Dynamic Characteristics of Mechanically Jointed Cast-Iron Water Pipelines.
File
PB285727.pdf
Author(s)
Kratky, R. G.; Salvadori, M. G.
Source
National Science Foundation, Washington, D.C. Applied Science and Research Applications., June 1978, 48 p.
Abstract
The report expands on the earlier Interim Grant Report IR-3, July 1977. Elastic and dynamic characteristics of both mechanical joints with rubber gaskets and cast-iron pipes are discussed. The main characteristics for pipe failure are the ultimate tension force and the ultimate bending moment. Practical observations confirm that other modes of failure seldom occur, although some compression failures have occurred. Bolt failure, ultimate gasket friction, the longitudinal elastic constant of gasket, longitudinal periods of pipe due to gasket elasticity, longitudinal periods of pipe due to pipe elasticity, the rotational constant of gasket, periods of rotational motion due to gasket, and periods of vibration for vertical anti-symmetrical rotational modes of continuous elastic pipes are topics discussed. Some calculations are carried out as examples.
Keywords
Failure; Rubber gaskets; Elastic properties; Earthquake engineering; Earthquake resistant structures; Stress analysis; Pipelines; Earthquakes; Water pipes; Cast iron; Water pipelines; Tensile strength; Earth movements; Piping systems; Pipe joints; Subsurface structures; Metal pipe; Bending moments; Bolted joints; Dynamic structural analysis