Seismic analysis of buried pipeline networks

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5590854

Chung, M P

There is a long history of damage to underground pipelines due to earthquakes. An up-to-date overview of over 100 technical papers in the area of experimental sand field observations is provided. Important soil parameters which control the damage behavior of the pipelines were identified. It is concluded that more experimental and field data are needed before seismic resistant design regulations for the pipelines can be realistically formulated. Rubber gaskets are used in ductile cast iron pipelines to provide water tightness of the joint and sufficient flexibility in the pipelines to mitigate damage caused by earth settlement and earthquake ground motion. Evaluation of the bending mechanism reveals that the amount of the joint resistance depends on 1) mechanical properties of the rubber gasket, and 2) geometry of the gasket and spigot of the joint. For a buried pipeline network, its external loads usually come from the relative motion of two points on the pipeline due to the differential ground motion. Inertia effect is ignorable if the pipeline moves with the ground. The rubber-gasket jointed pipeline provides the best system of eliminating the inertia effect in the pipeline. Damage of the buried pipeline can be reduced by 1) increasing the depth of embedment, 2) placing the pipeline in a uniform embedment circumstance, 3) avoiding the build-up of large mass in the pipeline network, and 4) installing rubber gasket joints between connections.

• OSTI ID: 5590854
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
022000* -- Petroleum-- Transport
Handling
& Storage
03 NATURAL GAS
032000 -- Natural Gas-- Transport
Handling
& Storage
58 GEOSCIENCES
580201 -- Geophysics-- Seismology & Tectonics-- (1980-1989)
DAMAGE
DYNAMIC LOADS
EARTHQUAKES
ELASTOMERS
GASKETS
GROUND MOTION
JOINTS
MITIGATION
MOTION
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PIPE JOINTS
PIPELINES
POLYMERS
RUBBERS
SEALS
SEISMIC EFFECTS
SEISMIC EVENTS