The effect of plastic behavior on damping in piping systems

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5910396

Ware, A. G.

Due to energy dissipated by plastic action, the equivalent damping that must be used in stress analyses to predict moments and stresses is much higher than damping for elastic response. High strain damping data from eight different sources were plotted on a common basis as a function of ductility to estimate damping levels at system failure. At the strain levels when systems fail, equivalent damping values are estimated to be 30 to 50% of critical. This results in a response margin of actual input acceleration to linear elastic computed acceleration (using 5% of critical damping) of from 2.5 to 3 for seismic excitations and from 6 to 10 for sinusoidal excitations. 6 refs., 6 figs., 1 tab.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 5910396
• Report Number(s): EGG-M-88343; CONF-890855-15; ON: DE89009739
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
220900* -- Nuclear Reactor Technology-- Reactor Safety
DAMPING
FUNCTIONS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
PIPES
POWER PLANTS
REACTOR SAFETY
RESPONSE FUNCTIONS
SAFETY
SEISMIC EFFECTS
STRAINS
THERMAL POWER PLANTS