Response of seismic-isolated structures under long-period motions

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5649313

Ma, D C

In the past decade, considerable progress has been made on reducing the seismic response of structures through seismic isolation. Application of seismic-isolation techniques to nuclear power facilities is currently being investigated. This paper presents an analysis of the effect of long period motions on a seismic-isolated nuclear structure. Preliminary analysis indicates that long-period earthquake motions increase structural accelerations and relative displacements between the upper and lower mats. Relative displacement between the mats can be represented by spectral displacement at the frequency of the structure, and can be effectively reduced by increasing viscous damping in the isolator. The isolated structure behaves as a system with one degree of freedom. Future analysis of seismic effects on seismic-isolated structures should include the linear and nonlinear effects of soil-structure interactions. 3 refs., 12 figs., 3 tabs.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5649313
• Report Number(s): ANL/CP-72765; CONF-910817-22; ON: DE91015673
• Resource Relation: Conference: 11. international conference on structural mechanics in reactor technology, Tokyo (Japan), 18-23 Aug 1991
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
58 GEOSCIENCES
NUCLEAR POWER PLANTS
SEISMIC EFFECTS
SEISMIC ISOLATION
SEISMIC WAVES
DAMPING
DEFORMATION
DESIGN
DYNAMIC LOADS
MATHEMATICAL MODELS
MITIGATION
NONLINEAR PROBLEMS
REACTOR SAFETY EXPERIMENTS
S CODES
SAFETY ENGINEERING
SHOCK ABSORBERS
SHOCK WAVES
COMPUTER CODES
ENGINEERING
NUCLEAR FACILITIES
POWER PLANTS
THERMAL POWER PLANTS
220900* - Nuclear Reactor Technology- Reactor Safety
580000 - Geosciences