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Evaluation of seismic acceleration responses of base-isolated and nonisolated structures varying with mechanical characteristics of foundations

Abstract

The evaluation of acceleration responses of isolated and nonisolated structures according to mechanical features of soils is important. The kinds of soils taken in analyses are soft, medium and hard rocks, and a fixed base condition is also taken for the comparison. The horizontal isolation frequency used is 0.5 Hz. The time history analyses of reference power plant using 1940 El Centro horizontal (NS) and vertical earthquakes are performed to investigate the seismic responses varying with soil characteristics for isolated and nonisolated structures. The horizontal acceleration responses of the horizontal isolated-structures show almost similar values irrespective of the various kinds of soils and are largely decreased in the frequency ranges above 2 hz. The vertical natural frequency, 21Hz of high damping rubber bearing does not affect the vertical acceleration responses in case of soft rock, but largely affects in hard rock condition. For nonisolated structures, the acceleration responses are decreased in both horizontal and vertical directions by taking into account the soils in the analysis model. The extent of reduction of acceleration responses is larger in vertical direction than in horizontal one, as the stiffness of rock becomes softer. 8 tabs., 21 figs., 8 refs. (Author) .new.
Authors:
You, Bong; Lee, Jae Han; Ku, Kyung Hoi [1] 
  1. Korea Atomic Energy Research Institute, Daeduk (Korea, Republic of)
Publication Date:
May 01, 1996
Product Type:
Technical Report
Report Number:
KAERI/TR-670/96
Reference Number:
SCA: 210200; PA: AIX-27:063047; EDB-96:126183; NTS-97:001461; SN: 96001653185
Resource Relation:
Other Information: PBD: May 1996
Subject:
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; CONTAINMENT BUILDINGS; SEISMIC ISOLATION; PWR TYPE REACTORS; REACTOR SITES; REACTOR VESSELS; SEISMIC EFFECTS
OSTI ID:
281047
Research Organizations:
Korea Atomic Energy Research Inst., Daeduk (Korea, Republic of)
Country of Origin:
Korea, Republic of
Language:
Korean
Other Identifying Numbers:
Other: ON: DE96634447; TRN: KR9600095063047
Availability:
INIS; OSTI as DE96634447
Submitting Site:
KRN
Size:
74 p.
Announcement Date:

Citation Formats

You, Bong, Lee, Jae Han, and Ku, Kyung Hoi. Evaluation of seismic acceleration responses of base-isolated and nonisolated structures varying with mechanical characteristics of foundations. Korea, Republic of: N. p., 1996. Web.
You, Bong, Lee, Jae Han, & Ku, Kyung Hoi. Evaluation of seismic acceleration responses of base-isolated and nonisolated structures varying with mechanical characteristics of foundations. Korea, Republic of.
You, Bong, Lee, Jae Han, and Ku, Kyung Hoi. 1996. "Evaluation of seismic acceleration responses of base-isolated and nonisolated structures varying with mechanical characteristics of foundations." Korea, Republic of.
@misc{etde_281047,
title = {Evaluation of seismic acceleration responses of base-isolated and nonisolated structures varying with mechanical characteristics of foundations}
author = {You, Bong, Lee, Jae Han, and Ku, Kyung Hoi}
abstractNote = {The evaluation of acceleration responses of isolated and nonisolated structures according to mechanical features of soils is important. The kinds of soils taken in analyses are soft, medium and hard rocks, and a fixed base condition is also taken for the comparison. The horizontal isolation frequency used is 0.5 Hz. The time history analyses of reference power plant using 1940 El Centro horizontal (NS) and vertical earthquakes are performed to investigate the seismic responses varying with soil characteristics for isolated and nonisolated structures. The horizontal acceleration responses of the horizontal isolated-structures show almost similar values irrespective of the various kinds of soils and are largely decreased in the frequency ranges above 2 hz. The vertical natural frequency, 21Hz of high damping rubber bearing does not affect the vertical acceleration responses in case of soft rock, but largely affects in hard rock condition. For nonisolated structures, the acceleration responses are decreased in both horizontal and vertical directions by taking into account the soils in the analysis model. The extent of reduction of acceleration responses is larger in vertical direction than in horizontal one, as the stiffness of rock becomes softer. 8 tabs., 21 figs., 8 refs. (Author) .new.}
place = {Korea, Republic of}
year = {1996}
month = {May}
}