Browse > Article
http://dx.doi.org/10.5000/EESK.2016.20.5.319

Seismic Responses of Seismically Isolated Nuclear Power Plant Structure Considering Post-Yield Stiffness of EQS Bearing  

Kim, Byeong-Su (Department of Civil Engineering, Kangwon National University)
Song, Jong-Keol (Department of Civil Engineering, Kangwon National University)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.20, no.5, 2016 , pp. 319-329 More about this Journal
Abstract
The Eradi Quake System (EQS) is a seismic isolation bearing system designed to minimize forces and displacements experienced by structures subjected to ground motion. The EQS dissipates seismic energy through friction of Poly Tetra Fluoro Ethylene (PTFE) disk pad. In general, a force-displacement relationship of EQS has post yield stiffness hardening during large inelastic displacement. In this study, seismic responses of seismically isolated nuclear power plant (NPP) subjected to design basis earthquake (DBE) and beyond design basis earthquakes (150% DBE and 167% DBE) are compared considering the post yield stiffness hardening effect of EQS. From the results, it can be observed that if the post-yield stiffness hardening effect of EQS is increased, the displacement response of EQS is reduced, and the acceleration and shear responses of containment structures of NPP is increased.
Keywords
Eradi Quake System (EQS); Seismic isolation; Post-yield stiffness hardening; Design basis earthquake; Beyond design basis earthquake;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Park HG, Lee YI, Jung DY. Experimental and Analytical Study of the Dynamic Behavior of a Polyurethane Spring Restoring Disk Bearing, Journal of Earthquake Engineering Society of Korea. 2011;15(2): 61-69.   DOI
2 Yu SM, Lee YI, Ji YS, Choi DS, Kim DK. A Study on the Application of EQS bearings for the Seismic Isolation of Building Structures by ICT Case study, Journal of Earthquake Engineering Society of Korea. 2013;17(2): 61-70.   DOI
3 Federal Emergency Management Agency, NEHRP Commentary on the Guidelines for the Seismic Rehabilitation of Buildings(FEMA 274) Ch. 9. Seismic Isolation and Energy Dissipation. c1997.
4 Lysmer J, Ostadan F, Chin CC. A system for analysis of soil-structure interaction. SASSI 2000 theoretical manual. UC Berkeley. c1999.
5 Mazzoni S, McKenna F, Scott MH, Fenves GL. OpenSees: Open System of Earthquake Engineering Simulation, Pacific Earthquake Engineering Center, Univ. of Calif., Berkeley. (http://opensees.berkeley.edu), c2007.
6 Hancock J, Watson-Lamprey J, Abrahamson NA, Bommer JJ, Markatis A, McCoy E, Mendis R. An improved method of matching response spectra of recorded earthquake ground motion using wavelets. Journal of Earthquake Engineering. 2006;10(S1): 67-89.
7 U.S. Atomic Energy Commision. Regulatory Guide 1.60. Design response spectra for seismic design of nuclear power plants. c1973.
8 Seok CG. Seismic Response Evaluation of NPP Containment Structures According to Model Characteristics of The Isolation System, Master's thesis Kangwon University. c2015.
9 Lee YI, Lee YJ, Lee HP, Cho MS, Jee YS, Beak JH. Study on the Performance Improvement of an EQS Device Applied Nuclear Power Plant. Journal of Earthquake Engineering Society of Korea. 2015;19(1): 13-19.   DOI
10 Jung DY. Dynamic and Long-term Behavior Characteristics of Sliding Isolation Disk Bearing with Polyurethane and PTFE. Doctor's thesis Incheon University. c2011.
11 U.S. Nuclear Regulatory Commission. Technical Considerations for Seismic Isolation of Nuclear Facilities(Draft). c2012.
12 ASCE, forthcoming. ASCE/SEI 4-16. Seismic analysis of safety-related nuclear structures. Structural Engineering Institute of the American Society of Civil Engineers, Reston, VA.
13 Oh J, Park KN, Kim HO, Yang YS. Compressive Horizontal Load Dependent Characterization Test of Isolation Disk Bearing. Journal of Korean Society of Civil Engineers. 2009: 2299-2302.
14 Oh J, Park KN, Lim TG, Jung HY. An Experimental Study on the Characteristics of Bridge Bearing Using Polyurethane. Journal of Earthquake Engineering Society of Korea. 2008;03:134-141.
15 Kang TW, Ji YS, Bang IS. The Method of Optimal Stiffness Design for Eradi-Quake System(EQS). Journal of Korean Society of Civil Engineers. 2009: 286-289.
16 Shim HH, Kwon OK. Friction and Wear Characteristics of PTFEPolyimide Composite. Journal of Korean Society of Tribologists and Lubrication Engineers. 1995;11(4): 28-34.