Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Seismic Performance Evaluation of Lead Rubber Bearings Using Real-e Hybrid Simulation

납-고무받침(LRB)의 내진성능평가를 위한 실시간 하이브리드 실험

  • Park, Jamin (Department of Civil and Environmental Engineering, Myongji University) ;
  • Park, Minseok (Hystec, Myongji University) ;
  • Chae, Yunbyeong (Department of Civil and Environmental Engineering, Institute of Construction and Environmental Engineering, Seoul National University) ;
  • Kim, Chul-Young (Department of Civil and Environmental Engineering, Myongji University)
  • 박자민 (명지대학교 토목환경공학과) ;
  • 박민석 (명지대학교 하이브리드 구조실험센터) ;
  • 채윤병 (서울대학교 건설환경공학부, 서울대학교 건설환경종합연구소) ;
  • 김철영 (명지대학교 토목환경공학과)
  • Received : 2024.11.14
  • Accepted : 2024.12.10
  • Published : 2025.01.01
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Abstract

The seismic performance of lead-rubber bearings (LRBs) is significantly affected by both the axial force and loading rate they experience. Accurate assessment of LRBs' seismic performance, therefore, requires realistic simulation of these forces and rates, as well as of the response of the isolated structure during seismic events. This study conducted a series of real-time hybrid simulations (RTHS) to evaluate the seismic behavior of LRBs in such conditions. The simulations focused on a two-span continuous bridge isolated by LRBs atop the central pier, exposed to horizontal and vertical ground motions. In the RTHS framework, the LRBs were physically tested in the laboratory, while the remainder of the bridge was numerically modeled. Findings from these simulations indicated that the vertical ground motion had a minimal effect on the lateral response of the bridge when isolated by LRBs.

Keywords

Acknowledgement

본 연구는 과학기술정보통신부 이공분야기초연구사업/중견연구자지원사업(과제번호 2022R1A2C2012494)의 지원에 의해 수행되었음.

References

  1. Han X. Warn GP. Mechanistic model for simulating critical behavior in elastomeric bearings, ASCE J Struct Eng. 2015;141(5):1-12.
  2. Weisman J. Warn GP. Stability of elastomeric and lead-rubber seismic isolation bearings. ASCE J Struct Eng. 2012;138(2):215-223. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000459
  3. Ryan KL, Kelly JM, Chopra AK. Nonlinear model for lead-rubber bearings including axial-load effects. ASCE J Eng Mech. 2005;131(12):1270-1278. https://doi.org/10.1061/(ASCE)0733-9399(2005)131:12(1270)
  4. Aiken ID, Kelly JM, Tajirian FF. Mechanics of low shape factor elastomeric seismic isolation bearings. Rep. NO. UCB/EERC-89/13. Earthquake Engineering Research Center. Univ. of California, Berkeley, Calif; c 1989.
  5. Griffith MC, Kelly JM, Coveney VA, Koh CG. Experimental evaluation of medium-rise structures subject to uplift. Rep. No. UCB/EER C-88/02. Earthquake Engineering Research Center. Univ. of California, Berkeley, Calif; c 1988.
  6. Kelly JM, Chan IGB, Koh CG. Mechanical characteristics of base isolation bearings for a bridge deck model test. Rep. No. UCB/EERC-86/11. Earthquake Engineering Research Center. Univ. of California, Berkeley, Calif;c 1987.
  7. Tyler RG, Robinson WH. High-strain tests on lead-rubber bearings for earthquake loadings. Bull N Z Soc Earthq Eng. 1984;17(2):90-105.
  8. Pourmasoud M. Hajirasouliha I. Park A, Lim JBP. A new approach to estimate the lead core characteristic strength of lead rubber bearings. Eng Struct. 2022;270(1):1-12.
  9. Chae Y, Lee J. Park M, Kim CY. Fast and slow cyclic tests for reinforced concrete columns with an improved axial force control. J Struct Eng. 2019;145(6):1-12. https://doi.org/10.1061/(ASCE)ST.1943-541X.0002334
  10. Chae Y, Kazemibidokhti K. Ricles JM. Adaptive time series compensator for delay compensation of servo-hydraulic actuator systems for real-time hybrid simulation, Earthq Eng Struct Dyn. 2013;42(11):1697-1715. https://doi.org/10.1002/eqe.2294
  11. Chae Y. Lee J, Park M. Kim CY. Real-time hybrid simulation for an RC bridge pier subjected to both horizontal and vertical ground motions. Earthq Eng Struct Dyn. 2018a;47(7):1673-1679. https://doi.org/10.1002/eqe.3042
  12. Chae Y. Rabiee R, Dursun A. Kim CY. Real-time force control for servo-hydraulic actuator systems using adaptive time series compensator and compliance springs, Earthq Eng Struct Dyn. 2018b;47(4):854-871. https://doi.org/10.1002/eqe.2994
  13. Cho CB, Chae Y, Park M. Improved real-time force control for applying axial force to axially stiff members. Earthq Eng Struct Dyn. 2023;53(1):331-347. https://doi.org/10.1002/eqe.4024