Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
권호 표지
DOI QR코드

DOI QR Code

Evaluation of Seismic Response Considering the Ageing Effect of Rubber and Lead-Rubber Bearings Applied to PSC Box Bridge

PSC-Box 교량에 적용된 탄성고무 받침과 납-고무 받침의 노후화 효과를 고려한 지진응답의 평가

  • Jeong, Yeon Hui (Department of Civil Engineering, Kangwon National University) ;
  • Song, Jong-Keol (Department of Civil Engineering, Kangwon National University) ;
  • Shin, Soobong (Department of Civil Engineering, Inha University)
  • 정연희 (강원대학교 건축.토목.환경공학부 토목공학과) ;
  • 송종걸 (강원대학교 건축.토목.환경공학부 토목공학과) ;
  • 신수봉 (인하대학교 사회인프라공학과)
  • Received : 2019.08.12
  • Accepted : 2019.10.10
  • Published : 2019.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

The number of aged bridges is increasing so that bridges over 30 years old account for about 11% of all bridges. Consequently, the development of a seismic performance evaluation method that considers the effects of ageing is essential for a seismic retrofitting process for improvement of the seismic safety of existing old bridges. Assessment of the damage situation of bridges after the recent earthquakes in Korea has been limited to the bearings, anchor, and concrete mortar on piers. The purpose of this study is to evaluate the seismic responses of PSC box girder bridges by considering the ageing effect of rubber bearings (RBs) and lead-rubber bearings (LRBs). The modification factor proposed by AASHTO is used to take into account the ageing effect in the bearings. PSC box girder bridges with RBs and LRBs were 3D modeled and analyzed with the OpenSEES program. In order to evaluate the ageing effect of RBs and LRBs, 40 near fault and 40 far field records were used as the input earthquakes. When considering the effect of ageing, the displacement responses and shear forces of bridge bearings (RBs and LRBs) were found to increase mostly under the analytical conditions. It was shown that the effect of ageing is greater in the case of RBs than in the case of LRBs.

Keywords

References

  1. Ministry of Land, Infrastructure and Transport. Yearbook of Road Brdige and Tunnel Statistics. c2018.
  2. American, Guide Specifications for Seismic Isolation Design. American Association of State Highway and Transportation Officials (AASHTO). Washington, D.C. c1999.
  3. Stevenson A, Price R. Case Study of Elastomeric Bridge Bearings After 20 Years of Service. Special Publication. 1986;94: 113-136.
  4. Gu H, Yoshito I. Ageing effects on high damping bridge rubber bearing. Proceedings of the 6th Asia-Pacific Structrural Engineering and Construction Conference. Malaysia. c2006.
  5. Constantinou MC, Tsopelas P, Kasakanati A, Wolff ED, Property modification factors for seismic isolation bearings. Technical Report MCEER-99-0012. Multidisciplinary Center for Earthquake Engineering Research. University at Buffalo. State University of New York. Buffalo. NY. c1999.
  6. Thompson ACT, Whittaker A, Mahin SA. Property Modification Factors for Elastomeric Seismic Isolation Bearings. Proceedings of the 12th World Conference on Earthquake Engineering. Upper Hutt. NZ: New Zealand Society for Earthquake Engineering. c2000.
  7. Mazzoni S, McKenna F, Scott MH, Fenves GL. OpenSees: Open System of Earthquake Engineering Simulation. Pacific Earthquake Engineering Center. Univ. of Calif. Berkeley. 2007. Available from: http://opensees.berkeley.edu.
  8. FEMA. State of the Art Report on Systems Performance of Steel Moment Frames subject to Earthquake Ground Shaking. FEMA 355C. c2000.
  9. Song JK. Evaluation of Inelastic Displacement Ratios for Smooth Hysteretic Behavior Systems. EESK J. Earthquake Eng. 2011 June;15(3):11-26.
  10. Jin HS. Seismic Fragility Analyses of Bridge Structures using Improved Capacity Spectrum Method. Ph. D. Dissertation. Kangwon National University. c2010.