Earthquake risk assessment of seismically isolated extradosed bridges with lead rubber bearings SCIE SCOPUS KCI

Cited 9 time in WEB OF SCIENCE Cited 11 time in Scopus
Title
Earthquake risk assessment of seismically isolated extradosed bridges with lead rubber bearings
Author(s)
Kim, Dookie; Yi, Jin-Hak; Seo, Hyeong-Yeol; Chang, Chunho
KIOST Author(s)
Yi, Jin Hak(이진학)
Publication Year
2008-08-20
Abstract
This study presents a method to evaluate the seismic risk of an extradosed bridge with seismic isolators of lead rubber bearings (LRBs), and also to show the effectiveness of the LRB isolators on the extradosed bridge, which is one of the relatively flexible and lightly damped structures in terms of seismic risk. Initially, the seismic vulnerability of a structure is evaluated, and then the seismic hazard of a specific site is rated using an earthquake data set and seismic hazard maps in Korea. Then, the seismic risk of the structure is assessed. The nonlinear seismic analyses are carried out to consider plastic deformation of bridge columns and the nonlinear characteristics of soil foundation. To describe the nonlinear behaviour of a column, the ductility demand is adopted, and the moment-curvature relation of a column is assumed to be bilinear hysteretic. The fragility curves are represented as a log-normal distribution function for column damage, movement of superstructure, and cable yielding. And the seismic hazard at a specific site is estimated using the available seismic hazard maps. The results show that in seismically-isolated extradosed bridges under earthquakes, the effectiveness of the isolators is much more noticeable in the columns than the cables and girders.
ISSN
1225-4568
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4461
DOI
10.12989/sem.2008.29.6.689
Bibliographic Citation
STRUCTURAL ENGINEERING AND MECHANICS, v.29, no.6, pp.689 - 707, 2008
Publisher
TECHNO-PRESS
Subject
FRAGILITY CURVES; PERFORMANCE
Keywords
seismic fragility; seismic hazard; seismic risk; LRB seismic isolator; extradosed bridge
Type
Article
Language
English
Document Type
Article
Publisher
TECHNO-PRESS
Related Researcher
Research Interests

Ocean Energy-Tidal Current Energy Converter System,Infrastructure Management-Structural Health Monitoring,Offshore Wind,해양에너지-조류발전시스템,시설물 유지관리-구조건전성 평가,해상풍력

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