Seismic Fragility Assessment Method for RC Bridges in Korea using a Representative Bridge

HyoJoon An; Seong-Hoon Jeong; Soobong Shin

doi:10.7734/COSEIK.2019.32.6.417

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2019 Vol.32, Issue 6 Preview Page Next Page

Research Paper

Seismic Fragility Assessment Method for RC Bridges in Korea using a Representative Bridge 대표 교량을 이용한 국내 철근콘크리트 교량의 지진취약성 분석 방법

31 December 2019. pp. 417-423

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Abstract

In this investigation, a set of seismic fragility curves for RC bridges in Korea is derived by considering variations of the representative analytical model. The dimensions and specifications of the model are determined, based on statistical analysis of the inventory of RC bridges in Korea. Variations of important modeling parameters such as material properties, size of structural members, and dimension of the bridge are defined based on statistical studies of the bridges. The OpenSees program is utilized for the analysis to represent the inelastic behavior of RC members. A systematic approach is developed to perform a large volume of inelastic dynamic analysis, in which continuous variation of the modeling parameters are programmed to appropriately represent the characteristics of RC bridges in Korea

Keywords

seismic fragility curves

RC bridges

representative analytical model

inelastic behavior

본 논문에서는 OpenSees 프로그램을 이용한 콘크리트 교량의 지진취약성 분석 방법에 대한 고찰을 제시한다. 교각 및 휨 부재 분산 비선형(distributed plasticity) 요소를 적용한 해석모델을 활용하여 지진에 대한 응답을 구하고 이를 통계적으로 처리하여 확률론적 지진취약성 분석을 수행한다. 응답 통계는 세기가 같은 지진파의 집단을 단계별로 scaling하는 stripe 방 법과 다양한 세기를 가진 지진파 집단을 선정하는 cloud방법을 적용하고 이 두 방법에 의한 분석결과의 차이를 비교한다. 한계 상태에는 교각의 휨변형과 교좌장치의 변위를 기준으로 산정한 다단계 한계상태를 적용하고, 여러 가지 한계상태를 취합한 시스템 취약성을 도출한다. 지진응답의 통계적 처리 방법과 교량의 손상 정의가 지진취약성 곡선에 주는 영향을 고찰한다.

키워드

지진취약성

콘크리트 교량

OpenSees

분산 비선형

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 32
No :6
Pages :417-423
Received Date : 2019-11-07
Revised Date : 2019-11-13
Accepted Date : 2019-11-14
DOI :https://doi.org/10.7734/COSEIK.2019.32.6.417

Journal of the Computational Structural Engineering Institute of Korea 한국전산구조공학회 논문집 ISSN:1229-3059(Print) 2287-2302(Online)

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