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철근콘크리트 구조물의 직접비탄성 내진설계를 위한 할선강성
Secant Stiffness for Direct Inelastic Earthquake Design of Reinforced Concrete Structures

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Authors
박홍근; 엄태성; 김재요
Issue Date
2009-04
Publisher
한국지진공학회 = Earthquake Engineering Society of Korea
Citation
한국지진공학회 논문집, 13권 2호, 2009, pp. 59-68
Keywords
secant stiffness analysisinelastic analysismoment redistributionseismic designreinforced concrete할선강성해석비탄성해석모멘트재분배내진설계철근콘크리트
Abstract
For safe and economical design to provide strong earthquake resistance, the moment redistribution and plastic
rotation of structures and their members needs to be evaluated. To achieve this, an earthquake design method was developed using
secant stiffness analysis. To address the variation of member stiffness due to plastic rotation and moment redistribution, a structure
was modeled with a beam-column element with non-rigid end connections (NREC element). Secant stiffness for the NREC element
was determined based on the ductility demands of the structure and members. By performing a conventional linear analysis for
the secant stiffness model, redistributed moments and plastic rotations of the members were computed. The proposed method was
applied to a moment frame and two dual systems. The design results were verified using detailed nonlinear analyses. ; 안전하고 경제적인 내진설계를 위해서는 설계 초기단계부터 모멘트재분배와 부재소성변형을 고려하는 것이 바람직하다. 본 연구에서는 할선강성해석을 사용하여 각 부재의 재분배된 모멘트와 소성변형을 직접적으로 고려할 수 있는 내진설계방법을 개발하였다. 모멘트재분배에 의하여 발생된 비대칭 부재강성을 나타내기 위하여, 비강접 단부접합부를 갖는 보-기둥요소(NREC 요소)를 사용하여 구조물을 모델링하였다. NREC요소에 사용되는 할선강성은 건물 및 부재의 요구연성도에 기반하여 결정하였다. 할선강성 구조모델에 대한 선형해석을 수행하여 내진설계를 위한 부재력과 소성변형을 구하였다. 본 연구에서는 할선강성해석을 모멘트골조와 이중골조의 내진설계에 적용하였고 설계결과를 정밀한 비선형해석 결과와 비교하였다.
ISSN
1226-525X
Language
Korean
URI
http://uci.or.kr/G300-jX1178240.v13n2p59

http://hdl.handle.net/10371/8135
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Architecture and Architectural Engineering (건축학과)Journal Papers (저널논문_건축학과)
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