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접합부 회전능력에 기초한 철골모멘트골조의 반응수정계수 산정법
Rational Evaluation of Seismic Response Modification Factor of Steel Moment Frame Based on Available Connection Rotation Capacity

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Authors
이철호; 송진규; 김건우
Issue Date
2007-04
Publisher
한국지진공학회 = Earthquake Engineering Society of Korea
Citation
한국지진공학회 논문집, 11권 2호, 2007, pp. 11-17
Keywords
반응수정계수철골모멘트 골조RBS 접합부response modification factorsteel moment framesRBS connection
Abstract
현행 내진설계에서 반응수정계수는 탄성 밑면전단력을 저감하여 설계하중 수준을 정의하기 위한 주요 계수로 사용되고 있다. 이제까지 반응수정계수는 공학자들의 경험적인 합의에 의하여 정성적으로 설계기준에 반영하고 있다. 구조시스템에서 반응수정계수와 접합부의 가용 회전능력은 매우 밀접한 관계가 있으며, 본 논문에서는 이러한 접합부의 회전능력과 비선형 푸쉬오버 해석에 기초하여 반응수정계수를 평가하는 방법을 제시하였다. 이를 검증하기 위하여 IBC 2000에 따라 설계된 RBS 골조를 대상으로 제안 방법을 적용하였다. 또한, 다양한 지진파에 대한 비선형 시간이력 해석을 병행하여 가용 회전능력에 의거하여 산정된 반응수정계수의 타당성을 평가한 결과, 본 제안방법에 따라 정의된 반응수정계수가 충분히 보수적임을 확인하였다. ; In current seismic design practice, the response modification factor (R-factor) is used as a key factor to reduce the elastic base shear demand to the design force level. As is well-known, the R-factor is a committee-consensus factor and, as such, highly qualitative and empirical. The relationship between the R-factor and the connection rotation capacity available in a particular structural system has remained a missing link. In this paper, a rational procedure to evaluate the R-factor is proposed. To this end, the relationship between the available connection rotation capacity and the R-factor is defined and quantified using nonlinear pushover analysis. An RBS steel frame designed according to IBC 2000 was used to illustrate and verify the proposed procedure. Nonlinear time history analysis results indicated that the R-factor definition proposed in this study is generally conservative from design perspective.
ISSN
1226-525X
Language
Korean
URI
https://hdl.handle.net/10371/8410
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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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