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Seismic Performance Evaluation of Special Moment Steel Frames with Torsional Irregularities - I Seismic Design

비틀림 비정형을 갖는 철골특수모멘트골조의 내진성능평가 - I 내진설계

  • Han, Sang Whan (Dept. of Architectural Engineering, Hanyang University) ;
  • Kim, Tae O (Dept. of Architectural Engineering, Hanyang University) ;
  • Ha, Seong Jin (Dept. of Architectural Engineering, Korea National University of Transportation)
  • 한상환 (한양대학교, 건축공학과) ;
  • 김태오 (한양대학교, 건축공학과) ;
  • 하성진 (한국교통대학교, 건축공학과)
  • Received : 2017.03.13
  • Accepted : 2017.08.31
  • Published : 2017.10.27

Abstract

ASCE 7-10 defines the torsional irregular structure as the one that has large torsional responses caused by the eccentricity. The code requires that these structures should be designed abide by the torsional provisions. This study evaluates the influence of torsional provisions on the performance of the designed multiple steel moment frames with different eccentricity. In this study, 3D response history analyses are performed. The results show that the moment frame design according to the standard with torsional irregularity provisions showed larger performance as the eccentricity increased and the distribution of plastic hinges similarly to orthopedic structures.

지진하중 하에서 구조물의 강성중심과 질량중심이 차이가 날 경우에 편심이 발생하여 비틀림을 유발한다. ASCE 7-10에서는 이를 비틀림 비정형으로 규정하고 있으며, 비틀림 비정형 구조물의 내진설계를 위한 요구사항들을 제시하고 있다. 본 연구에서는 편심이 다른 3층, 9층 철골 모멘트 골조의 3차원 시간이력해석 결과를 기반으로 비틀림 비정형 철골조에 적용되는 내진설계기준의 요구조건에 대한 영향을 평가하였다. 그 결과, 편심이 증가할수록 적절히 설계된 구조물의 성능이 우수하며 소성힌지의 분포가 정형 구조물과 유사한 것으로 나타냈다.

Keywords

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