Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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An Evaluation of Blast Resistance of Partially Reinforced CFT Columns using Computational Analysis

전산해석을 이용한 부분 보강된 CFT 기둥의 폭발저항성능 평가

  • Kim, Han-Soo (Division of Architecture, Konkuk Univ.) ;
  • Wee, Hae-Hwan (Department of Architectural Engineering, Graduate School, Konkuk Univ.)
  • 김한수 (건국대학교 건축학부) ;
  • 위해환 (건국대학교 대학원 건축공학과)
  • Received : 2015.05.11
  • Accepted : 2015.07.03
  • Published : 2015.10.30
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Abstract

In this paper, the blast resisting performance of partially reinforced CFT columns was compared with the normal CFT columns to evaluate the effect of reinforcing with steel plates. Autodyn which is a specialized hydro-code for analysis of explosion and impact was used to simulate the structural behavior of the CFT columns under the blast loadings. The interaction between concrete and surrounding steel plates was modeled with friction and join option to represent the realistic damage of columns. According to the analysis, the partially reinforced CFT column showed enhanced blast resisting performance than the normal CFT columns. Also the improvement of blast resisting performance was depended on the height of reinforcing steel plates.

본 논문에서는 부분 보강된 CFT 기둥의 폭발저항성능을 일반 CFT 기둥과 비교하여 강판 보강의 효과를 확인하였다. 폭발하중을 받는 CFT 기둥의 구조해석에는 폭발과 충돌 해석을 위한 특수한 하이드로코드인 Autodyn을 사용하여 수치해석을 수행하였다. 콘크리트와 이를 둘러싸고 있는 강판 사이의 상호작용을 모델링하는 여러 방법이 있다. 본 연구에서는 기둥의 실제 파괴를 표현하기 위해 마찰 옵션 및 조인 옵션으로 모델링하였다. 해석에 따르면, 부분 보강된 CFT 기둥은 일반 CFT 기둥에 비해 더 나은 폭발저항효과를 나타내었다. 보강 CFT 기둥의 폭발저항성능은 콘크리트를 둘러싸고 있는 부분 보강된 강판의 높이가 높을수록 향상되었으며 CFT 기둥의 단면 크기 이상으로 보강할 것을 추천한다.

Keywords

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