Abstract
본 연구는 압축가새의 변형을 FLD부분에 집중시켜 압축가새의 좌굴안정성을 확보하는 슬릿형 FLD에 관한 것이다. 4개 및 8개의 슬릿형 실험체를 슬릿길이 별로 단순압축실험하였다. 그 결과를 유한요소해석과 비교 검토하여 해석의 유효성을 입증하였다. 또한 전단면을 구성하는 단위요소를 이상화된 샌드위치 단면으로 치환하여, 슬릿개수와 슬릿길이를 변수로 하는 압축력과 축방향 변형의 관계식을 유도하였다. 이 식은 주어진 범위 내에서 실험결과와 좋은 대응을 보인다. 본 연구는 FLD설계의 기본데이터로써 이용 될 수 있다. This research is about design of slit type FLD which secure the buckling stability of compressive brace. 4 slit type and 8 slit type specimens were experimented by pure compressive loading. Comparing the experiment results with FEA results, the good correspondence is appeared each other. Also for deriving strength-displacement formular, an unit section of slit type FLD is transferred to idealized sandwich section. This formular explains satisfactorily experiment results, in given condition. The result of this research will be used as basic data in FLD design.
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