유공 강구조 부재의 반복 국부좌굴거동

초록

Many studies have been performed to describe the elastic and inelastic behavior of H-shaped beams with webopenings that generaly concentrated on the monotonic loading condition and concentric web opening. The findings ofthe studies led Darwin to propose formulas for the design of beams with web openings considering local buckling. While the formulas are simple and useful in real situation, more studies are need on their cyclic loading condition. In this experimental study, 12 H-shaped beams with web openings under cyclic loading condition were investigated. The dimension criteria based on the formulas proposed by Darwin were examined. The suitability of existing design formulas and the effects of plastic hinges on beams with web openings and of local buckling around web openings on the beam strength under cyclic loading were also studied. This was done by observing their behavior with various dimensional openings, eccentric per cent, stifeners.

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