반복하중을 받는 십자형 수직 다이어프램 콘크리트 각형강관(CFT) 기둥-H형보 모멘트접합부 구조거동에 관한 실험적 연구

초록

Conventional internal diaphragm joints provide a reliable path for load transfer from beam to column, but require excessive welding inside column tube. Similarly, external diaphragm may still not be practical due to large volume of steel consumption. To overcome these issues, the present study proposed a new easy-to-fabricate moment connection between H-shaped steel beams and concrete filled tubular (CFT) columns. The connection consists of a vertical plates passing through the aligned slots made on column wall, and end plate welded to H-steel beam, resulting in various advantages from the fabrication and structural points. Four full-scale exterior beam-column connections are design for cyclic loading tests as per KDS 41 31 10 and AISI/AISC 341-16 seismic design provisions. The ductility, moment-rotation hysteretic performance, initial stiffness, energy dissipation capacity are examined based on the laboratory test results. It shows that all specimens failed in plastic hinge on Hsteel beam. The proposed connection exhibit stable hysteretic curves up to 3 % story drift without damage in the column, which satisfy the KDS 41 31 10 and AISI/AISC 341-16 design provisions as a intermediate moment connection.

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