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수직다이아프램을 사용한 충전형 각형강관기둥 접합부의 내력평가

수직다이아프램을 사용한 충전형 각형강관기둥 접합부의 내력평가 

한국강구조학회 논문집 제29권 제3호 (통권 제 148호) 2017년 6월

저자: 김경태 ・ 이헌우 ・ 김영기 ・ 김태진 ・ 김종호


This paper investigates structural characteristics of internal vertical diaphragm and its influence on the connection strength between concrete filled tubular(CFT) column and beam. CFT columns are hybrids that combine two materials in one member. They have the benefits of steel for high tensile strength and ductility and of concrete for high compressive strength and stiffness. Analytical method of the flexural strength of vertical diaphragm to account moment transfer between panel zones is presented using yield line theory. Connection design is verified by a set of monotonic tests and numerical analysis with different diaphragm thicknesses. Plastic zones of CFT flange was found and matched closely to FEM results. Both analytical and experimental results showed good agreement that vertical diaphragm effectively alleviates the stress and transfer the force.

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