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Steel and Composite Structures
  Volume 32, Number 5, September10 2019 , pages 583-594

Behavior of composite CFST beam-steel column joints
Soon-Sub Eom, Quang-Viet Vu, Ji-Hun Choi, George Papazafeiropoulos and Seung-Eock Kim

    In recent years, composite concrete-filled steel tubular (CFST) members have been widely utilized in framed building structures like beams, columns, and beam-columns since they have significant advantages such as reducing construction time, improving the seismic performance, and possessing high ductility, strength, and energy absorbing capacity. This paper presents a new composite joint - the composite CFST beam-column joint in which the CFST member is used as the beam. The main components of the proposed composite joint are steel H-beams, CFST beams welded with the steel H-column, and a reinforced concrete slab. The steel H-beams and CFST beams are connected with the concrete slab using shear connectors to ensure composite action between them. The structural performance of the proposed composite joint was evaluated through an experimental investigation. A three-dimensional (3D) finite element (FE) model was developed to simulate this composite joint using the ABAQUS/Explicit software, and the accuracy of the FE model was verified with the relevant experimental results. In addition, a number of parametric studies were made to examine the effects of the steel box beam thickness, concrete compressive strength, steel yield strength, and reinforcement ratio in the concrete slab on the proposed joint performance.
Key Words
    concrete-filled steel tubular; composite joints; finite element model; ABAQUS/explicit
(1) Soon-Sub Eom, Quang-Viet Vu, Ji-Hun Choi, Seung-Eock Kim:
Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul, 05006, South Korea;
(2) Quang-Viet Vu:
Faculty of Civil Engineering, Vietnam Maritime University, 484 Lach Tray Street, Ngo Quyen District, Hai Phong city, Vietnam;
(3) George Papazafeiropoulos:
Department of Structural Engineering, National Technical University of Athens, Zografou, Athens 15780, Greece.

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