Techno Press

Steel and Composite Structures   Volume 23, Number 1, January20 2017, pages 115-130
Anchored blind bolted composite connection to a concrete filled steel tubular column
Hossein Agheshlui, Helen Goldsworthy, Emad Gad and Olivia Mirza

Abstract     [Full Text]
    A new type of moment-resisting bolted connection was developed for use in composite steel- concrete construction to connect composite open section steel beams to concrete filled steel square tubular columns. The connection was made possible using anchored blind bolts along with two through bolts. It was designed to act compositely with the in-situ reinforced concrete slab to achieve an enhanced stiffness and strength. The developed connection was incorporated in the design of a medium rise (five storey) commercial building which was located in low to medium seismicity regions. The lateral load resisting system for the design building consisted of moment resisting frames in two directions. A major full scale test on a sub-assembly of a perimeter moment-resisting frame of the model building was conducted to study the system behaviour incorporating the proposed connection. The behaviour of the proposed connection and its interaction with the floor slab under cyclic loading representing the earthquake events with return periods of 500 years and 2500 years was investigated. The proposed connection was categorized as semi rigid for unbraced frames based on the classification method presented in Eurocode 3. Furthermore, the proposed connection, composite with the floor slab, successfully provided adequate lateral load resistance for the model building.
Key Words
    Ajax anchored blind bolts; concrete filled steel hollow sections; composite steel-concrete connections; T-stub connections; moment-rotation behaviour; reinforced concrete slab on metal decking
(1) Hossein Agheshlui, Helen Goldsworthy:
Department of Infrastructure Engineering, The University of Melbourne, Vic 3010, Australia;
(2) Emad Gad:
Faculty of Engineering & Industrial Sciences, Swinburne University of Tech., Vic 3122, Australia;
(3) Olivia Mirza:
School of Computing, Engineering & Mathematics, University ofWestern Sydney, NSW, 2751, Australia.

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