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Structural Engineering and Mechanics
  Volume 55, Number 1, July10 2015, pages 205-228

A parametric investigation on the hysteretic behaviour of CFT column to steel beam connections
R. Esfandyary, M.S. Razzaghi and A. Eslami

    The results of a numerical investigation pertaining to the hysteretic behaviour of concrete filled steel tubular (CFT) column to I-beam connections are discussed in detail. Following the verification of the numerical results against the available experimental tests, the nonlinear finite element (FE) analysis was implemented to evaluate the effects of different parameters including the column axial load, beam lateral support, shape and arrangement of stiffeners, stiffness of T-stiffeners, and the number of shear stiffeners. Pursuing this objective, an external CFT column to beam connection, tested previously, was selected as the case-study. The lateral forces on the structure were simulated, albeit approximately, using an incremental cyclic loading reversal applied at the beam tip. The results were compared in terms of hysteretic load-displacement curves, stress distributions in connection, strength, rotation, and energy dissipation capacity. It was shown that external T-stiffeners combined with internal shear stiffeners play an important role in the hysteretic performance of CFT columns to I-beam connections.
Key Words
    CFT columns; steel I-beam; column to beam connections; seismic performance; hysteretic behaviour; cyclic loading
R. Esfandyary: Department of Civil Engineering, Azad University, South Tehran Branch, Tehran, Iran
M.S. Razzaghi: Department of Civil Engineering, Azad University, Qazvin Branch, Qazvin, Iran
A. Eslami: School of Civil Engineering, The University of Queensland, Australia

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