doi:10.3850/978-981-08-9247-0_rp061-icsas11

ABSTRACT

Partially encased composite column (PEC) consists of thin walled welded H-shaped steel section with transverse links provided at regular intervals between the flanges. The space between the flanges and the web plate are filled up with concrete. The transverse links are provided to inhibit the occurrence of local buckling in the thin flange plates. Most of the structural analysis and design software do not handle such composite members due to the complex behaviour at the interface of the two dissimilar materials. In this paper an attempt has been made to simulate the behaviour of this steel concrete composite section using an equivalent steel section which can easily be incorporated in the design and analysis software. Finite element analysis is conducted using the equivalent steel section of partially encased composite columns tested under concentric gravity loading. The reference test columns are obtained from the literature, encompassing a variety of geometric and material properties. The axial capacity obtained from the finite element simulation is compared with that obtained from the experiments for the reference test columns. The finite element simulations of the composite columns with equivalent steel sections are found to predict the experimental behaviour of partially encased composite columns with very good accuracy.

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