NUMERICAL PARAMETRIC ANALYSIS OF AXIALLY COMPRESSED CIRCULAR STEEL TUBE CONFINED CONCRETE COLUMNS
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Abstract
Axially compressed circular steel tube confined concrete columns have been parametrically analyzed through numerical simulation with the general aim to confirm the effectiveness of concrete confinement and quantitatively estimate it. Numerical models have been assembled using SIMULIA Abaqus finite element analysis commercial software and its relevant tools, in particular Abaqus/Explicit module, the general contact algorithm, and the concrete damaged plasticity model. The limit states of the first group and corresponding failure mechanisms have been defined for the considered columns and investigated, qualitatively and quantitatively, with regard to their dependence onto column structural scheme, steel tube thickness and concrete grade. Totally, 33 different cases have been simulated and analyzed.
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