Local response of W-shaped steel columns under blast loading

TLDR

Local failure of steel columns under direct blast can trigger partial or full building collapse. The paper aims to develop a state‑of‑the‑art analytical approach using CFD to mitigate blast‑induced hazards in steel frame structures. The authors evaluate the approach on a wide‑flange steel column and perform parametric studies on section size and boundary conditions to assess column behavior and failure. The approach accurately captures blast‑column interactions and effectively predicts column failure behavior.

Abstract

Local failure of a primary structural component induced by direct air-blast loading may be itself a critical damage and lead to the partial or full collapse of the building. As an extensive research to mitigate blast-induced hazards in steel frame structure, a state-of-art analytical approach or high-fidelity computational nonlinear continuum modeling using computational fluid dynamics was described in this paper. The capability of the approach to produce reasonable blast pressures on a steel wide-flange section column was first evaluated. Parametric studies were conducted to observe the effects of section sizes and boundary conditions on behavior and failure of columns in steel frame structures. This study shows that the analytical approach is reasonable and effective to understand the nature of blast wave and complex interaction between blast loading and steel column behavior.