The Finite Element Analysis for Concrete Filled Steel Columns under Blast Load
To investigate their adequacy as energy dissipating elements during earthquakes, this paper reports on cyclic inelastic tests executed to determine the maximum strength and ductility of four concrete-filled circular steel piers joined to a foundation detail proposed to develop the full composite strength at the base of these columns. Column diameters considered were 324 and 406 mm, with D/t ratios ranging from 34 to 64. The ductility of all tested columns was found to be good, all columns being able to reach drifts of 7% before a significant loss in moment capacity occurred as a result of cracks opening on the local buckles, suggesting that concrete-filled steel tubes can be effective as bridge piers in seismic regions of North America. DOI: 10.1061/~ASCE!1084-0702~2004!9:1~14! CE Database subject headings: Bridge piers; Composite columns; Cyclic tests; Seismic response; Footings; Design criteria.