Experimental Research and Finite Element Analysis on Seismic Behavior of Concrete filled Square Steel Tubular Columns

Abstract:

Six full scaled concrete filled square steel tubular (CFSST) columns were tested under low cyclic loading to test their seismic behavior; and then, numerical simulation was made by Abaqus, the finite element analysis results agree well with the experimental results. Results show that CFSST has good plastic deformation capacity. The energy dissipation capacity of CFSST increases with the increasing of sectional steel ratio; the horizontal bearing capacity of CFSST increases with the increasing of axial compression ratio, while the rigidity and energy dissipation capacity reduce instead; and the horizontal bearing capacity, rigidity and energy dissipation capacity of CFSST decrease with the increase of slenderness ratio.

Key words:concrete filled square steel tubular; anti seismic behavior; low cyclic load; plastic deformation capacity; energy dissipation capacity