Hysteretic Behavior of Concrete-Filled Steel Tubular Columns under Uniform Bending


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Hysteretic Behavior of Concrete-Filled Steel Tubular Columns under Uniform Bending

Author(s): H. Nakahara and K. Sakino

Publication: Special Publication

Volume: 238


Appears on pages(s): 289-304

Keywords: confined concrete; cyclic loading; stress-strain relations

Date: 10/1/2006

In order to evaluate the load carrying capacity and ductility of hinging zone ofthe concrete filled steel tubular (CFT) columns, tests are carried out on 12 circular speci-mens and 18 square specimens subjected to uniform bending under a constant axial load.The experimental parameters are: 1) depth to thickness ratio (D/t ratio) and width to thick-ness ratio (B/t ratio) of steel tube; 2) axial load ratio; 3) material strength; 4) deformationhistory and 5) annealing. One of the features of the test is the wide range of D/t and B/tratio. The range of D/t ratio of the circular CFT columns are 40.5-160 and the range of B/t ratio of the square CFT columns are 32.8-98.0, respectively. The experimental load-de-formation relations are compared with those of the elasto-plastic analysis based on theproposed stress-strain relationships established for the filled concrete and for the steel tube.The analytical results show good agreement with the test results for all specimens. Thisimplies that the proposed stress-strain relationships for CFT columns are useful to predictthe characteristics of the filled concrete and the steel tube.