Bending Characteristics of Concrete Filled Double Steel Tubular Members
By Kojiro Uenaka, Hiroaki Kitoh and Ryota Gotoh
Concrete Research and Technology
Vol.17, No.3, Sep. 2006 (Issue 42)
- Synopsis:
- Concrete filled double steel tubular members(CFDT) consists of two centric steel tubes and filled concrete between them. By the arrangement of the inner tube, own weight can be reduced in comparison with concrete filled steel tubular members. Four point loading test on twelve specimens of CFDT were performed. Experimental parameters are inner-to-outer diameter ratios and outer tube�fs diameter-to-thickness ratios. The purpose of this study is to investigate effect of inner-to-outer diameter ratios on bending capacities. Experimental strength were good agreement with bending strength calculated using axial load(N)-bending moment(M) relation, where N was equal to zero. Failure mode were local buckling and fracture of outer tube. The larger inner-to-outer tube�fs diameter ratios, yield the smaller confinement strength.
- Keywords:
- Composite columns, Concrete filled double steel tubular members, Concrete filled steel tubular members, Bending moment capacities, Confinement stress
