Abstract
This paper investigated the stiffness and capacity of concrete filled double skin tubes (CFDST) column under axial compression. The column has circular hollow section (CHS) as both outer skin and inner skin. Stiffness of CFDST columns under small displacement was analyzed by the energy method. The modified elastic modulus of the between concrete and steel tubes were deduced respectively to calculate the composite stiffness of the CFDST stub column. According to the unified theory of concrete filled steel tube (CFST), the bearing capacity of the stub column was predicted by presenting the equivalent confinement coefficient of CFDST. The composite modulus and ultimate strength of the stub columns were calculated in comparison with corresponding test value, and it was found that there was good agreement between theoretical and experimental results.
| Original language | English |
|---|---|
| Pages (from-to) | 283-291 |
| Number of pages | 9 |
| Journal | International Journal of Mechanics and Materials in Design |
| Volume | 6 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Sept 2010 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering
Keywords
- Concrete-filled
- Double skin tubes
- Stiffness
- Strength
- Theorem of stationary value of potential energy
- Unified theory of CFST