Abstract
This paper presented experimental study on 12 recycled aggregate concrete filled steel tubular (RACFST) stubs and 12 reinforced recycled aggregate concrete (RRAC) stubs with spiral reinforcement under axial compressive loading. To highlight the beneficial effects of the confinement effects on the mechanical behavior of RACFST specimens, the weight of the steel used in RACFST specimens and their companion RRAC specimens are the same. Influences of the parameters including concrete strength and recycled coarse aggregate (RCA) replacement rates on the ultimate response of axially loaded RACFST stubs and RRAC stubs were discussed. It can be seen that RACFST stubs exhibit better static behavior under axial pressure compared with RRAC stubs. The RACFST stubs fail in shear modes due to the confinement effect coefficient is relative small (ξ<1.0). The effects of RCA replacement rates on ultimate bearing capacity of RACFST specimens are smaller than those on RRAC specimens. The influences of the concrete strength on the axial behavior of the RACFST stubs and RRAC stubs are similar to the corresponding concrete filled steel tubular (CFST) stubs and reinforced concrete (RC) stubs, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 170-177 |
| Number of pages | 8 |
| Journal | Jianzhu Jiegou Xuebao/Journal of Building Structures |
| Volume | 32 |
| Issue number | 12 |
| State | Published - Dec 2011 |
| Externally published | Yes |
Keywords
- Axial loaded behaviour
- Recycled aggregate concrete filled steel tube
- Reinforced recycled aggregate concrete
- Static experiment
- Stub column
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