Experimental Study of Damage Evolution in Circular Stirrup-Confined Concrete
| Autor: | Ying Wang, Peng Zhihan, Jun Teng, Zuohua Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
0211 other engineering and technologies circular stirrups 02 engineering and technology Plasticity lcsh:Technology Article experimental study Brittleness 021105 building & construction General Materials Science Composite material lcsh:Microscopy Ductility lcsh:QC120-168.85 lcsh:QH201-278.5 lcsh:T business.industry Comparison results damage evolution Structural engineering 021001 nanoscience & nanotechnology concrete confinement Stirrup Surface-area-to-volume ratio lcsh:TA1-2040 Evolution equation Curve fitting lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology business lcsh:TK1-9971 |
| Zdroj: | Materials Materials; Volume 9; Issue 4; Pages: 278 Materials, Vol 9, Iss 4, p 278 (2016) |
| Popis: | This paper presents an experimental study on circular stirrup-confined concrete specimens under uniaxial and monotonic load. The effects of stirrup volume ratio, stirrup yield strength and concrete strength on damage evolution of stirrup-confined concrete were investigated. The experimental results showed that the strength and ductility of concrete are improved by appropriate arrangement of the stirrup confinement. Firstly, the concrete damage evolution can be relatively restrained with the increase of the stirrup volume ratio. Secondly, higher stirrup yield strength usually causes larger confining pressures and slower concrete damage evolution. In contrast, higher concrete strength leads to higher brittleness, which accelerates the concrete damage evolution. A plastic strain expression is obtained through curve fitting, and a damage evolution equation for circular stirrup-confined concrete is proposed by introducing a confinement factor (C) based on the experimental data. The comparison results demonstrate that the proposed damage evolution model can accurately describe the experimental results. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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