Abstract
Concrete does not exhibit rigid-plastic behaviour, but it is nevertheless convenient to assume so for practical design and analysis. In order to account for the actual behaviour, a so-called effectiveness factor is introduced, which have been approximated for various standard problems. For general numerical analysis, however, a different approach is needed, where the actual stress and strain fields are taken into account. Using a recently developed formulation, the implications are analysed for the Mohr-Coulomb yield criterion and a closed-form approximation for use in finite element limit analysis is proposed. The reduced yield surface is compared to the closed-form approximation for various choices of reinforcement layouts.
| Original language | English |
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| Publication date | 2018 |
| Number of pages | 11 |
| Publication status | Published - 2018 |
| Event | The International Federation for Structural Concrete 5th International fib Congress - Melbourne, Australia Duration: 7 Oct 2018 → 11 Oct 2018 Conference number: 5 |
Conference
| Conference | The International Federation for Structural Concrete 5th International fib Congress |
|---|---|
| Number | 5 |
| Country/Territory | Australia |
| City | Melbourne |
| Period | 07/10/2018 → 11/10/2018 |
Keywords
- Yield surface
- Effectiveness factor
- Optimisation
- Finite element