Abstract
The present contribution advocates an up-scaling procedure for computing the limit loads of spatial structures made of composite beams. The resolution of an auxiliary yield design problem leads to the determination of a yield surface in the space of axial force and bending moments. A general method for approximating the numerically computed yield surface by a sum of several ellipsoids is developed. The so-obtained analytical expression of the criterion is then incorporated in the yield design calculations of the whole structure, using second-order cone programming techniques. An illustrative application to a complex spatial frame structure is presented.
| Original language | English |
|---|---|
| Pages (from-to) | 86-98 |
| Number of pages | 13 |
| Journal | Computers and Structures |
| Volume | 129 |
| DOIs | |
| Publication status | Published - 17 Oct 2013 |
| Externally published | Yes |
Keywords
- Composite frames
- Finite element method
- Limit analysis
- Second-order cone programming
- Yield design
- Yield surface approximation
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