Limit analysis

Limit analysis is a structural analysis field which is dedicated to the development of efficient methods to directly determine estimates of the collapse load of a given structural model without resorting to iterative or incremental analysis. For this purpose, the field of limit analysis is based on a set of theorems, referred to as limit theorems, which are a set of theorems based on the law of conservation of energy that state properties regarding stresses and strains, lower and upper-bound limits for the collapse load and the exact collapse load.

## Software for limit analysis

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* OPTUM G2 (2014-) General purpose software for geotechnical applications in 2D (also includes elastoplasticity, seepage, consolidation, staged construction, tunneling, and other relevant geotechnical analysis types).
* OPTUM G3 (2018-) General purpose software for geotechnical applications in 3D (also includes other relevant geotechnical analysis types).
* OPTUM CS (Concrete Solutions) (2019-) 3D design and analysis software for both pre-cast and in-situ concrete (also includes elastoplasticity).
* OPTUM MP (2019-) Free 2D concrete slab design and analysis software.
* LimitState:GEO (2008-) General purpose geotechnical software limit analysis application. Uses discontinuity layout optimization.
* LimitState:SLAB (2015-) Limit analysis software application for slabs. Uses discontinuity layout optimization.

## References

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* Chen, Wai-Fah; Da-Jian Han (2007). Plasticity for structural engineers. J. Ross publishing classics. pp. 409–490. ISBN 978-1-932159-75-2.

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