Sequentially linear modelling of combined tension/compression failure in masonry structures

The modelling of brittle fracture is essential for the assessment of structural safety. It remains a challenge due to sharp material softening after realization of the material strength. Standard nonlinear finite element analysis techniques using incremental-iterative solution procedures have been adapted to deal with the sharp softening curves associated with brittle materials, but convergence difficulties have stimulated the development of alternative modelling methods. The sequentially linear analysis method is an attractive alternative approach, since it is driven by increments of damage instead of increments of displacements, force or time. Consequently, this non-iterative procedure circumvents the aforementioned convergence difficulties. This method is still in its development stage and needs to be augmented, verified with tests and validated with experimental results with respect to multiple situations. In this thesis the recent sequentially linear analysis software is verified and combined tension-compression failure is validated with the aid of a masonry deep wall-frame structure.

Subject

finite elements
sequentially linear analysis
deep wall-frame structure
masonry
tension/compression failure
brittle material behaviour

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master thesis

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