Safety Assessment of Four Masonry Churches by a Plate and Shell FE Nonlinear Approach
Publication: Journal of Performance of Constructed Facilities
Volume 27, Issue 1
Abstract
A full three-dimensional finite-element (FE) homogenized modeling computer program for the evaluation of the nonlinear static behavior of entire masonry structures subjected to horizontal actions is presented and tested on four large-scale masonry churches located in the central region of Italy. At the structural level, masonry is modeled as a homogeneous, orthotropic material featuring softening in tension, shear, and compression. Rigid, infinitely resistant triangular elements connected by elastoplastic interfaces are used to perform full-scale nonlinear analyses. To reduce further processing time needed for the simulations, preliminary FE limit analyses were conducted to identify the failure mechanisms, and hence the interfaces that undergo plasticization during the deformation process. In this way, it is possible to concentrate nonlinearity exclusively on those interfaces that prove active in the limit-analysis problem. Finally, full nonlinear pushover curves are compared with collapse loads; the latter is provided by a limit analysis that assumes a limited number of possible preassigned failure mechanisms, as required by the recent Italian Building Code guidelines on monumental buildings.
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Published In
Journal of Performance of Constructed Facilities
Volume 27 • Issue 1 • February 2013
Pages: 27 - 42
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jun 23, 2011
Accepted: Dec 15, 2011
Published online: Dec 20, 2011
Published in print: Feb 1, 2013
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