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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 106
PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
Edited by:
Paper 76

Application of a Three-Dimensional Rigid Block Model to the Limit Analysis of Large Scale Masonry Panels

F. Portioli, C. Casapulla and L. Cascini

Department of Structures for Engineering and Architecture, University of Naples "Federico II", Italy

Full Bibliographic Reference for this paper
F. Portioli, C. Casapulla, L. Cascini, "Application of a Three-Dimensional Rigid Block Model to the Limit Analysis of Large Scale Masonry Panels", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 76, 2014. doi:10.4203/ccp.106.76
Keywords: rigid block assemblages, limit analysis, dry-joint masonry, associative flow rules, large scale panels..

Summary
A rigid block model for three-dimensional limit analysis of masonry structures is used to investigate the behaviour of large scale masonry panels. A micro-modelling approach is adopted, based on the discretization of masonry units into blocks divided by frictional and tensionless contact interfaces. A convex contact formulation is used for interfaces and an iterative procedure based on linear programming is implemented to take into account interaction effects among static variables. Failure modes involve rocking, separation, sliding and torsion. Yield functions are defined to take into account interactions of shear forces, torsion and bending moments. Associative flow rules are considered for friction behaviour.

Different experimental investigations on large wall panels from the literature are considered for validation. The accuracy of predicted results is discussed and the computational efficiency of implemented formulation is evaluated in terms of CPU time.

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