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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 108
PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping
Paper 50

An Enriched Kinematic Formulation for Masonry Walls with a Damage-Plastic Model

D. Addessi1 and E. Sacco2

1Department of Structural and Geotechnical Engineering, University of Rome Sapienza, Italy
2Department of Civil and Mechanical Engineering, University of Cassino and of the Southern Lazio, Italy

Full Bibliographic Reference for this paper
D. Addessi, E. Sacco, "An Enriched Kinematic Formulation for Masonry Walls with a Damage-Plastic Model", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 50, 2015. doi:10.4203/ccp.108.50
Keywords: generalized plane state, damage, enriched kinematics, masonry, FEAP.

Summary
This paper presents a kinematic enriched finite element model for the nonlinear analysis of brick masonry walls loaded in their plane. The model correctly accounts for the mortar-brick interaction in the direction of the thickness of the wall. Nonlocal nonlinear constitutive laws are considered both for mortar and bricks, adopting a damage-friction law for the mortar and an isotropic damage model for the bricks, both based on tensile failure mechanisms. In particular, a new two-dimensional four-node finite element, properly accounting for the three-dimensional state of strain and stress in the masonry wall, is developed and implemented in the finite element code FEAP. An experimental masonry panel, acting as a deep beam under vertical load, is analyzed to point out the effectiveness of the proposed model and the implemented finite element numerical procedure.

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