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PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping
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
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.
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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