A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Masonry nonlinear response: modeling and analysis of the effects of damaging mechanisms
Over the last decades, many efforts were devoted to develop efficient and accurate numerical procedures for the assessment of the structural capacity of masonry constructions. The main difficulties in modeling this type of material are due to its heterogeneous nature. Indeed, masonry is composed by blocks, stones or bricks, connected with or without mortar, whose geometry, mechanical properties and arrangement strongly affect the overall response. Among the available modeling strategies, finite element models appear to be suitable tools to describe the evolution of the nonlinear mechanisms developing in the material under typical loading conditions. Within this framework, macromechanical models, which consider masonry as an equivalent homogeneous, isotropic or anisotropic medium, are a fair compromise between accuracy and computational burden. Stemming on the above considerations, this work focuses on the development of constitutive laws involving damage and plasticity inner variables, tailored to the macromechanical analysis of 2D masonry structures. Herein, a new isotropic damage-plastic model, which is an enhanced version of that presented by Addessi et al. (2002), is proposed. This model is able to capture the degrading mechanisms due to propagation of microcracks and accumulation of irreversible strains, as well as the stiffness recovery related to cracks re-closure. Moreover, to account for the variation of the mechanical properties in the different material directions, a novel orthotropic damage model is developed to deal with regular masonry textures. The proposed models are implemented in finite element procedures, where the mesh-dependency problem is efficiently overcome by adopting nonlocal integral formulations. Numerical applications are performed to assess the models capacity of describing the material inelastic behavior and comparisons of numerically and experimentally evaluated responses are also provided for some masonry panels. Finally, the effects of degrading mechanisms on masonry dynamic ...
Masonry nonlinear response: modeling and analysis of the effects of damaging mechanisms
Over the last decades, many efforts were devoted to develop efficient and accurate numerical procedures for the assessment of the structural capacity of masonry constructions. The main difficulties in modeling this type of material are due to its heterogeneous nature. Indeed, masonry is composed by blocks, stones or bricks, connected with or without mortar, whose geometry, mechanical properties and arrangement strongly affect the overall response. Among the available modeling strategies, finite element models appear to be suitable tools to describe the evolution of the nonlinear mechanisms developing in the material under typical loading conditions. Within this framework, macromechanical models, which consider masonry as an equivalent homogeneous, isotropic or anisotropic medium, are a fair compromise between accuracy and computational burden. Stemming on the above considerations, this work focuses on the development of constitutive laws involving damage and plasticity inner variables, tailored to the macromechanical analysis of 2D masonry structures. Herein, a new isotropic damage-plastic model, which is an enhanced version of that presented by Addessi et al. (2002), is proposed. This model is able to capture the degrading mechanisms due to propagation of microcracks and accumulation of irreversible strains, as well as the stiffness recovery related to cracks re-closure. Moreover, to account for the variation of the mechanical properties in the different material directions, a novel orthotropic damage model is developed to deal with regular masonry textures. The proposed models are implemented in finite element procedures, where the mesh-dependency problem is efficiently overcome by adopting nonlocal integral formulations. Numerical applications are performed to assess the models capacity of describing the material inelastic behavior and comparisons of numerically and experimentally evaluated responses are also provided for some masonry panels. Finally, the effects of degrading mechanisms on masonry dynamic ...
Masonry nonlinear response: modeling and analysis of the effects of damaging mechanisms
GATTA, CRISTINA (author) / Gatta, Cristina / ADDESSI, Daniela / VESTRONI, Fabrizio / BONTEMPI, Franco
2019-02-26
Theses
Electronic Resource
English
DDC:
690
Lessons learned from damaging interactions between masonry facades and building structures
| British Library Conference Proceedings | 1998
Effects of Degrading Mechanisms on Masonry Dynamic Response
| Springer Verlag | 2019
Damaging Behavior of Masonry Arch Bridges: Analysis of ‘Ponte delle Torri’ in Spoleto, Italy
| Taylor & Francis Verlag | 2022
| British Library Conference Proceedings | 2010