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A Macroelement Formulation for Modeling Strengthened and Reinforced Masonry Elements
https://orcid.org/http://orcid.org/0000-0003-0990-7402
https://orcid.org/http://orcid.org/0000-0001-7853-3710
https://orcid.org/http://orcid.org/0000-0001-6457-7827
The poor performance often exhibited by historical masonry buildings in seismic events has prompted the development of strengthening interventions to improve the response of existing structures on one hand, and the adoption of reinforced and confined masonry systems for new buildings on the other hand. Several retrofit solutions consist of adding materials with significant tensile strength to the masonry walls, for example by jacketing with fabric- or composite-reinforced mortars, by inserting near-surface-mounted bars, or by connecting steel or timber exoskeletons. Similarly, reinforced and confined masonry elements incorporate steel or composite bars directly within the masonry or into reinforced concrete ties cast against it.
This paper discusses a new three-dimensional macroelement, developed to explicitly model the effects of tensile reinforcement on both in-plane and out-of-plane axial-flexural responses; this will enhance the accuracy of nonlinear global seismic analyses compared to modeling the in-plane response only and to adopting empirical correction coefficients for masonry mechanical properties. The formulation encompasses surface layers and lumped fibers, which enables representing various strengthening and reinforcing layouts. Adopting an axial-flexural behavior integrated over stripes can reduce the computational effort compared to a complete cross-section fiber discretization. The nonlinear shear response of the retrofit material can be also incorporated in the macroelement but is not discussed in this paper.
A Macroelement Formulation for Modeling Strengthened and Reinforced Masonry Elements
https://orcid.org/http://orcid.org/0000-0003-0990-7402
https://orcid.org/http://orcid.org/0000-0001-7853-3710
https://orcid.org/http://orcid.org/0000-0001-6457-7827
The poor performance often exhibited by historical masonry buildings in seismic events has prompted the development of strengthening interventions to improve the response of existing structures on one hand, and the adoption of reinforced and confined masonry systems for new buildings on the other hand. Several retrofit solutions consist of adding materials with significant tensile strength to the masonry walls, for example by jacketing with fabric- or composite-reinforced mortars, by inserting near-surface-mounted bars, or by connecting steel or timber exoskeletons. Similarly, reinforced and confined masonry elements incorporate steel or composite bars directly within the masonry or into reinforced concrete ties cast against it.
This paper discusses a new three-dimensional macroelement, developed to explicitly model the effects of tensile reinforcement on both in-plane and out-of-plane axial-flexural responses; this will enhance the accuracy of nonlinear global seismic analyses compared to modeling the in-plane response only and to adopting empirical correction coefficients for masonry mechanical properties. The formulation encompasses surface layers and lumped fibers, which enables representing various strengthening and reinforcing layouts. Adopting an axial-flexural behavior integrated over stripes can reduce the computational effort compared to a complete cross-section fiber discretization. The nonlinear shear response of the retrofit material can be also incorporated in the macroelement but is not discussed in this paper.
A Macroelement Formulation for Modeling Strengthened and Reinforced Masonry Elements
https://orcid.org/http://orcid.org/0000-0003-0990-7402
https://orcid.org/http://orcid.org/0000-0001-7853-3710
https://orcid.org/http://orcid.org/0000-0001-6457-7827
The poor performance often exhibited by historical masonry buildings in seismic events has prompted the development of strengthening interventions to improve the response of existing structures on one hand, and the adoption of reinforced and confined masonry systems for new buildings on the other hand. Several retrofit solutions consist of adding materials with significant tensile strength to the masonry walls, for example by jacketing with fabric- or composite-reinforced mortars, by inserting near-surface-mounted bars, or by connecting steel or timber exoskeletons. Similarly, reinforced and confined masonry elements incorporate steel or composite bars directly within the masonry or into reinforced concrete ties cast against it.
This paper discusses a new three-dimensional macroelement, developed to explicitly model the effects of tensile reinforcement on both in-plane and out-of-plane axial-flexural responses; this will enhance the accuracy of nonlinear global seismic analyses compared to modeling the in-plane response only and to adopting empirical correction coefficients for masonry mechanical properties. The formulation encompasses surface layers and lumped fibers, which enables representing various strengthening and reinforcing layouts. Adopting an axial-flexural behavior integrated over stripes can reduce the computational effort compared to a complete cross-section fiber discretization. The nonlinear shear response of the retrofit material can be also incorporated in the macroelement but is not discussed in this paper.
A Macroelement Formulation for Modeling Strengthened and Reinforced Masonry Elements
Lecture Notes in Civil Engineering
Milani, Gabriele (editor) / Ghiassi, Bahman (editor) / Salvatori, Christian (author) / Guerrini, Gabriele (author) / Galasco, Alessandro (author) / Penna, Andrea (author)
International Brick and Block Masonry Conference ; 2024 ; Birmingham, United Kingdom
2024-12-13
13 pages
Article/Chapter (Book)
Electronic Resource
English
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