The paper is focused on the macro-scale non-linear modeling of regular running-bond masonry panels subjected to out-of-plane pushover analysis. The work is the point of convergence of two research lines: i) one is focused on the development of an original meso-scale technique based on a heuristic homogenization approach for masonry panels; ii) the other is devoted to the macro-scale modeling of heterogeneous materials by means of a specific rigid body and spring approach, RBSM. The meso-scale technique is based on a simplified kinematics in which each block is supposed to interact with its six neighbors by means of plane interfaces. In this way, the flexural and torsional moment-curvature constitutive relations in the non-linear field are obtained at the sectional level. Finally, the response of the masonry panel is computed at the macro-scale level by means of a mechanistic model, that is made by rigid elements jointed by spherical hinges and non-linear springs in which all the plastic dissipation and the mechanical damages occur. This combined approach entails a drastic reduction of the computational effort because the standard non-linear FE discretization is completely avoided both at a cell and structural level. The paper presents a validation through comparisons of the step-by-step pressure-displacement curves for masonry panels subjected to various geometry, constraints and flexion conditions. The good agreement found between present numerical results and literature data, suggests that the model may be a valuable tool for practitioners involved in the pushover analysis of masonry walls out-of-plane loaded.

A simplified homogenization-discrete element model for the non-linear static analysis of masonry walls out-of-plane loaded

CASOLO, SIRO;MILANI, GABRIELE
2010-01-01

Abstract

The paper is focused on the macro-scale non-linear modeling of regular running-bond masonry panels subjected to out-of-plane pushover analysis. The work is the point of convergence of two research lines: i) one is focused on the development of an original meso-scale technique based on a heuristic homogenization approach for masonry panels; ii) the other is devoted to the macro-scale modeling of heterogeneous materials by means of a specific rigid body and spring approach, RBSM. The meso-scale technique is based on a simplified kinematics in which each block is supposed to interact with its six neighbors by means of plane interfaces. In this way, the flexural and torsional moment-curvature constitutive relations in the non-linear field are obtained at the sectional level. Finally, the response of the masonry panel is computed at the macro-scale level by means of a mechanistic model, that is made by rigid elements jointed by spherical hinges and non-linear springs in which all the plastic dissipation and the mechanical damages occur. This combined approach entails a drastic reduction of the computational effort because the standard non-linear FE discretization is completely avoided both at a cell and structural level. The paper presents a validation through comparisons of the step-by-step pressure-displacement curves for masonry panels subjected to various geometry, constraints and flexion conditions. The good agreement found between present numerical results and literature data, suggests that the model may be a valuable tool for practitioners involved in the pushover analysis of masonry walls out-of-plane loaded.
2010
Masonry; Out-of-plane loads; Simplified homogenization; Rigid elements; Pushover analysis
File in questo prodotto:
File Dimensione Formato  
es2010_casolo_milani.pdf

Accesso riservato

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 2.63 MB
Formato Adobe PDF
2.63 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/569721
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 67
  • ???jsp.display-item.citation.isi??? 48
social impact