Traditional masonry buildings are highly vulnerable to earthquake loading and their dynamic response is stronglyinfluenced by the in-plane deformability of the timber floors and the quality of the wall-to-floor connections.Understanding the behaviour of timber floors and roofs and their interaction with masonry walls is thereforefundamental for the protection of historical buildings. In a previous research project, different timber-baseddry-connected strengthening solutions for timber floors were tested under in-plane loading. The experimental resultsshowed a significant increase in shear strength and stiffness. In the current study, the discrete-element method (DEM)was used to model a simple masonry structure and evaluate the effectiveness of strengthening solutions to avoidtriggering first-mode mechanisms, namely out-of-plane collapse of masonry walls. The structure was stressed byseismic ground accelerations. The unreinforced and reinforced floors were modelled with non-linear springs thatreproduced their experimental hysteretic response. Parametric analyses were performed, changing the geometryof the structure and the masonry wall thickness. The comparison highlighted the effectiveness of the proposedwood-based strengthening solutions for reducing out-of-plane displacements of masonry walls, potentially matchingthe performance of rigid floors.

Discrete-element analysis of floor influence on seismic response of masonry structures

Gubana, Alessandra
;
Melotto, Massimo
2021

Abstract

Traditional masonry buildings are highly vulnerable to earthquake loading and their dynamic response is stronglyinfluenced by the in-plane deformability of the timber floors and the quality of the wall-to-floor connections.Understanding the behaviour of timber floors and roofs and their interaction with masonry walls is thereforefundamental for the protection of historical buildings. In a previous research project, different timber-baseddry-connected strengthening solutions for timber floors were tested under in-plane loading. The experimental resultsshowed a significant increase in shear strength and stiffness. In the current study, the discrete-element method (DEM)was used to model a simple masonry structure and evaluate the effectiveness of strengthening solutions to avoidtriggering first-mode mechanisms, namely out-of-plane collapse of masonry walls. The structure was stressed byseismic ground accelerations. The unreinforced and reinforced floors were modelled with non-linear springs thatreproduced their experimental hysteretic response. Parametric analyses were performed, changing the geometryof the structure and the masonry wall thickness. The comparison highlighted the effectiveness of the proposedwood-based strengthening solutions for reducing out-of-plane displacements of masonry walls, potentially matchingthe performance of rigid floors.
File in questo prodotto:
File Dimensione Formato  
jstbu.19.00099.pdf

non disponibili

Tipologia: Versione Editoriale (PDF)
Licenza: Non pubblico
Dimensione 1.93 MB
Formato Adobe PDF
1.93 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

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: http://hdl.handle.net/11390/1169821
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 7
social impact