The paper analyses the problem of assessing the seismic capacity of walls subjected to seismic loading, with particular emphasis to out‐of‐plane loads, before and after reinforcement. A new retrofitting method, consisting in the use of high strength steel strands embedded in the mortar bed joints was studied. The proposed method allows to preserve the fair-faced aspect of the masonry, while improving the out-of-plane capacity of the building’s wall panels perpendicular to the direction of the seismic action (face-loaded walls). An experimental investigation using full-scale masonry specimens was carried out in an attempt to assess the walls’ structural response when these are subject to out-of-plane loads. Test results demonstrated that it is possible to increase the out-of-plane capacity of the walls with the proposed method. However, it is shown that the out-of-plane capacity of face-loaded walls is sensitive to several parameters, which are usually affected by strong uncertainty when assessing an existing building, namely the boundary conditions, the ten-sile strength of the mortar and the wall-to-wall connections.

A new method for out‐of‐plane reinforcement of masonry walls using high strength steel strand

Marco Corradi
Methodology
;
Emanuela Speranzini
Membro del Collaboration Group
;
Antonio Borri
Membro del Collaboration Group
;
S. Agnetti
Software
2020

Abstract

The paper analyses the problem of assessing the seismic capacity of walls subjected to seismic loading, with particular emphasis to out‐of‐plane loads, before and after reinforcement. A new retrofitting method, consisting in the use of high strength steel strands embedded in the mortar bed joints was studied. The proposed method allows to preserve the fair-faced aspect of the masonry, while improving the out-of-plane capacity of the building’s wall panels perpendicular to the direction of the seismic action (face-loaded walls). An experimental investigation using full-scale masonry specimens was carried out in an attempt to assess the walls’ structural response when these are subject to out-of-plane loads. Test results demonstrated that it is possible to increase the out-of-plane capacity of the walls with the proposed method. However, it is shown that the out-of-plane capacity of face-loaded walls is sensitive to several parameters, which are usually affected by strong uncertainty when assessing an existing building, namely the boundary conditions, the ten-sile strength of the mortar and the wall-to-wall connections.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11391/1474020
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact