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EnglishThe 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.
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| Titolo: | A new method for out‐of‐plane reinforcement of masonry walls using high strength steel strand |
| Autori: | AGNETTI, STEFANO [Software] |
| Data di pubblicazione: | 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. |
| Handle: | http://hdl.handle.net/11391/1474020 |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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