Pin-supported (PS) walls represent a possible solution for the seismic retrofit of existing reinforced concrete (RC) buildings, enabling linearization of the frame deformation along its height and consequently inhibiting soft storey collapse mechanisms. The effectiveness of this rehabilitation technology is strongly related to the characteristics of the existing frames, especially to the vertical distribution of the frame storey lateral stiffness. Since a larger 1st storey lateral stiffness may lead to a detrimental structural response of the retro- fitted system, an alternative solution obtained from removing the connecting link between the 1st floor of the existing building and the pin-supported wall is investigated in this paper. An analytical method is proposed to derive the distribution of the internal actions in a dual 2D RC frame-PS wall system without the link at the 1st floor level, considering both a lin- ear and nonlinear behaviour of the frame. It emerges that some parameters describing the structure type can provide straightforward information on the suitability of this solution in the seismic retrofit of existing RC buildings. As a result, a simplified procedure has been derived to preliminarily define the retrofit system configuration and evaluate the maximum demand in the PS wall. Such a procedure is finally applied with reference to a frame rep- resenting a RC building and finite element model analyses are carried out for validation purposes.

(2023). Pin-supported walls as seismic retrofit for existing RC frames: performance improvement through link removal [journal article - articolo]. In BULLETIN OF EARTHQUAKE ENGINEERING. Retrieved from https://hdl.handle.net/10446/237758

Pin-supported walls as seismic retrofit for existing RC frames: performance improvement through link removal

Casprini, Elena;Belleri, Andrea;Marini, Alessandra;Passoni, Chiara;Labo, Simone
2023-01-01

Abstract

Pin-supported (PS) walls represent a possible solution for the seismic retrofit of existing reinforced concrete (RC) buildings, enabling linearization of the frame deformation along its height and consequently inhibiting soft storey collapse mechanisms. The effectiveness of this rehabilitation technology is strongly related to the characteristics of the existing frames, especially to the vertical distribution of the frame storey lateral stiffness. Since a larger 1st storey lateral stiffness may lead to a detrimental structural response of the retro- fitted system, an alternative solution obtained from removing the connecting link between the 1st floor of the existing building and the pin-supported wall is investigated in this paper. An analytical method is proposed to derive the distribution of the internal actions in a dual 2D RC frame-PS wall system without the link at the 1st floor level, considering both a lin- ear and nonlinear behaviour of the frame. It emerges that some parameters describing the structure type can provide straightforward information on the suitability of this solution in the seismic retrofit of existing RC buildings. As a result, a simplified procedure has been derived to preliminarily define the retrofit system configuration and evaluate the maximum demand in the PS wall. Such a procedure is finally applied with reference to a frame rep- resenting a RC building and finite element model analyses are carried out for validation purposes.
articolo
2023
Casprini, Elena; Belleri, Andrea; Marini, Alessandra; Passoni, Chiara; Labo, Simone
(2023). Pin-supported walls as seismic retrofit for existing RC frames: performance improvement through link removal [journal article - articolo]. In BULLETIN OF EARTHQUAKE ENGINEERING. Retrieved from https://hdl.handle.net/10446/237758
File allegato/i alla scheda:
File Dimensione del file Formato  
IJ40 - Pub - pin-supported walls - link removal - BEE.pdf

accesso aperto

Versione: publisher's version - versione editoriale
Licenza: Creative commons
Dimensione del file 2.47 MB
Formato Adobe PDF
2.47 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Aisberg ©2008 Servizi bibliotecari, Università degli studi di Bergamo | Terms of use/Condizioni di utilizzo

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/237758
Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact