Most of the research on seismic retrofit approaches focuses on the development of innovative retrofit solutions with the aim to improve the seismic performance of existing buildings through either local or global strengthening. An effective alternative approach is controlling the seismic performance of existing buildings through the selective weakening of specific portions of the structure, particularly to reduce stiffness irregularities. The present research focuses on a possible weakening approach dealing with the transformation of the existing reinforced concrete (RC) columns of a given story, specifically at the ground level, into rocking columns. This solution will lead to a global behavior like the one of an isolated system. The advantages of such a solution are, among others: the reduction of the relative displacement demand at the stories above the rocking system (i.e., damage reduction at the upper stories), the reduction of damage in the RC columns through a confined rocking region, the lumping of the construction works at just one story, the possibility to couple the rocking columns with additional energy dissipation or recentering systems. The effectiveness of the proposed solution has been preliminarily evaluated through the application to a reference case study.

(2023). Preliminary considerations on the selective weakening of RC columns through rocking systems . In PROCEDIA STRUCTURAL INTEGRITY. Retrieved from https://hdl.handle.net/10446/237938

Preliminary considerations on the selective weakening of RC columns through rocking systems

Belleri, Andrea;Labo', Simone;Marini, Alessandra;
2023-01-01

Abstract

Most of the research on seismic retrofit approaches focuses on the development of innovative retrofit solutions with the aim to improve the seismic performance of existing buildings through either local or global strengthening. An effective alternative approach is controlling the seismic performance of existing buildings through the selective weakening of specific portions of the structure, particularly to reduce stiffness irregularities. The present research focuses on a possible weakening approach dealing with the transformation of the existing reinforced concrete (RC) columns of a given story, specifically at the ground level, into rocking columns. This solution will lead to a global behavior like the one of an isolated system. The advantages of such a solution are, among others: the reduction of the relative displacement demand at the stories above the rocking system (i.e., damage reduction at the upper stories), the reduction of damage in the RC columns through a confined rocking region, the lumping of the construction works at just one story, the possibility to couple the rocking columns with additional energy dissipation or recentering systems. The effectiveness of the proposed solution has been preliminarily evaluated through the application to a reference case study.
2023
Belleri, Andrea; Labo', Simone; Marini, Alessandra; Biffi, Maria Adele; Vigani, Michele
File allegato/i alla scheda:
File Dimensione del file Formato  
Belleri et al .- Preliminary considerations on the selective weakening - Anidis 2022.pdf

accesso aperto

Versione: publisher's version - versione editoriale
Licenza: Creative commons
Dimensione del file 953.33 kB
Formato Adobe PDF
953.33 kB 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/10446/237938
Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact