Seismic retrofitting of braced frame buildings by RC rocking walls and viscous dampers

2018 ◽  
Vol 47 (13) ◽  
pp. 2682-2707 ◽  
Author(s):  
Francesca Barbagallo ◽  
Melina Bosco ◽  
Edoardo M. Marino ◽  
Pier Paolo Rossi
Keyword(s):  
Seismic Retrofitting ◽  
Viscous Dampers ◽  
Braced Frame ◽  
Frame Buildings ◽  
Rocking Walls

11.17: Seismic retrofitting of concentrically braced frames by rocking walls and viscous dampers

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 2975-2984
Author(s):  
Francesca Barbagallo ◽  
Melina Bosco ◽  
Edoardo M. Marino ◽  
Pier Paolo Rossi
Keyword(s):  
Seismic Retrofitting ◽  
Braced Frames ◽  
Concentrically Braced Frames ◽  
Viscous Dampers ◽  
Concentrically Braced ◽  
Rocking Walls

Seismic Retrofitting of Eccentrically Braced Frames by Rocking Walls and Viscous Dampers

2018 ◽  
Vol 763 ◽  
pp. 1105-1112 ◽  
Author(s):  
Francesca Barbagallo ◽  
Melina Bosco ◽  
Aurelio Ghersi ◽  
Edoardo Michele Marino ◽  
Pier Paolo Rossi
Keyword(s):  
Damping Ratio ◽  
Design Procedure ◽  
Seismic Retrofitting ◽  
Braced Frames ◽  
Viscous Dampers ◽  
Equivalent Viscous Damping ◽  
Eccentrically Braced Frames ◽  
Displacement Ductility ◽  
Displacement Capacity ◽  
Rocking Walls

A design procedure for seismic retrofitting of eccentrically braced frames (EBFs) by rocking walls and viscous dampers is proposed. The design procedure is founded on the displacement-based approach. The top displacement capacity of the building is evaluated based on the displacement ductility capacity of links and on a rigid lateral deformed configuration of the structure promoted by the rocking walls. The equivalent viscous damping ratio capacity of the EBFs with rocking walls is calculated by semi-empirical relationships specifically calibrated for EBFs with links characterized by mechanical length lower than 2.0. Additional damping is provided by linear viscous dampers. The design internal forces of the rocking walls are evaluated based on the seismic effects of more than one mode of vibration. The effectiveness of the design procedure is verified by means of a case study.

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