TY  - GEN
KW  - Reinforced Concrete Frames
KW  -  Fragility
KW  -  Vulnerability Assessment
KW  -  Seismic Retrofit
KW  -  Dissipative Braces
A1  - Freddi, F
A1  - Tubaldi, E
A1  - Dall'Asta, A
A1  - Ragni, L
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
ID  - discovery1575835
UR  - http://www.anidis.it/
N2  - This paper deals with the seismic performance and risk assessment of existing reinforced concrete (RC) buildings
with limited ductility retrofitted by means of buckling restrained braces (BRBs). Two different approaches for
evaluating the seismic vulnerability and risk before and after retrofit are introduced and analyzed. These
approaches involve the use of different categories of engineering demand parameters (EDPs) for the system
response assessment: global EDPs, that permit to obtain a synthetic description of the system behavior at a reduced
computational cost, and local EDPs, more accurate in describing the response of the frame elements and of the
BRBs, though more demanding from a computational point of view. The effect of the EDPs choice is analyzed by
considering a two-dimensional RC frame designed for gravity-loads only as case study. The frame is retrofitted by
introducing elasto-plastic dissipative braces designed for different levels of base shear capacity. The results of the
study show that the use of global EDPs leads to a significant overestimation of the retrofit effectiveness in terms of
both vulnerability and risk reduction. If a risk-based design is carried out for the retrofit system, braces with
significantly lower dimensions are obtained by using global EDPs instead of local EDPs.
AV  - public
TI  - Local and Global Response Parameters in Seismic Risk Assessment of RC Frames Retrofitted by BRBs
Y1  - 2013///
ER  -