%0 Generic
%A Tubaldi, E
%A Freddi, F
%A Zona, A
%A Dall'Asta, A
%C Pistoia, Italy
%D 2017
%F discovery:1575846
%I ANIDIS
%K Buckling-restrained braces, dual systems, cumulative ductility, residual displacement, seismic  performance.
%T Seismic performance of structural systems equipped with buckling-restrained braces
%U https://discovery.ucl.ac.uk/id/eprint/1575846/
%X Buckling-restrained braces (BRBs) are often employed for the seismic retrofit of existing systems and the design of  new systems given their significant contribution in terms of stiffness and added damping. However, since BRBs are  characterized by a low lateral post-elastic stiffness, their use may lead to excessive residual deformations that may  jeopardize the reparability of the building. Moreover, accumulation of plastic deformations in the BRBs may  endanger the capability of withstanding multiple earthquakes and aftershocks. The objective of this paper is to  provide insight into the performance and residual capacity of dual systems made of BRB frames coupled with  moment-resisting frames. This study considers a simplified single degree of freedom model which permits to  investigate a wide range of configurations. A non-dimensional formulation of the equation of motion is introduced,  the statistic of the normalized peak and residual displacements and cumulative ductility of the system is evaluated  under a set of ground motion records. Different values of the BRB target maximum ductility and different coupled  frame properties are considered. The results of this study provide useful information for the preliminary design of  dual systems made of BRB frames coupled with moment-resisting frames.
%Z This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.