Tubaldi, E;
Freddi, F;
Zona, A;
Dall'Asta, A;
(2017)
Seismic performance of structural systems equipped with buckling-restrained braces.
In:
Proceedings of XVII National Conference ANIDIS, L'Ingegneria sismica in Italia.
ANIDIS: Pistoia, Italy.
(In press).
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Freddi_et al. 2017_ANIDIS_Seismic performance of structural systems equipped with buckling-restrained braces - Submitted.pdf - Accepted Version Download (515kB) | Preview |
Abstract
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.
| Type: | Proceedings paper |
|---|---|
| Title: | Seismic performance of structural systems equipped with buckling-restrained braces |
| Event: | XVII National Conference ANIDIS, L'Ingegneria sismica in Italia |
| Location: | Pistoia, Italy |
| Dates: | 17 September 2017 - 21 September 2017 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://convegno.anidis.it/index.php/anidis/2017 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Buckling-restrained braces, dual systems, cumulative ductility, residual displacement, seismic performance. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1575846 |
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