UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Seismic performance of structural systems equipped with buckling-restrained braces

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). Green open access

[img]
Preview
Text
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
Downloads since deposit
78Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item