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Design methods for existing r.c. frames equipped with elasto-plastic or viscoelastic dissipative braces

Dall'Asta, A; Ragni, L; Tubaldi, E; Freddi, F; (2009) Design methods for existing r.c. frames equipped with elasto-plastic or viscoelastic dissipative braces. In: Proceedings of the XIII National Conference ANIDIS 2009: L'Ingegneria sismica in Italia. ANIDIS: Bologna, Italy. Green open access

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Abstract

Dissipative braces have proven to be very efficient devices for new buildings and seismic retrofitting of existing structures. In this paper a design method for dissipative braces based on elastic-plastic or viscoelastic behaviour, inserted in reinforced concrete existing frames with limited ductility, is proposed. The design method takes into account the dissipative behaviour of both the two components (r.c. frame and dampers). With regard to elasticplastic devices, buckling restrained braces (BRBs) are considered, whereas High Damping Rubber (HDR) based devices are considered as viscoelastic devices. The behaviour of HDR is quite complex and both stiffness and damping depend on the strain amplitude and strain rate. Equivalent linear models may however be used to simulate their behaviour at a fixed displacement amplitude and frequency, with an acceptable approximation level.

Type: Proceedings paper
Title: Design methods for existing r.c. frames equipped with elasto-plastic or viscoelastic dissipative braces
Event: XIII National Conference ANIDIS 2009: L'Ingegneria sismica in Italia
Location: Bologna
Dates: 28 June 2009 - 02 July 2009
Open access status: An open access version is available from UCL Discovery
Publisher version: http://www.anidis.it/en/
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: passive seismic protection, high damping rubber, buckling restarined braces, seismic retrofit
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/1574764
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