Elettore, E;
Freddi, F;
Latour, M;
Rizzano, G;
(2019)
Seismic Resilient Steel Frames Equipped with Self-Centering Column Bases with Friction Devices.
In:
Conference on Earthquake & Civil Engineering Dynamics (SECED 2019) Proceedings.
SECED: London, UK.
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Abstract
In the last two decades many researchers focused on the development of innovative building structures with the aim of achieving seismic resilience. Among others, steel Moment Resisting Frames (MRFs) equipped with friction devices in beam-to-column joints have emerged as an effective solution able to dissipate the seismic input energy while also ensuring the damagefree behaviour of the system. However, to date, little attention has been paid to their column bases, which represent fundamental components in order to achieve resilience. In fact, column bases designed by current conventional approaches lead to significant seismic damage and residual drifts leading to difficult-to-repair structures. This work assesses the seismic performance of steel MRFs equipped with an innovative damage-free, self-centering, rocking column base joints, developed in accordance with the aims of the European project FREEDAM. The proposed column base consists of a rocking splice joint where the seismic behaviour is controlled by a combination of friction devices, providing energy dissipation capacity, and pre-loaded threaded bars with disk springs, introducing restoring forces in the joint. The design procedure of the column base is presented, a numerical OpenSees model is developed to simulate the seismic response of a perimeter seismic-resistant frame, including the hysteretic behaviour of the connection. Non-linear dynamic analyses have been carried out to investigate the effectiveness of the column base in protecting the first storey columns from yielding and reducing the residual storey drifts. The results show that the damage-free behaviour of the column bases is a key requirement when self-centering of MRFs is a design objective.
| Type: | Proceedings paper |
|---|---|
| Title: | Seismic Resilient Steel Frames Equipped with Self-Centering Column Bases with Friction Devices |
| Event: | Conference on Earthquake & Civil Engineering Dynamics (SECED 2019) |
| Location: | London |
| Dates: | 09 September 2019 - 10 September 2019 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://www.seced.org.uk/index.php/proceedings |
| Language: | English |
| Additional information: | The author accepted manuscript is deposited under a Creative Commons Attribution Non-commercial International Licence 4.0 (CC BY-NC 4.0) and any reuse is allowed in accordance with the terms outlined by the licence. To reuse the author accepted manuscript for commercial purposes, permission should be sought by contacting seced@ice.org.uk |
| 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/10087618 |
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