Lettieri, Annarosa;
Elettore, Elena;
Pieroni, Ludovica;
Freddi, Fabio;
Latour, Massimo;
Rizzano, Gianvittorio;
(2022)
Parametric analysis of steel MRFs with self‐centring column bases.
Steel Construction
, 15
(2)
pp. 91-99.
10.1002/stco.202100050.
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Abstract
Nominated for Eurosteel 2021 Best Paper Award In recent decades, innovative seismic-resilient structural systems have been proposed to reduce the direct and indirect losses related to seismic events. Among others, steel moment-resisting frames (MRFs) equipped with damage-free self-centring column bases (SC-CBs) represent a promising solution. Although several configurations of SC-CBs have been proposed in literature, only a few research studies investigated how the significant parameters (e. g. number of storeys, frame layout, seismic mass, seismic intensity) affect the seismic performance of MRFs with SC-CBs. To further investigate this aspect, the present work focuses on the influence of an additional parameter (i. e. the combination of seismic mass and acceleration) on their self-centring capability. Three 5-bay steel MRFs with 4, 6 and 8 storeys are considered as case-study frames and designed based on two different values of the seismic mass (i. e. M1 and M2). Numerical models are developed in OpenSees, incremental dynamic analyses (IDAs) are performed to monitor global engineering demand parameters (EDPs), and fragility curves are derived to evaluate the seismic performance of the structures. It is observed that the inclusion of SC-CBs produces beneficial effects in terms of increased self-centring capability on all the investigated case studies. Moreover, the parametric analysis allows some preliminary observations to be drawn regarding the influence of the number of stories and seismic mass.
| Type: | Article |
|---|---|
| Title: | Parametric analysis of steel MRFs with self‐centring column bases |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/stco.202100050 |
| Publisher version: | https://doi.org/10.1002/stco.202100050 |
| 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: | structural resilience, steel moment resisting frames, self-centring, damage-free column bases, residual drifts, Steel buildings, Analysis and design, Stahlhochbau, Berechnungs- und Bemessungsverfahren |
| UCL classification: | 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10147643 |
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