Freddi, Fabio;
Di Sarno, Luigi;
D’Aniello, Mario;
Kwon, Oh-Sung;
Landolfo, Raffaele;
Bousias, Stathis;
Wu, Jingren;
... Strepelias, Elias; + view all
(2024)
Seismic retrofitting of steel MRFs with external BRBs: preliminary experimental and numerical results.
In:
Proceedings of the 18th World Conference on Earthquake Engineering (WCEE2024).
International Association for Earthquake Engineering: Milan, Italy.
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Abstract
The use of buckling-restrained braces (BRBs) represents an effective retrofit strategy to significantly improve the seismic performance of existing structures. BRBs can be included within the existing frames, creating an additional load path and contributing to their strength, stiffness, and energy dissipation capacity. However, BRBs are typically placed inside the structural frame mesh, thus requiring the demolition and reconstruction of non-structural components to be installed. The present study explores the seismic retrofitting of existing steel structures, considering an external placement of the BRBs to minimise the intervention’s invasiveness and, consequently, business interruptions and indirect losses. A two-storey steel momentresisting frame (MRF) designed primarily for gravity loads and retrofitted with BRBs placed externally to the frames was considered as case study. The research includes large-scale Pseudo-Dynamic (PsD) tests performed as part of the HITFRAMES (i.e., HybrId Testing of an Existing Steel Frame with Infills under Multiple EarthquakeS) SERA project. The experimental results provided significant insights into the seismic response of the retrofitted structure and allowed the calibration of advanced 3D Finite Element (FE) models in ABAQUS. The results provide insights into the effective implementation of this retrofit solution and the influence of BRBs eccentricity to the seismic response.
| Type: | Proceedings paper |
|---|---|
| Title: | Seismic retrofitting of steel MRFs with external BRBs: preliminary experimental and numerical results |
| Event: | 18th World Conference on Earthquake Engineering (WCEE2024) |
| Location: | Milan |
| Dates: | 30 Jun 2024 - 5 Jul 2024 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://proceedings-wcee.org/index.html |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Inst for Risk and Disaster Reduction |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10195530 |
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