Lettieri, A;
Di Benedetto, S;
Dell’Acqua, BN;
Freddi, F;
Latour, M;
Rizzano, G;
(2024)
Optimal Placement of Damage-Free Self-centring Links in Steel EBFs.
In: Mazzolani, Federico M and Piluso, Vincenzo and Nastri, Elide and Formisano, Antonio, (eds.)
Proceedings of the 11th International Conference on Behaviour of Steel Structures in Seismic Areas: STESSA 2024 - Volume 2.
(pp. pp. 311-322).
Springer: Cham, Switzerland.
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Abstract
Low-damage self-centring steel structures have been proposed over the last few decades as seismic-resistant frames capable of achieving seismic resilience during strong earthquakes. Recently, the authors proposed a damage-free self-centring link as an innovative seismic link in steel eccentrically braced frames and proved its effectiveness through experimental and numerical analyses. However, there is a lack of generalised design recommendations for self-centring structures, and follow-up studies showed that their peak deformations are increased compared to conventional structures. This study investigates the opportunity to optimise the location of SC-links in EBFs to enhance the seismic performance of structures in terms of both peak and residual deformations. A 6-story, 3-bay case-study structure has been designed and successively upgraded with SC-links. Numerical models have been developed in OpenSees, and Incremental Dynamic Analyses have been performed to investigate and compare their seismic performance. The seismic responses of the case-study structures equipped with different SC-links layouts have been successively evaluated, providing some considerations regarding their optimal distributions. A Genetic Algorithm implemented in Matlab, interfacing with OpenSees for Non-Linear Time-History Analyses, has been validated using a Brute-Force Approach. The results demonstrate that integrating a limited number of SC-links in steel EBFs can enhance their seismic performance, highlighting the efficiency of the proposed GA.
| Type: | Proceedings paper |
|---|---|
| Title: | Optimal Placement of Damage-Free Self-centring Links in Steel EBFs |
| Event: | 11th International Conference on Behaviour of Steel Structures in Seismic Areas (STESSA 2024) |
| ISBN-13: | 978-3-031-62887-0 |
| DOI: | 10.1007/978-3-031-62888-7_28 |
| Publisher version: | https://doi.org/10.1007/978-3-031-62888-7_28 |
| 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. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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/10195532 |
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