Di Sarno, L;
Wu, JR;
Gutiérrez-Urzúa, F;
Freddi, F;
D'Aniello, M;
Kwon, OS;
Bousias, S;
(2020)
Dynamic response of existing steel frames with masonry infills under multiple earthquakes.
In: Papadrakakis, M and Fragiadakis, M and Papadimitriou, C, (eds.)
EURODYN 2020 Proceedings of the XI International Conference on Structural Dynamics.
(pp. pp. 3671-3685).
European Association for Structural Dynamics: Athens, Greece.
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Abstract
Existing steel moment-resisting frames in several seismic regions worldwide are often characterised by high vulnerability to earthquakes due to insufficient local and/or global ductility. Therefore, it is of paramount importance to assess their response under strong motions and provide cost-effective retrofitting remedies. However, the current code-based assessment framework utilized in Europe for assessing existing structures is inadequate and requires improvement, especially to account for the contribution of masonry infills as they significantly influence the seismic response of steel buildings. To this end, the H2020-INFRAIA-SERA project HITFRAMES (i.e., Hybrid Testing of an Existing Steel Frame with Infills under Multiple Earthquakes) aims at experimental evaluation of a case study building representative of non-seismically designed European steel frames. This paper presents the dynamic response analyses of the case study building and serves as a theoretical prediction of the experimental results for HTTFRAMES. The case study building is analysed as a bare, an infilled and a retrofitted frame with buckling restrained braces (BRBs), respectively. It is subjected to the natural seismic sequence recorded during the 2016-2017 Central Italy earthquakes. The modal properties of the case study building are determined first, followed by the investigation of its non-linear dynamic response. The dynamic tests are performed with the earthquake records scaled to different intensity levels to simulate the structural performance under different limit states according to Eurocode 8-Part 3. The impact of masonry infills and BRB-retrofit is also investigated by comparing the response of models with different configurations. It can be concluded that appropriately-designed BRBs are effective in protecting steel frames from experiencing critical damage during earthquakes and reducing significantly the transient and residual drift.
| Type: | Proceedings paper |
|---|---|
| Title: | Dynamic response of existing steel frames with masonry infills under multiple earthquakes |
| Event: | XI International Conference on Structural Dynamics |
| ISBN-13: | 9786188507210 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://generalconferencefiles.s3-eu-west-1.amazon... |
| Language: | English |
| Additional information: | © 2020 European Association for Structural Dynamics. All rights reserved. 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 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/10120846 |
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