Gutiérrez-Urzúa, LF;
Di Sarno, L;
Wu, J;
Freddi, F;
D'Aniello, M;
Kwon, O-S;
Bousias, S;
(2020)
Pseudo-Dynamic Testing of Existing Steel Frames With Masonry Infills: Assessment And Retrofitting with BRBs.
In:
Proceedings of the 17th World Conference on Earthquake Engineering (17WCEE).
World Conference on Earthquake Engineering (WCEE): Sendai, Japan.
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Abstract
Many existing steel multi-storey frames in Europe were designed before the introduction of modern seismic design provisions and often exhibit low performances under earthquake loads due to their insufficient stiffness, strength and energy dissipation capacity. In this context, there is a significant need for advanced assessment procedures able to quantify the seismic performance of these structures and to evaluate the need for retrofitting. However, current procedures for the assessment of existing steel structures in Europe, included in the Eurocode 8 Part 3 (EC8-3), has demonstrated to be inadequate and should be revised. Amongst others, particular attention should be paid to the contribution from masonry infill walls as they significantly affect the modal properties and the lateral strength and stiffness of structures. To this end, the HITFRAMES (i.e., HybrId Testing of an Existing Steel Frame with Infills under Multiple EarthquakeS) SERA project, funded under the H2020-SERA Program, experimentally evaluated the seismic performance of a case study structure representative of non-seismically designed steel frames in Europe including the effects of the masonry infills. A retrofitted configuration of the structure, based on the use of buckling restrained braces, is also tested in order to provide information about the effectiveness of this retrofit strategy. This paper illustrates the analyses performed for the design and the assessment of the case study structure and the preliminary results of the tests on the infilled non-retrofitted structure. Non-linear finite element models of the frame have been developed to complement the experiment design and to forecast the outcome of the tests. The building structure is assessed as a bare and infilled frame under the EC8-3 framework by non-linear static analysis and comparisons are made between the two configurations to estimate the influence of the infills. Then, non-linear time history analyses are performed on the infilled non-retrofitted frame, which focus on the forecast of the experimental outcomes with special attention paid to the response of masonry infills. Preliminary comparison between the numerical predictions and experimental outcomes is also performed for assessing the accuracy of the finite-element model.
| Type: | Proceedings paper |
|---|---|
| Title: | Pseudo-Dynamic Testing of Existing Steel Frames With Masonry Infills: Assessment And Retrofitting with BRBs |
| Event: | 17th World Conference on Earthquake Engineering (17WCEE) |
| Location: | Sendai, Japan |
| Dates: | 13 September 2020 - 18 September 2020 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://www.17wcee.jp/ |
| 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. |
| Keywords: | Existing steel frames, masonry infills, buckling restrained braces, seismic response, pseudo-dynamic tests |
| 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/10110653 |
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