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Empirical seismic vulnerability assessment of Icelandic buildings affected by the 2000 sequence of earthquakes

Ioannou, I; Bessason, B; Kosmidis, I; Bjarnason, JÖ; Rossetto, T; (2018) Empirical seismic vulnerability assessment of Icelandic buildings affected by the 2000 sequence of earthquakes. Bulletin of Earthquake Engineering , 16 (12) pp. 5875-5903. 10.1007/s10518-018-0413-x. Green open access

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Abstract

In June 2000, two Mw6.5 earthquakes occurred within a 4-day interval in the largest agricultural region of Iceland causing substantial damage and no loss of life. The distance between the earthquake epicentres and the fault rupture was approximately 15 km. Nearly 5000 low-rise residential buildings were affected, some of which were located between the faults and exposed to strong ground motion from both events. The post-earthquakes damage and repair costs for every residential building in the epicentral region were assessed for insurance purposes. The database is detailed and complete for the whole region and represents one of the best quality post-earthquake vulnerability datasets used for seismic loss estimation. Nonetheless, the construction of vulnerability curves from this database is hampered by the fact that the loss values represent the cumulative damage from two sequential earthquakes in some areas, and single earthquakes in others. A novel methodology based on beta regression is proposed here in order to define the geographical limits on areas where buildings sustained cumulative damage and predict the seismic losses for future sequence of events in each area. The results show that the average building loss in areas affected by a single event is below 10% of the building replacement value, whilst this increases to an average of 25% in areas affected by the two earthquakes. The proposed methodology can be used to empirically assess the vulnerability in other areas which experienced sequence of events such as Emilia-Romagna (Italy) in 2012.

Type: Article
Title: Empirical seismic vulnerability assessment of Icelandic buildings affected by the 2000 sequence of earthquakes
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s10518-018-0413-x
Publisher version: https://doi.org/10.1007/s10518-018-0413-x
Language: English
Additional information: © The Author(s) 2018 Open Access: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Keywords: Beta regression, Sequence of earthquakes Empirical vulnerability, Seismic loss, Building-by-building, RC buildings
UCL classification: 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
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 > Dept of Statistical Science
URI: https://discovery.ucl.ac.uk/id/eprint/10053594
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