Scenario-based seismic risk assessment for Malawi using improved information on earthquake sources and local building characteristics

Katsu Goda, Panos Kloukinas, Raffaele De Risi, Michael Hodge, Innocent Kafodya, Ignasio Ngoma, Juliet Biggs, Adam Crewe, Ake Fagereng, John Macdonald

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Abstract

This study presents scenario-based seismic hazard and risk assessments for Malawi using improved information on earthquake sources and local building characteristics. A case study is focused upon areas near the Bilila-Mtakataka Fault (south of Lake Malawi). The Bilila-Mtakataka Fault is approximately 130-km long, and six segments can be identified along the scarp, which might rupture individually or altogether. The earthquake source models take into account different rupture scenarios in terms of fault geometry and earthquake
magnitude. To represent current building stock in the target region, building surveys are conducted to develop a realistic seismic risk model. Moreover, seismic fragility models for typical masonry buildings in Malawi are developed based on pushover analysis of finite-element models. Finally, all improved model components are integrated to carry out the seismic hazard and risk assessments in Central-Southern Malawi. The new seismic hazard and risk assessments will inform the baseline seismic risk more accurately.
Original languageEnglish
Title of host publicationRecent Advances in Earthquake Engineering in Europe
Subtitle of host publicationProceedings of the 16th European Conference on Earthquake Engineering
PublisherSpringer, Cham
Number of pages12
ISBN (Electronic)9783319757414
ISBN (Print)9783319757407
DOIs
Publication statusPublished - 22 Jun 2018
Event16th European Conference on Earthquake Engineering: Thessaloniki - 2018 - Thessaloniki, Greece
Duration: 18 Jun 201821 Jun 2018
Conference number: 16
http://www.16ecee.org/

Publication series

NameGeotechnical, Geological, and Earthquake Engineering
PublisherSpringer Verlag
Number1
Volume46
ISSN (Print)1573-6059

Conference

Conference16th European Conference on Earthquake Engineering
Abbreviated title16ECEE
CountryGreece
CityThessaloniki
Period18/06/1821/06/18
Internet address

Structured keywords

  • PREPARE

Keywords

  • Malawi; Seismic hazard and risk; Earthquake fault; Building survey; Masonry buildings

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    Goda, K., Kloukinas, P., De Risi, R., Hodge, M., Kafodya, I., Ngoma, I., Biggs, J., Crewe, A., Fagereng, A., & Macdonald, J. (2018). Scenario-based seismic risk assessment for Malawi using improved information on earthquake sources and local building characteristics. In Recent Advances in Earthquake Engineering in Europe: Proceedings of the 16th European Conference on Earthquake Engineering (Geotechnical, Geological, and Earthquake Engineering; Vol. 46, No. 1). Springer, Cham. https://doi.org/10.1007/978-3-319-75741-4