Hazard Disaggregation and Record Selection for Fragility Analysis and Earthquake Loss Estimation

• Type: Article in International Scientific Journal
• Date: 2017-05

Authors

Luis Sousa (Author) Other; Mário Marques (Author) FEUP; Vitor Silva (Author) Other; Humberto Varum (Author) FEUP

Journal

Title: Earthquake Spectra

Vol. 33 No. 2

Pages: 529-549

ISSN: 8755-2930

Publisher: Earthquake Engineering Research Institute

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 8 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Civil engineering

FOS: Engineering and technology > Civil engineering

Other information

Authenticus ID: P-00R-AZ1

DOI: 10.1193/062016eqs101m

Abstract (EN): Economic losses and collapse probability are critical measures for evaluating the earthquake risk of existing buildings. In this context, this study sheds light on several problems and limitations in current practice of hazard-consistent ground motion selection and fragility analysis, focusing on the impact that (commonly assumed) approximations in disaggregation outputs have on the aforementioned risk metrics, as opposed to an exact solution. These issues are investigated for several building classes, seismicity models and ground motion prediction equations (GMPE), for a site in the city of Lisbon (Portugal). It is observed that only an exact (i.e., rupture-by-rupture) disaggregation can lead to satisfactory results in terms of accuracy, when limit state criteria are not structure-specific. On the other hand, an approximate method is proposed, which still leads to statistically valid results regardless of the chosen structural class, seismicity model or GMPE.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 21