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TitleSeismic damage assessment of Quebec stone masonry buildings based on macro-elements modelling
 
AuthorKraiem, M H; Nollet, M -J; Abo El Ezz, AORCID logo; Khaled, A
Source12th Canadian Conference on Earthquake Engineering papers; 2019 p. 1-8 Open Access logo Open Access
LinksOnline - En ligne (PDF, 968 KB)
Image
Year2019
Alt SeriesNatural Resources Canada, Contribution Series 20190131
Meeting12th Canadian Conference on Earthquake Engineering / 12e Conférence canadienne du génie parasismique; Québec, QC; CA; June 17-20, 2019
DocumentWeb site
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceQuebec
NTS21L/14
Lat/Long WENS -71.5000 -71.0000 47.0000 46.7500
Subjectsgeophysics; Health and Safety; Science and Technology; seismology; earthquake damage; modelling; building stones; seismic risk; earthquake risk; Heritage buildings
Illustrationssketches; photographs; models; flow diagrams; tables; graphs; bar graphs
ProgramPublic Safety Geoscience Quantitative risk assessment
Released2019 06 01
AbstractStrong earthquakes generally lead to significant economic and social damage emphasizing the importance of seismic assessment of existing buildings and definition of mitigation measures. Old unreinforced masonry (URM) structures were primarily designed as gravity load systems and are known to be among the most vulnerable to earthquakes. Evaluation of the lateral resistance of those URM structures is a key element in predicting damage for seismic risk studies and defining strengthening strategies. However, the response of these buildings to seismic loads is non-linear, due to the progressive evolution of cracks in the mortar joints or the masonry blocks. This increases the difficulty in developing a coherent analytical model. Solutions were proposed to overtake this issue including sophisticated finite element models and simplified macro-element model based on idealization of the building as an equivalent frame. The latter solution represents an appropriate option for the evaluation of the seismic force-deformation capacity curves of several buildings with reasonable computational effort. These curves can then be compared to displacement threshold of different damage states to develop fragility functions representing the probability of damage given multiple levels of seismic intensity. The objective of this study is to develop seismic fragility functions for damage assessment of typical two storeys unreinforced stone masonry buildings located in the historical sector of Old Quebec City. Pushover analyses, using a macro-element model implemented in the software 3-Muri©, were conducted to derive the capacity curves of selected prototype buildings. Mechanical and geometric parameters were varied to obtain the median and dispersion in the capacity curve. Fragility functions were then generated using threshold displacement values, related to four damage states, taken from literature experimental data. The developed fragility functions are intended for use in regional scale damage assessment of earthquake scenarios.
Summary(Plain Language Summary, not published)
Strong earthquakes generally lead to significant economic and social damage emphasizing the importance of seismic assessment of existing buildings and definition of mitigation measures. Old unreinforced masonry (URM) structures were primarily designed as gravity load systems and are known to be among the most vulnerable to earthquakes. Evaluation of the seismic fragility of those URM structures is a key element in seismic risk assessment studies.
GEOSCAN ID314814

 
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