Abstract
Many historic buildings in old urban centers in Eastern Canada are made of stone masonry reputed to be highly vulnerable to seismic loads. Seismic risk assessment of stone masonry buildings is therefore the first step in the risk mitigation process to provide adequate planning for retrofit and preservation of historical urban centers. This paper focuses on development of analytical displacement-based fragility curves reflecting the characteristics of existing stone masonry buildings in Eastern Canada. The old historic center of Quebec City has been selected as a typical study area. The standard fragility analysis combines the inelastic spectral displacement, a structure-dependent earthquake intensity measure, and the building damage state correlated to the induced building displacement. The proposed procedure consists of a three-step development process: (1) mechanics-based capacity model, (2) displacement-based damage model and (3) seismic demand model. The damage estimation for a uniform hazard scenario of 2% in 50 years probability of exceedance indicates that slight to moderate damage is the most probable damage experienced by these stone masonry buildings. Comparison is also made with fragility curves implicit in the seismic risk assessment tools Hazus and ELER. Hazus shows the highest probability of the occurrence of no to slight damage, whereas the highest probability of extensive and complete damage is predicted with ELER. This comparison shows the importance of the development of fragility curves specific to the generic construction characteristics in the study area and emphasizes the need for critical use of regional risk assessment tools and generated results.
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Supported by: Natural Resources Canada — Geological Survey of Canada Public Safety Geoscience Program, and the Chemical, Biological, Radiological-Nuclear and Explosives Research and Technology Initiative, administered by the Defence R&D Canada — Centre for Security Science
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Abo-El-Ezz, A., Nollet, MJ. & Nastev, M. Seismic fragility assessment of low-rise stone masonry buildings. Earthq. Eng. Eng. Vib. 12, 87–97 (2013). https://doi.org/10.1007/s11803-013-0154-4
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DOI: https://doi.org/10.1007/s11803-013-0154-4