Development of fragility curves for confined masonry buildings in Lima, Peru

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Lovon H.
Tarque N.
Silva V.
Yepes-Estrada C.
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Earthquake Engineering Research Institute
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This paper aims at investigating the seismic fragility of confined masonry (CM) structures in Lima, Peru, which can be used to perform earthquake scenarios at urban scale. A database describing the geometric properties (walls density, building area, height) of this type of structure was developed using data from field surveys. This information was complemented with results from experimental tests to compute a large set of capacity curves using a mechanical procedure. These models were tested against a set of ground motion records using the displacement-based earthquake loss assessment (DBELA) procedure, and the structural responses were used to derive fragility functions for four building classes. The resulting fragility curves were convoluted with seismic hazard curves to evaluate the annualized expected loss ratio and annual collapse probability.
The authors wish to express their gratitude to the Pontifical Catholic University of Peru (PUCP), to the National Council of Science, Technology and Technological Innovation (CONCYTEC) in the framework of the 027-2015-FONDECYT agreement, and to the Global Earthquake Model (GEM). To all these institutions for the financial aid, without this work could not have achieved. Also, the authors appreciate the support and guidance of Dr. Marcial Blondet, who provided the results of the buildings’ surveys.
Palabras clave
Structural response, Masonry materials, Collapse probabilities, Displacement-Based, Earthquake scenario, Geometric properties, Seismic fragility, Earthquakes