Fragility Functions for Tall URM Buildings around Early 20th Century in Lisbon. Part 1: Methodology and Application at Building Level. Issue 3 (4th March 2021)

• Record Type: Journal Article
• Authors: Simões, Ana G.; Bento, Rita; Lagomarsino, Sergio; Cattari, Serena; Lourenço, Paulo B.
• Is Part Of: International journal of architectural heritage. Volume 15:Issue 3(2021)
• Page Start: 349
• Page End: 372
• Publication Date: 2021-03-04
• Subjects: Fragility functions -- non-linear kinematic analysis -- non-linear static analysis -- performance-based assessment -- seismic vulnerability -- unreinforced masonry buildings; Architecture -- Conservation and restoration -- Periodicals; Historic buildings -- Periodicals; Historic preservation -- Planning -- Periodicals; 721.0288
• DOI: 10.1080/15583058.2019.1618974
• Languages: English
• ISSNs: 1558-3058

Abstract

ABSTRACT: The article proposes a procedure for the derivation of fragility functions for unreinforced masonry buildings considering the in-plane and out-of-plane response. Different approaches are considered for the generation of the corresponding fragility functions and for the evaluation of the propagation of uncertainties. The contributions for the dispersion of the fragility functions account for the variability in the definition of the capacity, the aleatory uncertainty in the definition of the seismic demand and the aleatory uncertainty in the definition of the modified/floor response spectrum, when the local mechanisms are located in the upper level of the building. In the end, the individual fragility curves are properly combined in order to define a single fragility curve for the class of buildings. As a case study, the procedure is applied to the assessment of one of the most vulnerable unreinforced masonry buildings constructed in the early 20th century in Lisbon, considering a typical prototype building with five storeys high. Results for a seismic event, as defined in the earthquake-resistant code for Lisbon, indicate that the typical building has about 50% probability of having heavy damage and about 30% probability of collapse.