Multi-Directional Seismic Assessment of Historical Masonry Buildings by Means of Macro-Element Modelling: Application to a Building Damaged during the L’Aquila Earthquake (Italy)

Abstract

Abstract:The experience of the recent earthquakes in Italy caused a shocking impact in terms of loss of human life and damage in buildings. In particular, when it comes to ancient constructions, their cultural and historical value overlaps with the economic and social one. Among the historical structures, churches have been the object of several studies which identified the main characteristics of the seismic response and the most probable collapse mechanisms. More rarely, academic studies have been devoted to ancient palaces, since they often exhibit irregular and complicated arrangement of the resisting elements, which makes their response very difficult to predict. In this paper, a palace located in L'Aquila, severely damaged by the seismic event of 2009 is the object of an accurate study. A historical reconstruction of the past strengthening interventions as well as a detailed geometric relief is performed to implement detailed numerical models of the structure. Both global and local models are considered and static nonlinear analyses are performed considering the influence of the input direction on the seismic vulnerability of the building. The damage pattern predicted by the numerical models is compared with that observed after the earthquake. The seismic vulnerability assessments are performed in terms of ultimate peak ground acceleration (PGA) using capacity curves and the Italian code spectrum. The results are compared in terms of ultimate ductility demand evaluated performing nonlinear dynamic analyses considering the actual registered seismic input of L'Aquila earthquake.

Pushover analysis of unreinforced irregular masonry buildings: Lessons from different modeling approaches

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Development of a Data-Mining Technique for Regional-Scale Evaluation of Building Seismic Vulnerability

“…Amid improvements in advanced earthquake engineering as well as computer science, computational structural modeling has served as a powerful tool for assessing buildings' response to ground shaking. Static pushover analysis, for example, provides a practical means for evaluating inelastic structures' displacement responses to earthquakes of given intensities [9][10][11][12]. This type of analysis generates capacity curves, which express seismic capacity in terms of the horizontal displacement of a building under increasing lateral load [13].…”

In-plane retrofitting of masonry structures by using GFRP strips in the Bedjoints

“…Manifested reports from the earthquakes in the past 50 years demonstrated that the vulnerability of URM structures to seismic excitations is much more than other types of structural systems (McGuire and Leyendecker, 1974;NAHB Research Center, 1994;D'Ayala, 2013;NZSEE Part-C8, 2017;Fabbrocino et al, 2019 (NAHB Research Center, 1994;Anagnostopoulos et al, 2004;D'Ayala and Paganoni, 2011;Dizhur et al, 2011;NZSEE Part-C8, 2017). This is while the survived URM structures are severely damaged or exposed to failure (D'Ayala and Paganoni, 2011;Dizhur et al, 2011;Bostenaru-Dan et al, 2013;Papayianni, 2015;Cannizzaro et al, 2017). Many of these structures are monumental buildings that were of value and could be an attraction point for centuries.…”