Assigning the macroseismic vulnerability classes to strengthened Ordinary masonry buildings: An Update from extensive data of the 2016 Central Italy earthquake

2021 ◽  
pp. 102318
Author(s):  
Ylenia Saretta ◽  
Luca Sbrogiò ◽  
Maria Rosa Valluzzi
Keyword(s):  
Central Italy ◽  
Masonry Buildings ◽  
Extensive Data ◽  
Central Italy Earthquake

scholarly journals MASONRY IN PARALLEL. A KNOWLEDGE BASED STRATEGY POST CENTRAL ITALY EARTHQUAKE 2016

2020 ◽  
Vol XLIV-M-1-2020 ◽  
pp. 3-9
Author(s):  
C. Braucher ◽  
E. Currà
Keyword(s):  
Central Italy ◽  
Field Research ◽  
Masonry Buildings ◽  
Knowledge Based ◽  
Central Italy Earthquake ◽  
Survey Form ◽  
Umbria Region ◽  
Post Traumatic ◽  
New Form

Abstract. This research aims to propose a classification of masonry typologies in Central Italy after the earthquakes that in 2016 involved about 120 municipalities. This territory, since several decades, presents high fragility features due to the depopulation process that increase the vulnerability and risk degree. This condition affects even the maintenance practices of traditional buildings by the inhabitants and the extraordinary post-traumatic situation acts as an accelerating factor of the abandonment. In this article we will explain deeply the first part of the research, focusing in particular on methods and tools that were defined and used to carry out this study. The research highlights the need of a specific comparative tool for masonry facades classification. This was elaborated through the comparison of existed bibliography as the EMS-98, the Aedes schedules and the local classification by Umbria Region and the De Meo book. The result then is the production of another synoptic map that would simplifies the correlation between different approaches to classification and the censed facades. Moreover, it was elaborated a second synoptic map moving from the analyses of many survey forms already discuss in literature. The result of this comparison is a new survey form to carry out the field research on vernacular masonry buildings. This new form focuses on the characteristics of the buildings that the research aims to study in Central Italy. The two tools that are illustrate in the following paper were applied on one hundred survey of masonry buildings carried out during August 2018. The last part of this paper proposes a statistical analysis of the results of the field research.

scholarly journals Intervention Strategies for the Seismic Improvement of Masonry Buildings Based on FME Validation: The Case of a Terraced Building Struck by the 2016 Central Italy Earthquake

Buildings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 404
Author(s):  
Maria Rosa Valluzzi ◽  
Luca Sbrogiò ◽  
Ylenia Saretta
Keyword(s):  
Central Italy ◽  
Intervention Strategies ◽  
Masonry Walls ◽  
Masonry Buildings ◽  
Damage Pattern ◽  
Central Italy Earthquake ◽  
Kinematic Analyses ◽  
Nonlinear Static ◽  
Macro Element ◽  
Parametric Analyses

Residential masonry buildings represent a large stock among highly vulnerable structures in medium–high seismic hazard areas, often built without any anti-seismic provisions. Their rehabilitation and/or strengthening according to optimised intervention strategies is topical and may contribute to revaluating zones characterized by depopulation phenomena. In this paper, a terraced building struck by the 2016 Central Italy earthquake is analysed through a frame by macro element (FME) model. The building is composed of six two-storey units made of stone and clay block masonry walls and semi-rigid diaphragms. The numerical model was calibrated based on the damage pattern caused by the earthquake and then used to carry out parametric analyses on the strengthened conditions by simulating both one unit and the entire terrace. The effects of interventions applied to either vertical or horizontal components, both singularly and in combination, were analysed in terms of nonlinear static analyses, and quantified by a performance factor, according to the upgraded seismic code in Italy. Kinematic analyses also completed the assessment of the building. Results compared the capacity of interventions in attaining the targets defined for improvement at both local and overall levels.

scholarly journals Parametric Analysis on Local Mechanisms of Masonry Churches in Teramo (Italy)

Heritage ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 176-197
Author(s):  
Generoso Vaiano ◽  
Antonio Formisano ◽  
Francesco Fabbrocino
Keyword(s):  
Parametric Analysis ◽  
Central Italy ◽  
Horizontal Load ◽  
Masonry Buildings ◽  
Central Italy Earthquake ◽  
Collapse Mechanisms ◽  
Out Of Plane ◽  
Kinematic Analyses ◽  
Analytical Procedures ◽  
Masonry Churches

Local collapse mechanisms related to the out-of-plane response of walls are commonly observed in existing masonry buildings subjected to earthquakes. In such structures, the lack of proper connections among orthogonal walls and between walls and floors does not allow a global box-type behaviour of the building to develop, which would be governed by the in-plane response of walls. In this paper, parametric linear kinematic analyses on the main local mechanisms of masonry churches were performed with the aim to evaluate the corresponding horizontal load multipliers. This study was conducted on 12 masonry churches, located in Teramo (Italy) and affected by the 2016 Central Italy earthquake, whose main out-of-plane collapse mechanisms, namely facade overturning, vertical bending, corner overturning and roof gable wall overturning, have been analysed. For each mechanism, parametric analysis was carried out on varying heights and thicknesses of walls. Firstly, the acceleration values activating the considered mechanisms were calculated in order to conduct checks prescribed by the current Italian standard. Subsequently, on the basis of the obtained results, simple analytical procedures to determine load collapse multiplier for each mechanism were drawn. Finally, ranges of suitable values of both the thickness and height of walls were found in order to always satisfy seismic checks.

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