A New Methodology for the Survey and Evaluation of Seismic Damage and Vulnerability Entailed by Structural Interventions on Masonry Buildings: Validation on the Town of Castelsantangelo sul Nera (MC), Italy

Vettore, Marco; Saretta, Ylenia; Sbrogiò, Luca; Valluzzi, María Rosa

doi:10.1080/15583058.2020.1766159

Cited by 12 publications

(18 citation statements)

References 12 publications

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“…Another possible intervention is the insertion of tie-beams just at the top or at all levels of a building. According to past Italian seismic codes [30,31] they must have been made of reinforced concrete, but this was recently proved to be more detrimental than beneficial to seismic behavior as a consequence of high weight and poor compatibility with random masonry [19,20,32]. Therefore, a new generation of tie beams was proposed, adopting reinforced masonry or steel structural shapes [33].…”

Section: Improvement Of Connections and Box-like Behaviormentioning

confidence: 99%

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Fragility Curves for Italian Residential Masonry Buildings With Retrofit Interventions

Follador¹,

Donà²,

Carpanese³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The earthquakes of the last decades have shown that the Italian residential masonry built heritage has high seismic vulnerability, in particular when considering structures built before 1919. For this reason, it is necessary to develop effective large-scale risk mitigation strategies in order to reduce the huge losses that could occur in the aftermath of an earthquake. In this paper some retrofit interventions applicable mainly to old buildings are presented, explaining their advantages and potential. These interventions are then implemented, through Vulnus 4.0 software, on a database of 205 buildings built before 1919, previously analyzed in their as-built state. Fragility curves are then developed for each building, and are processed in order to create a vulnerability model for different construction periods that takes into account the possible retrofit intervention strategies. Therefore, this procedure allows a comparison between pre and post retrofit intervention fragility, and the results in terms of curves can be used for large scale damage and risk simulations.

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Section: Improvement Of Connections and Box-like Behaviormentioning

confidence: 99%

“…On the basis of the considerations presented in section 2 and of direct field observations [32,42], some interventions were considered as the most effective for Pre-1919 buildings. These interventions are presented in Table 1.…”

Section: Implementation Of Retrofit Interventionsmentioning

confidence: 99%

Fragility Curves for Italian Residential Masonry Buildings With Retrofit Interventions

Follador¹,

Donà²,

Carpanese³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…joists or cast-in-place ribbed slabs with tie beams chased into the walls or they were reinforced with thin r.c. overlays [21,22]. If vertical structures were not reinforced and therefore, they could not stand the increase of seismic loads, partial interventions are obtained.…”

Section: The Case Studiesmentioning

confidence: 99%

“…However, observations demonstrated that the effectiveness of tie rods is limited by masonry quality at the anchoring (Figure 3a, see also [25]), while r.c. curbs on weak masonries cause crumbling, overturning and sliding of the walls (Figure 3b, c) [21].…”

Section: Some Observations In the Hindsight Of 2016 Seismic Swarm: The Role Of Interventions In Buildings' Seismic Behaviourmentioning

confidence: 99%

A Comparison Between Empirical Procedures for the Definition of Vulnerability Classes of Masonry Buildings: Application to Five Historical Centres Struck by 2016 Central Italy Earthquake

Saretta¹,

Sbrogiò²,

Valluzzi³

2021

12th International Conference on Structural Analysis of Historical Constructions

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The definition of seismic risk scenarios necessarily depends on the attribution of a vulnerability class to each building of a stock. In the macroseismic scale (EMS-98) the vulnerability classfrom A to Fresults from the combination between horizontal and vertical structures. On the basis of post-event surveys carried out in Italy after the earthquakes occurred in the last 50 years, many rules for converting the masonry quality and the stiffness of horizontal diaphragms into a vulnerability class have been proposed. However, despite the now high number of retrofitted or strengthened buildings in Italy, structural interventions are not mentioned in these procedures, except for metal tie rods and r.c. tie beams. The paper proposes a critical approach to the definition of vulnerability classes, by the means of applying the conversion rules to the same sample of 525 masonry buildings located in five

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“…According to the EMS-98 classification, unreinforced masonry buildings (URM) belong to the first four classes (A-D), based on type of structure from rubble stone (A) to massive stone (C) or URM with RC floors (C-D). Nevertheless, it should be noted that solid or hollow clay brick masonry (with or without mortar repointing) which characterize the MUR1, MUR3, and MUR4 types are not included among the specific cases considered by the EMS-98 [6].…”

mentioning

confidence: 99%

A Multilevel Procedure at Urban Scale to Assess the Vulnerability and the Exposure of Residential Masonry Buildings: The Case Study of Pordenone, Northeast Italy

et al. 2020

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More than the 60% of the Italian residential building stock had already been built by 1974, when seismic codes were enforced on a minimal part of the country. Unreinforced masonry buildings represent most of that share, but they are typical for each region, in terms of both materials and structural configurations. The definition of ‘regional’, i.e., more specific, vulnerability and exposure models are required to improve existing forecast models. The research presents a new geographic information system (GIS)-based multilevel procedure for earthquake disaster prevention planning at urban scale; it includes multicriteria analysis, such as architectural types, structural vulnerability analysis, microzonation studies, and socio-economic aspects. The procedure has been applied to the municipality of Pordenone (PN), a district town of the Friuli–Venezia–Giulia region, in Northeast Italy. To assess the urban seismic risk, more than 5000 masonry residential buildings were investigated and common types within sub-municipal areas and exposure data were collected. Simplified mechanical analysis provided a ‘regional’ vulnerability model through typological fragility curves. The integration of results into GIS tool permitted the definition of cross-mapping among vulnerability, damage scenarios (conditional and unconditional) and exposure (seismic losses, casualties, impact), with respect to various earthquake intensities expected in the town. These results are presented at different scales: from the single building, to submunicipal area and to the entire town.

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A New Methodology for the Survey and Evaluation of Seismic Damage and Vulnerability Entailed by Structural Interventions on Masonry Buildings: Validation on the Town of Castelsantangelo sul Nera (MC), Italy

Cited by 12 publications

References 12 publications

Fragility Curves for Italian Residential Masonry Buildings With Retrofit Interventions

Fragility Curves for Italian Residential Masonry Buildings With Retrofit Interventions

A Comparison Between Empirical Procedures for the Definition of Vulnerability Classes of Masonry Buildings: Application to Five Historical Centres Struck by 2016 Central Italy Earthquake

A Multilevel Procedure at Urban Scale to Assess the Vulnerability and the Exposure of Residential Masonry Buildings: The Case Study of Pordenone, Northeast Italy

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