Simplified Formulations for Estimating the Main Frequencies of Ancient Masonry Churches

López, Saulo Mosquera; D’Amato, Michele; Ramos, Luís F.; Laterza, Michelangelo; Lourenço, Paulo B.

doi:10.3389/fbuil.2019.00018

Cited by 31 publications

(12 citation statements)

References 32 publications

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“…), evaluating possible interactions with adjacent elements. Applications of this approach may be found, among the others, in Betti et al (2018), Brandonisio et al (2013), D'Ayala and Paganoni (2011), Doglioni et al (1994), Formisano and Marzo (2017), Lagomarsino and Podestà (2004a,b), while a recent investigation on the estimation of main frequency of ancient masonry churches may be found in Lopez et al (2019).…”

Section: Seismic Assessment Methods Indicated In the Italian Directivementioning

confidence: 96%

Comparative Seismic Assessment of Ancient Masonry Churches

D’Amato

Gigliotti

Laguardia

2019

Front. Built Environ.

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The seismic risk assessment of the historical and architectural heritage is, nowadays, a very relevant topic due the potential human and economic losses involved in case of global or partial collapse. In order to preserve the inestimable value of such heritage, the prevention and mitigation of the seismic risk is needed and it cannot be postponed. Among the several methods available in the literature to perform vulnerability assessment on cultural heritage, this study focuses on two simplified methods proposed by the current Italian Directive, containing the guide lines for assessment and reduction of cultural heritage seismic risk. Furthermore, a new simplified method is applied, capable at a territorial scale of quickly ranking the seismic behavior of ancient churches. In the paper, the considered evaluation methods are applied to the case study of the Matera Cathedral, named SS. Maria della Bruna. The obtained results are then compared with others of similar ancient churches, all belonging to the historical centre "Sassi of Matera," a site protected by UNESCO having a moderate seismic hazard.

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Section: Seismic Assessment Methods Indicated In the Italian Directivementioning

confidence: 96%

Comparative Seismic Assessment of Ancient Masonry Churches

D’Amato

Gigliotti

Laguardia

2019

Front. Built Environ.

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“…The causes of high vulnerability even at very low levels of seismic forces may be different due, for instance, to structural irregularities, inadequate design, poor quality of materials, absence of constructive details, and scarce maintenance (Krstevska et al, 2010;Betti and Vignoli, 2011;Milani and Valente, 2015a;Clementi et al, 2017a,b;Fonti et al, 2017;Formisano et al, , 2018Milani et al, 2017a;Valente et al, 2017;Luchin et al, 2018;Valente and Milani, 2018a,b,c). After the recent seismic events, many efforts of the scientific community have been done in order to develop appropriate procedures for implementing seismic vulnerability analysis (Formisano, 2017;Formisano and Marzo, 2017;Laterza et al, 2017;Lopez et al, 2019) and specific retrofitting interventions (Faggiano et al, 2009;Terracciano et al, 2015;D'Amato et al, 2017;Milani et al, 2017bMilani et al, , 2018. In particular, as previously introduced, recurrent seismic damages were observed in historic masonry buildings characterized by local out-of-plane and in-plane response mechanisms regarding one or more isolated structure portions (Lagomarsino and Podestà, 2004;Formisano et al, 2010;Leite et al, 2013;Gattulli et al, 2014;Milani and Valente, 2015b;Stockdale, 2016;Valente et al, 2016;Betti et al, 2018;De Matteis et al, 2019;Fuentes et al, 2019b;Penna et al, 2019;Ramirez et al, 2019).…”

Section: Seismic Vulnerability and Risk Of Historical Constructionsmentioning

confidence: 99%

Large-Scale Seismic Vulnerability and Risk of Masonry Churches in Seismic-Prone Areas: Two Territorial Case Studies

Fabbrocino

Vaiano

Formisano

et al. 2019

Front. Built Environ.

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In this paper, seismic vulnerability and risk assessment of two samples of churches, located in Teramo and Ischia island (Naples gulf), both affected by the most recent earthquakes that occurred in Italy, are presented. To this aim, we applied a simplified method particularly suitable for seismic evaluations at a territorial scale, providing a global resulting score to be compared among the cases analyzed. The data obtained allowed us to provide vulnerability maps and a seismic risk index for all the considered churches. In addition, the calculated indexes permit a preliminary health state evaluation of the inspected churches, for ranking the priorities and planning additional in-depth evaluations.

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“…For these mechanisms, there is a wealth of literature references aimed at calculating the ultimate load factors by means of limit analysis, especially with kinematic approaches considering frictional behaviour [3][4][5][6][7][8][9][10][11][12]. In the last few decades, researchers have also developed analytical methods in the field of finite element (FE) analyses to examine ordinary masonry constructions [13][14][15][16][17] or have implemented large scale and detailed numerical investigations to study monumental constructions like churches [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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

2020

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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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Simplified Formulations for Estimating the Main Frequencies of Ancient Masonry Churches

Cited by 31 publications

References 32 publications

Comparative Seismic Assessment of Ancient Masonry Churches

Comparative Seismic Assessment of Ancient Masonry Churches

Large-Scale Seismic Vulnerability and Risk of Masonry Churches in Seismic-Prone Areas: Two Territorial Case Studies

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

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