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94 results on '"Buffarini, G."'

1. Push ‘o ver: numerical simulation of the Castel di Lama pushover test through a force-based equivalent frame model

Author

Addessi D., Liberatore D., Sorrentino L., Dudine A., Dall’Asta A., Morici M., Boccamazzo A., De Simone O., Buffarini G., Clemente P., Addessi, D., Liberatore, D., Sorrentino, L., Dudine, A., Dall’Asta, A., Morici, M., Boccamazzo, A., De Simone, O., Buffarini, G., and Clemente, P.

Subjects
masonry, finite element, plastic hinge, masonry, pushover, plastic hinge, finite element, equivalent frame, equivalent frame, pushover, Earth-Surface Processes
Abstract

The experimental pushover test performed on the Castel di Lama building is studied by means of a finite element procedure based on the equivalent frame model with the aim to test the ability of this widespread model to reproduce the experimental results and the collapse mechanisms. Pier and spandrel macroelements are modelled as Timoshenko beams with plastic hinges to take into account shear and bending failures. Assuming the nodes as infinitely rigid and resistant, it is possible to model them by introducing properly sized offsets at the ends of pier and spandrel macroelements. A force-based formulation is adopted for the macroelement, taking advantage of its higher performances in terms of accuracy and efficiency with respect to the classical displacement-based method, and the capability of naturally avoiding shear-locking problems. The response of the building walls, either unreinforced or reinforced, is analysed in terms of resisting forces, story displacements and damage patterns, and compared with the experimental results.

Published
2023

2. Masonry Arch Bridges with Finite Compression Strength Subject to Horizontal Longitudinal Seismic Actions

Author

Clemente P., Saitta F., Ormando C., Buffarini G., Clemente, P., Saitta, F., Ormando, C., and Buffarini, G.

Subjects
no tension material, collapse mechanism, masonry arch bridges, no tension material, limit analysis, collapse mechanism, masonry arch bridges, limit analysis
Abstract

The great diffusion of masonry arch bridges, sometimes of historical interest, requires the development of simple but effective methodologies for a preliminary but reliable evaluation of their static and seismic capacity. In this paper, the behaviour under longitudinal seismic actions is analysed by using the mechanism method. The masonry is supposed to have no tension strength but a rigid–perfect plastic behaviour with finite strength in compression. The arch is subject to permanent loads and to a horizontal acceleration acting in the longitudinal direction, which causes a horizontal inertial loading acting on the arch. Three hypotheses about the effects of the inertial actions of the backfill are considered, which correspond to three different real behaviours. A comprehensive numerical investigation is performed, which allows us to point out the influence of the geometrical and mechanical parameters on the seismic capacity of a masonry arch bridge. The results are given by means of diagrams that can be easily used for a preliminary seismic check of a masonry arch bridge.

Published
2023

6. Ricostruiamo come era e dove era

Author

Bongiovanni G., Buffarini G., Clemente P., Marzo A, Saitta F., Tripepi C., Bongiovanni, Giovanni, Buffarini, G., Clemente, P., Marzo, A, Saitta, F., and Tripepi, C.

Published
2019

12. Isolamento sismico edifici esistenti

Author

Clemente P., Saitta F., Buffarini G., Bongiovanni G., Clemente, P., Saitta, F., Buffarini, G., and Bongiovanni, Giovanni

Published
2019

14. L’isolamento sismico nelle NTC 2018

Author

Clemente P., Bongiovanni G., Buffarini G., Saitta F., Clemente, P., Bongiovanni, Giovanni, Buffarini, G., and Saitta, F.

Published
2018

19. Experimental analysis of the Torlonia building in Avezzano, Italy

Author

Tripepi, C., Saitta, F., Clemente, P., Buffarini, G., Bongiovanni, Giovanni, Tripepi, C., Saitta, F., Clemente, P., Buffarini, G., and Bongiovanni, Giovanni

Subjects
Structural health monitoring, Experimental modal analysi, Experimental modal analysis, Confined masonry
Abstract

Palazzo Torlonia in Avezzano (Italy) is a two-story confined masonry building, constructed according to the code issued after the devastating 1915 earthquake. That code provided concrete confining members around masonry walls and openings. Walls are made of clay bricks with gothic texture, whereas floor slabs are based on mixed concrete and hollow clay blocks. This paper reports the analysis and results of the experimental dynamic tests on the structure, did in year 2016, by means of 24 seismometers, placed at all floors on the structure in three different configurations. Ambient vibration was the excitation source. Data were analyzed in time and frequency. In the first case the planar bidirectional motion of some points on the building were observed for a long time, to obtain initial information regarding the prevalent directions of motion. Analysis in frequency was preliminarily pursued by means of Fast Fourier Transforms (FFTs) and subsequently by the evaluation of the auto and cross Power Spectral Densities (PSDs). They show an energy content in the range 3-20 Hz, with many close peaks. Although the results presented in this paper are not conclusive and data will be investigated in more detail, in general they show the deformability of the floors, which cannot be considered as infinitely rigid in their plane, as is often done in structural analysis of buildings. © 2017 International Conference on Advances in Experimental Structural Engineerin. All rights reserved.

Published
2017

28. Ambient vibration analysis of the aureliana column

Author

Saitta, F., Clemente, P., Buffarini, G., Bongiovanni, G., Saitta, F., Clemente, P., Buffarini, G., and Bongiovanni, Giovanni

Abstract

With the objective of characterizing the dynamic behavior of the Aureliana Column in Rome and evaluating its health status, an ambient vibration survey of the monument was carried out by using nine Kinemetrics seismometers SS-1 connected to one Kinemetrics K2 recorder. Data were analyzed both in time and frequency domain. The analysis showed that the motion was governed by two quite close translational frequencies, equal to 1.24 and 1.3 Hz respectively, and also by a third translational frequency, equal to 6.5 Hz. A rotational frequency, equal to 9.0 Hz was also observed. The analysis of the curves described by the measurement point at the top of the tower gave interesting information about the characteristics of the column vibrations, which does not behave as a whole.

Published
2014

29. The Cochlid Columns in Rome: ambient vibration surveys

Author

Bongiovanni G., Buffarini G., Clemente P., Conti C., Del Monaco F., Durante F., Rovelli A., Saitta F., Serafini S., Tallini M., Valente G., Mazzolani F.M. & Altay G., Bongiovanni, Giovanni, Buffarini, G., Clemente, P., Conti, C., Del Monaco, F., Durante, F., Rovelli, A., Saitta, F., Serafini, S., Tallini, M., and Valente, G.

Published
2014

30. Limit behaviour of partially reinforced masonry arch bridges

Author

BUFFARINI G, CLEMENTE P, SATTA A., DE FELICE, Gianmarco, Buffarini, Giacomo, Clemente, Paolo, Satta, Antonella, DE FELICE, Gianmarco, Lourenço P.B., Oliveira D.V., Portela A., Buffarini, G., Clemente, P., de Felice, G., Satta, A., Buffarini, G, and Clemente, P

Published
2008

31. Retrofitting of masonry arch bridges with FRP

Author

BUFFARINI G., CLEMENTE P., DE FELICE, Gianmarco, Buffarini, G, Clemente, P, DE FELICE, Gianmarco, P.B. Lourenço, P. Roca, C. Modena, S. Agrawal, Buffarini, G., Clemente, P., de Felice, G., and P.Lourenco, P.B. Roca, P. Modena, C. Agrawal

Abstract

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Published
2007

33. Dynamic identification of palazzo marchesale in s. giuliano di puglia

Author

Saitta, F., Rinaldis, D., Clemente, P., Buffarini, G., Bongiovanni, G., Saitta, F., Rinaldis, D., Clemente, P., Buffarini, G., and Bongiovanni, Giovanni

Abstract

Palazzo Marchesale in San Giuliano di Puglia (Italy) is an old masonry structure hosting the new City Hall. It is quite complex and is characterized by several parts with different height and foundation levels, and includes an internal court. After the earthquake of October 31st (ML =5.4) and November 1st, 2002, (ML =5.3), the building was retrofitted and seismic joints were realized between the different buildings, in order to regularize the dynamic behaviour. The structure has been considered for seismic monitoring in the framework of a research project funded by the Office for the reconstruction of San Giuliano di Puglia. Therefore a permanent accelerometric array has been designed and installed. It was tested by deploying also a temporary array in different configurations and recording ambient vibrations and weak motion effects. The experimental results were compared with those obtained by means of a finite element model. Thus, linear and nonlinear analysis allowed to evaluate the seismic safety of the structure. Modal identification and model updating are shown in the paper. © 2013 Taylor & Francis Group, London, UK.

Published
2013

40. Seismic Preservation of Cerreto di Spoleto Historical Centre

Author

Bongiovanni G., Buffarini G., Clemente P., Paciello A., Rinaldis D., Verrubbi V., Martini G., Zini A., Martino S., Clemente P., Di Lazzaro P., Giorgi R., Bongiovanni, Giovanni, Buffarini, G., Clemente, P., Paciello, A., Rinaldis, D., Verrubbi, V., Martini, G., Zini, A., and Martino, S.

Published
2012

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