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165 results on '"Dezi, L."'

13. The contribution of ReLUIS to the usability assessment of school buildings following the 2016 central Italy earthquake

Author

DI LUDOVICO, MARCO, BALTZOPOULOS, GEORGIOS, PROTA, ANDREA, DOLCE, MAURO, MANFREDI, GAETANO, Digrisolo, A., Graziotti, F., Moroni, C., Biondi, S., Borri, A., Caprili, S., Carocci, C., Dall’Asta, A., Dezi, L., De Santis, S., Di Fabio, F., Di Sarno, L., Ferracuti, B., Ferretti, D., Fiorentino, G., Ianniruberto, U., Mannella, A., Mazzotti, C., Podestà, S., Riva, P., Sandoli, A., Silvestri, S., Sorrentino, L., Vignoli, A., Magenes, G., Masi, A., DI LUDOVICO, Marco, Digrisolo, A., Graziotti, F., Moroni, C., Baltzopoulos, Georgio, Biondi, S., Borri, A., Caprili, S., Carocci, C., Dall’Asta, A., Dezi, L., De Santis, S., Di Fabio, F., Di Sarno, L., Ferracuti, B., Ferretti, D., Fiorentino, G., Ianniruberto, U., Mannella, A., Mazzotti, C., Podestà, S., Riva, P., Sandoli, A., Silvestri, S., Sorrentino, L., Vignoli, A., Magenes, G., Masi, A., Prota, Andrea, Dolce, Mauro, and Manfredi, Gaetano

Published
2016

14. Assessment survey of public school buildings after august 2016 Italy earthquake: preliminary results

Author

Abruzzese, D., Bergami, A., Biondi, S., Camata, G., Canciani, M., Carbonari, S., Cimino, A., Dall'Asta, Andrea, Dezi, F., Dezi, L., Di Fabio, F., Ferracuti, B., Fiorentino, G., Forte, A., Fragiacomo, M., Gara, F., Ianniruberto, U., Imperatore, S., Lavorato, D., Leoni, Graziano, Liberatore, D., Liberatore, L., Mannella, A., Martinelli, A., Mutignani, C., Nuti, C., Paolacci, F., Pagano, E., Rasulo, A., Santini, S., Sorrentino, L., Vanzi, I., and Zucconi, M.

Subjects
ASSESSMENT SURVEY, EARTHQUAKE, SCHOOL BUILDINGS
Abstract

The seismic events which hit Central Italy on 24 August, October 26 and October 30 2016 have caused casualties and major damage mostly to buildings and architectural heritage of the Italian Regions of Abruzzo, Lazio, Marche and Umbria; the most deadly events occurred on August 24, 2016 and caused a total of 298 victims and about 4.600 people evacuated. The mainshock occurred at 3:36 am with epicenter close to Accumoli (Rieti province) and a magnitude Mw 6.0; the aftershock occurred at 4.33 am with epicenter close to Norcia (Perugia province) and a magnitude Mw 5.3. Most of the victims were in the areas of Amatrice (Ri), Accumoli (Ri) and Arquata del Tronto (AP). The earthquakes of October 30 didn't cause any victim but only some injured thanks to the fact that people was already evacuated and also because the Civil Protection was already present on the territory. Nevertheless, the impact of this seismic event was destructive; many small towns and villages, which have survived to the first earthquake, were heavily damaged. In the days following the earthquake of august 24 the Department of Civil Protection and RELUIS started the usability surveys by using the Aedes form (Italian acronym for "accessibility and damage during seismic emergency" [1]) which guides the inspector to rapidly assess the usability of a structure, including the description of damage and all the details of the building.

Published
2017

16. Prestress force effect on vibration frequency of concrete bridges

Author

Dall'Asta, A. and Dezi, L.

Subjects
Bridges, Concrete -- Analysis, Prestressed concrete construction -- Analysis, Frequency response (Dynamics) -- Analysis, Vibration tests -- Analysis, Engineering and manufacturing industries, Science and technology
Abstract

A previous experiment concluded that the prestress force has no significant effect on the vibration frequency of concrete bridges and that the resulting variations in the natural frequency were caused by shrinkage cracking. There are several engineers who disagree with this conclusion, saying that the equation used for the analysis of prestress force is only applicable to the analysis of external compressive force.

Published
1996

20. Failure mechanisms of externally prestressed composite beams with partial shear connection

Author

Dall'Asta, Andrea, Leoni, Graziano, and Dezi, L.

Subjects
Materials science, business.industry, Metals and Alloys, Building and Construction, Structural engineering, Ritz method, Shear (sheet metal), Displacement field, Slab, Shear strength, Virtual work, business, Slipping, Beam (structure), Civil and Structural Engineering
Abstract

This paper proposes a model for analysing the non-linear behaviour of steel concrete composite beams prestressed by external slipping cables, taking into account the deformability of the interface shear connection. By assuming a suitable admissible displacement field for the composite beam, the balance condition is obtained by the virtual work principle. The solution is numerically achieved by approximating the unknown displacement functions as series of shape functions according to the Ritz method. The model is applied to real cases by showing the consequences of different connection levels between the concrete slab and the steel beam. Particular attention is focused on the limited ductility of the shear connection that may be the cause of premature failure of the composite girder.

Published
2002
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