Elena Manzoni (2021) Vulnerabilidades Sísmicas no estructurales en Centros Históricos: Entre las instancias de seguridad y de conservación. , Sociedad de Urbanistas del Perù.
La vulnerabilidad frente a los sismos en los Centros Históricos es un tema actual. Los daños en elementos no estructurales son frecuentes. Se presentan ejemplos de daños en centros históricos. Se delinean criterios de intervención, instancias de seguridad y conservación. Se concluye con propuestas para el futuro.
E Manzoni, F Casarin, S Dandria, A Dusi, M Giamello, E Giorgi, F Gabbrielli (2018) The Medieval Grange of Cuna – Siena (Italy)- Interdisciplinary Studies on Masonry Structures. RILEM 2019 R. Aguilar et al. (Eds.): Structural Analysis of Historical Constructions, RILEM Bookseri, 11th SAHC, Cusco, September 11th-13th 2018, pp. 2350–2358.
A team of specialist in different subject worked together with a multidisciplinary approach for the conservation of the complex of the Grange of Cuna, the administrative and storage center of the bigger farm of Santa Maria della Scala Hospital in Siena (Italy) in Middle Ages. Laser scanner surveys, archival and bibliographic researches, stratigraphic surveys, structural surveys were carried on and studied by the members of the team on the complex of 167 rooms. The results obtained by specialist approach was frequently discussed and compared in order to obtain a deeper knowledge of the complex of buildings.
Structural engineer studies concerned the identification of different typologies of masonry and the structural diagnostics to mechanical characterization. Double flat jack and sonic inspection were performed on tapial adobe, brick masonry with lime and mud mortar.
H. Ahmadi, A. Dusi, J. Gough (2017) A Rubber-Based System for Damage Reduction in Infill Masonry Walls. Proceedings of 16th WCEE, Santiago del Chile - Jan. 9-13, 2017.
The paper describes an innovative composite rubber/masonry infill for minimizing earthquake damage to the masonry as well as controlling the seismic performance of the R.C. moment resisting structures by offering auxiliary energy dissipating capability to the building.
T.T. Or, P.L.Y. Tiong, A. Dusi (2017) A New Generation of High Damping Natural Rubber Bearings: Material Development, Testing and Applications. Proceedings of 16th WCEE, Santiago del Chile - Jan. 9-13, 2017.
This paper reports on the research and development activities carried out for the development of a new material, based on natural rubber, specially formulated to give a hysteresis damping of minimum 22% at design shear strain.
A. Dusi, M. Mezzi, T.T. Or (2017) Base Isolation in Seismic Retrofitting of R/C Buildings. Proc. ASEA-SEC-3 Conference: Integrated solutions for Infrastructure Development, ISBN: 978-0-9960437-3-1, Kuching, Sarawak, Malaysia, Oct. 31-Nov. 4, 2106.
The paper deals with the retrofitting of r/c buildings damaged by the earthquake adopting the base-isolation.
L. Peruzza, A. Saraò, C. Barnaba, P.L. Bragato, A. Dusi, S. Grimaz, P. Malisan, M. Mucciarelli, D. Zuliani and C. Cravos (2016) Teach & Learn seismic safety at high school: the SISIFO project. Bollettino di Geofisica Teorica ed Applicata DOI 10.4430/bgta0157, Vol. 57, n. 2, pp. 129-146; June 2016, .
M. Giamello, F. Fratini, S. Mugnaini, E. Pecchioni, F. Droghini, F. Gabbrielli, E Giorgi, E. Manzoni, F. Casarin, A. Magrini, F. Randazzo (2015) Earth Masonries in the Medieval Grange of Cuna – Siena (Italy). CIAT2015 Journal of Materials and Environmental Science, Marrakech, 7(10), 3509-3521.
The Grange of Cuna was the administrative and storage centre of the bigger farm of Santa Maria della Scala Hospital in Siena. Built from the early 14th century, the Grange is characterized by continuous development of the building until the second half of the 18th century. For his extraordinary state of preservation, its size and the internal organization of individual buildings, it is notable for being one of the finest and rare examples of fortified farm in the context of Italian and European Middle Ages. At present a plan of restoration is under preparation, for whose completion many studies have been performed. The architectural survey, thanks to the accuracy of laser scanner technology added to a critical interpretation and data processing, represented the first knowledge of spatial and geometrical information and also gave a model useful to identify structural instabilities and deformations in order to direct the diagnostic phase. The stratigraphic investigations extended over the entire architectural complex made it possible to distinguish the historical constructive phases of the farm. Among the different masonries, fired brick masonries with earthen bedding mortars have been found in the original medieval nucleus, while rammed earth masonries plastered with lime mortar are present in some late medieval or post-medieval additions. Specific “in situ” investigations such as sonic and double flat jack tests were carried out on each masonry typology. Samples from the masonries with earthen bedding mortar and rammed earth were characterized in their mineralogical and petrographic features. This paper represents a first indication and reports a thorough investigation of walls built with earthy materials in this important medieval complex in Tuscany. Keywords: Earth masonry, Medieval building, Grange, Stratigraphic investigation, Mineralogical petrographic characterization, Mechanical test.
M. Forni, A. Poggianti, R. Scipinotti, A. Dusi, E. Manzon &, M.G. Castellano (2015) Seismic-Initiated Event Risk Mitigation in Lead-Cooled Reactors: Main Results of the Siler Project. Proc. SECED 2015 Conference "Earthquake Risk and Engineering towards a Resilient World", Cambridge UK, 9-10 July, 2015.
This paper gives a general overview of SILER, a Collaborative Project funded within the 7th EC Framework Programme, aimed at studying the risks associated with seismic initiated events in Generation IV Heavy Liquid Metal reactors and developing adequate protection measures. In SILER, the attention is focused on the evaluation of the effects of earthquakes, with particular regard to unexpected (beyond design) events, and to the identification of mitigation strategies like seismic isolation. Specific sections of the paper are addressed to the design, development and testing of the isolators (High Damping Rubber Bearings and Lead Rubber Bearings) and the most critical interface devices like flexible joints for pipelines and joint-cover of the seismic gap.
MG Castellano, A Dusi, A Poggianti (2015) TESTING OF HIGH DAMPING RUBBER BEARINGS AND LEAD RUBBER BEARINGS FOR NUCLEAR POWER PLANTS. SECED 2015 Conference: Earthquake Risk and Engineering towards a Resilient World, 9-10 July 2015, Cambridge UK.
The paper describes a wide testing campaign carried out on full scale prototypes of elastomeric isolators – both high damping rubber bearings (HDRB) and lead rubber bearings (LRB) – within the framework of the EC-funded SILER research project. The prototypes tested were designed for two reference nuclear power plants, the ELSY reactor and the MYRRHA reactor. Due to the typical huge masses of NPP, the related isolators often have large sizes. HDRB prototype is circular, with a diameter of 1350 mm; LRB prototype is square, with a side of 1250 mm, and four lead cores. The prototypes were subjected to different tests. One prototype was subjected to a complete type test campaign according to the European Standard EN 15129:2009, as well as to 3-D tests applying contemporarily displacement time-histories in two horizontal axes and vertical load time-history. Failure and post-failure tests were also performed, showing that the isolator, even after failure, is still able to sustain the vertical load and the horizontal displacement.