PUBLICATIONS

A. Masi, G. Santarsiero, M.R. Gallipoli, M. Mucciarelli, V. Manfredi, A. Dusi, T. Stabile (2013) Performance of the health facilities during the 2012 Emilia earthquake and analysis of the Mirandola Hospital case study. Bulletin of Earthquake Engineering DOI 10.1007/s10518-013-9518-4, .

This paper outlines the response of the healthcare system in the area mainly affected by the 2012 Emilia earthquake by drawing on specific surveys and information from local health authorities. A description of the damage suffered and characteristics of the healthcare system as a whole is offered initially, followed by a detailed description of the effects which took place at the Santa Maria Bianca hospital of Mirandola. The focus has been on damage to non structural elements and content, whose integrity is of primary importance for healthcare structures performance during and after a seismic event. Some instruments for the acquisition of accelerometric data were installed after the May 20 event both outside and inside a building which is part of the hospital complex. The seismic behavior of this building has also been analysed by means of a purposely made finite element model and on the basis of the recorded data. The contribution of undamaged and damaged masonry infills to the global seismic response has also been estimated thus providing some hints on the observed building performance.

 

The final publication is available at link.springer.com


E. Manzoni, A. Dusi, C. Dusi, V. Calzoni (2009) La schedatura delle strutture lignee in opera per il progetto di consolidamento: un esempio sulle coperture di due palazzi cremonesi. Atti del XV Convegno Internazionale “Scienza e beni culturali- conservare e restaurare il legno”, Bressanone, Italia, 23-26 Giugno, 2009.


E. Manzoni, A. Dusi, M. Mezzi (2008) Polymeric Grid for a Cost-Effective Enhancement of the Seismic Performance of Masonry Buildings. Proc 14th World Conference on Earthquake Engineering (14WCEE), Beijing, China, Oct. 12-17, 2008.


A. Dusi, M. Mezzi (2008) The Largest Base Isolation Project in the World. Proc 14th World Conference on Earthquake Engineering (14WCEE), Beijing, China, Oct. 12-17, 2008.


Dusi, A, Manzoni, E, Marcellini, A, Tento, A, Daminelli, R, and Mezzi, M (2008) Seismic assessment of structures by ambient vibrations: an application to a Medieval Tower,. 8thPCEE, Singapore 2007.

 


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A Dusi, M Mezzi, E Manzoni, C Dusi (2007) THE USE OF POLYMERIC GRIDS FOR THE SEISMIC ENHANCEMENT OF BRICK MASONRY BUILDINGS. 7º CONGRESSO DE SISMOLOGIA E ENGENHARIA SÍSMICA, Porto, 26-28 September 2007.

 The performance of masonry walls reinforced using polymeric grid embedded into plaster layers as a tools for the seismic enhancement of brick masonry buildings has been investigated by experimental tests. The results of the experimental campaigns are presented and discussed.

Based on the experimental data and on the results of detailed numerical simulations, simplified models to be used as tools for the design of the retrofitting intervention are proposed. The models properly consider the so called “first mode” and “second mode” collapse mechanisms as well as the grid effect in the evolution of the above mentioned mechanisms.

Restoration and conservation issues relevant to the application of the proposed methodology to historical building and cultural heritage are also presented and discussed.


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D Torrealva and A Dusi (2007) STRUCTURAL POLYMER GRID REINFORCEMENT FOR BRICK MASONRY WALLS – THE DUCTILE APPROACH. 10th North American Masonry Conference 10 NAMC, St. Louis, Missouri.

Reinforcing brick masonry walls with a structural polymer grid embedded in the plaster can be an effective alternative to change its traditionally brittle seismic behaviour into an energy dissipation system that would allow masonry buildings to successfully stand earthquake forces.

This report describes the work performed to investigate the post elastic effect of reinforcing masonry brick walls with a structural polymer grid applied on its surface and embedded in a sand cement plaster. Twelve 1.20 x 1.20m panels were built and tested to cyclic shear force with constant vertical compression load; another twelve 0.80 x 1.60 brick panels were built and subjected to transverse flexural monotonic loading and unloading test. Solid clay bricks were used for the construction of walls with different type of mortar for the layers and for the plaster, in an attempt to better simulate retrofitting conditions. For the shear-compression tests, four walls were tested without plaster, four with sand cement plaster and the last four with the grid reinforcement embedded in the plaster on both sides. For the flexural tests, the variables studied were the effect of plaster alone, the effect of the polymer grid applied on the tension and compression side and the effect of the vertical load. The results of the shearcompression tests indicated a small increment in the in-plane wall shear resistance due to the grid presence, and that there is almost no evidence of any increment in stiffness, the grid deformability, being much higher than that of the plaster, practically does not contribute significantly to the masonry strength, they showed however, a substantial increase of energy dissipation with respect to the unreinforced panels. Important results have been obtained from the out-of-plane load tests. They have clearly demonstrated the positive effects of the grid presence on the ultimate load, ultimate displacement and energy dissipation. These results have allowed developing an initial mathematical expression for the ultimate moment capacity of masonry walls reinforced with polymer grids.


A. Dusi, P. Clemente, M. Dolce, M. Forni, A. Martelli & A. Parducci (2007) Seismic Protection of School Buildings: the First Applications of Seismic Isolation to Italian Schools. Proc. 10th Assisi Conference, Istanbul, Turkey, May 28-31, 2007.


A. Dusi, E. Manzoni, Italy M. Mezzi, G. Rossi (2006) ESTIMATION OF THE SEISMIC RESPONSE OF CIVIL ENGINEERING STRUCTURES USING AMBIENT EXCITATIONS: A CASE STUDY. 10th Int. Conf. “Inspection, Appraisal, Repairs & Maintenance of Structures”,, Hong Kong 2006.

This paper deals with the dynamic characterisation and estimation of the seismic response of historical masonry structures, in particular medieval tower using ambient vibrations testing. The advantages and the reliability of the proposed methodology with respect to traditional methods, such as forced vibration tests, for evaluating the dynamic response of a structure are illustrated by making reference to a real case. The study demonstrates how ambient vibrations results can be obtained in a fast and non destructive way; their effectiveness in supporting the structural engineer in the assessment process and in providing a quantification of structural properties is also discussed.

Finally, the authors illustrates the use of accurate Finite Elements Models, calibrated on the measurements, in the evaluation of the collapse mechanisms and in the definition of the retrofitting interventions.