ALCANCES DEL PROYECTO

RESEARCH GROUP: Andrea Benedetti, Nicola Buratti, Pier Paolo Diotallevi, Giada Gasparini, Cristina Gentilini, Luca Landi, Claudio Mazzotti, Marco Savoia, Stefano Silvestri, Tomaso Trombetti, Francesco Ubertini KEYWORDS: masonry, consolidation, monuments, seismic vulnerability

The research focus on the development of consol- idation techniques that combine the conservation of monuments with the seismic protection of users. The activity includes:

(1) The development of experimental techniques for non-destructive characterization of the ma- sonry walls. In particular, advanced diagnostic and monitoring techniques are implemented and used in laboratory and on-site, to allow the non-destructive evaluation of the quality, the ‘homogeneity, the degradation and the state of health of structural elements in masonry, wood and concrete buildings. The development of new procedures for data acquisition, post-processing of the data and data fusion is pursued in order to maximize the potential of these techniques. (2) The analysis of seismic vulnerability of buildings and masonry bridges. In this context, a simplified methodology for the assessment of the vulnerability of existing RC structures and masonry has been developed (RESISTO). (3) The definition of consolidation techniques. Various solutions to repair structures have been studied. In particular composite materials with metal or carbon fibers, in a matrix of epoxy or cement-based have been studied. Numerous applications to real cases have been carried out. The results of the analysis were included in the guidelines document developed by CNR for the repair of composite materials CD 200/2004. (4) assessment of the structural damage induced by salts on masonry. The shear behaviour of ar- tificially damaged masonry specimens is investi- gated by means of an ad hoc experimental test. As well known, the shear behaviour of masonry buildings plays a crucial role for structures locat- ed in areas prone to seismic hazard.

MAIN PUBLICATIONS

Sassoni E., Mazzotti C. (2013) The use of small di- ameter cores for assessing the compressive strength of clay brick masonries. Journal of Cultural Herit- age 14S, 95-101.

Bitelli G., Colla C., Gabrielli E., Girardi F., Uberti- ni F. Quantitative monitoring of superficial decay evolution in plastered and unplastered outdoors masonry, Journal of Architectural Heritage (in print).

Gentilini C., Franzoni E., Bandini S., Nobile L. (2012) Effect of salt crystallisation on the shear be- haviour of masonry walls: An experimental study. Construction and Building Materials, 37, 181-189. Gasparini G., Silvestri S., Palermo M., Trombetti T., Dallavalle G. (2012) The monitoring system of the “Due Torri” in Bologna, Italy: preliminary re- sults, Proceedings of MEMSCON Workshop 2012 (7th European Framework Programme): Towards Intelligent Civil Infrastructure, Athens, Greece. Frick, J., Colla, C., Gabrielli, E., Gruener, F., (2012), “Seasonal Monitoring of Salt Movement in Masonry Materials”, In Cultural Heritage Pres- ervation, Proc. of EWCHP 2012, Kjeller, Norway, September 24th -26th, ed. E. Dahlin, NILU – Norwegian Institute for Air Research, ISBN 978- 82-425-2525-3, pp. 27-34.

Strojecki, M., Łukomski, M., Colla, C., Gabrielli, E., (2012), “Acoustic emission as a non-destruc- tive method for tracing damage: from laboratory testing to monitoring historic structures”, RILEM Bookseries, vol. 6, Proc. of NDTMS-2011 Int. Symp. on Nondestructive Testing of Materials and Structures, Istanbul Technical University, Turkey, May 15-18, Springer, ISBN: 978-94-007-0722-1, pp. 1131-1136.

F. Sandrolini, E. Franzoni, E. Sassoni, P.P. Diotal- levi. (2011). The contribution of urban-scale envi- ronmental monitoring to materials diagnostics: a study on the Cathedral of Modena (Italy). Journal of Cultural Heritage, 12, 441-450.

Colla C., Pascale G. (2010) Prove non distruttive e semidistruttive per la caratterizzazione delle mu- rature della torre Ghirlandina di Modena, in La

torre Ghirlandina – storia e restauro, R. Cadignani (a cura di), Luca Sossella editore s.r.l., Roma, pp. 218-227.

L. Landi, P.P. Diotallevi, R. Gabellieri (2010). Out- of-plane dynamic behaviour of unreinforced ma- sonry walls in buildings with flexible diaphragms. 14th European Conference on Earthquake Engi- neering. Ohrid, Republic of Macedonia.

Colla, C., Benedetti, A., (2009), “Applicazioni di tomografia acustica e prove di resistenza alla pene- trazione per la valutazione del degrado di elementi strutturali lignei antichi”, in Consolidamento delle strutture di legno, M. Piazza (Ed.), Benevento, Hevelius Edizioni, Ottobre, pp. 79-98.

L. Pelà, A. Aprile, A. Benedetti, (2009), “Seismic assessment of masonry arch bridges”, Engineering Structures, 31(8), August 2009, p. 1777-1788. A. Benedetti and E. Mangoni (2008), NDT eval- uation of ancient masonry properties by means of splitting tests on cores with diametric mortar layer, First International RILEM Symposium SACoMa- TiS 2008, 1-2 September 2008, Varenna, Italy, p. 431-441.

RESEARCH PROJECTS

ReLUIS 2005–2008: N. 8 Task 7: Criteri di progetto per l’adeguamento sismico di strutture in muratura.

ReLUIS 2009-2012: Area Tematica 2, Linea di Ricerca 3, Task 1: Sviluppo ed analisi di nuovi materiali per l’adeguamento sismico di volte e cupole in muratura.

SMooHS – Smart Monitoring of Historical Structures, FP7-2008, Collaborative EU pro- ject. Project Ref.: 212939.

3ENCULT – Efficient Energy for EU Cultur- al Heritage, FP7-2010, Collaborative EU pro- ject. Project Ref.: 260162.

CONTACTS

[email protected] [email protected]

Fig. 1. Rising moisture: numerical model and experimental evidence.

Fig. 2. Linear dynamic analysis: modal identifi- cation of an historical bridge.

Fig. 3. Linear dynamic analysis of an historical church. Longitudinal section of a main eigen- mode.

NUMERICAL TECHNIQUES FOR THE STUDY OF HISTORICAL MASONRY